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Double-Take Availability for Hyper-V User`s Guide

1. Le beans Source Target Hyper V Host Hyper V Host Chapter 1 Double Take Availability for Hyper V overview Agentless Hyper V requirements Make sure your servers and virtual machines meet the following requirements e Source and target host operating system Y our source and target host servers can be any Windows 2008 2008 R2 2012 or 2012 R2 operating system that has the Hyper V role enabled In addition you can use Hyper V Server 2008 R2 Server Core 2008 R2 SP1 Server Core 2012 or Server Core 2012 R2 with the Hyper V role enabled Hyper V Server 2008 and Server Core 2008 are not supported In each case the source and target must be running identical operating system versions For example your source cannot be Windows 2008 or Windows 2012 and your target Windows 2008 R2 or Windows 2012 R2 r If your source is using Windows 2008 R2 Service Pack 1 and the virtual machines you will be protecting are configured to use dynamic memory then your target must have the same service pack level as the source e Guest operating systems The guest operating system can be any operating system However if you want Double Take to monitor the virtual machine for failover then you must have Integration Components installed on the guest operating system and the virtual machine must be powered on e Server Core lIn addition to the Server Core requirements above there is a Server Core limitation DNS updates are not supported for Ser
2. Clear 4 Filter Time Description Service This button copies the messages selected in the Server logs window to the Windows clipboard This button clears the Server logs window The messages are not cleared from the respective files on the server If you want to view all of the messages again close and reopen the Server logs window From the drop down list you can select to view all log messages or only those messages from the Double Take log or the Double Take Management Service log This column in the table indicates the date and time when the message was logged This column in the table displays the actual message that was logged This column in the table indicates if the message is from the Double Take log or the Double Take Management Service log Chapter 10 Managing servers 102 Managing snapshots A snapshot is an image of the source replica data on the target taken at a single point in time Snapshots allow you to view files and folders as they existed at points of time in the past so you can for example recover from cases where corrupted source data was replicated to the target For some Double Take job types when failover is triggered you can use the live target data at the time of failover or you can failover to a snapshot of the target data 1 From the Manage Jobs page highlight the job and click Manage Snapshots in the toolbar 2 You will see the list of snapshots if any associated with the jo
3. Oo Queue folder C Program Files Vision Solutions Double Take sa A dedicated non boot volume will offer the best performance and reliability Amount of system memory to use MB Minimum free disk space M8 922 Zj 35 Zj 1023 250 C Do not use disk queue Alert at this queue usage Unlimited disk queue 50 Limit disk space for queue MB zj Changing the queue location or memory usage will not take effect until the service has been restarted e Queue folder This is the location where the disk queue will be stored Any changes made to the queue location will not take effect until the Double Take service has been restarted on the server When selecting the queue location keep in mind the following caveats e Select a location on a non clustered volume that will have minimal impact on the operating system and applications e Select a location that is on a different volume as the location of the Windows pagefile e Select a dedicated non boot volume e Do not select the root of a volume e Do not select the same physical or logical volume as the data being replicated e Ona Windows 2012 server do not select a volume where deduplication is enabled Although the read write ratio on queue files will be 1 1 optimizing the disk for write activity will benefit performance because the writes will typically be occurring when the server is under a high load and more reads will be occurrin
4. Ifyou are using domain credentials for your Double Take servers and you change those credentials you will continue to receive a Windows Security pop up in the Double Take Console even if you enter correctly updated credentials in the pop up This is an unavoidable Windows WCF communication issue and you must update the credentials for the Double Take servers in the Double Take Console in order to terminate the repeated pop ups Chapter 10 Managing servers 74 Viewing server details Highlight a server on the Manage Servers page and click View Server Details from the toolbar The View Server Details page allows you to view details about that particular server The server details vary depending on the type of server or appliance you are viewing Server name The name or IP address of the server If you have specified a reserved IP address it will be displayed in parenthesis Operating system Roles Status Activity Connected via Version The server s operating system version The role of this server in your Double Take environment In some cases a server can have more than one role e Engine Role Source or target server e Image Repository Role A target for a DR protection job or a source for a DR recovery job e Controller Role Controller appliance for an agentless vSphere job e Replication Appliance Role Replication appliance for an agentless vSphere job e Reporting Service Double Take Reporting Service s
5. e Fixed bandwidth limit Double Take will transmit data using a limited fixed bandwidth Select a Preset bandwidth limit rate from the common bandwidth limit values The Bandwidth field will automatically update to the bytes per second value for your selected bandwidth This is the maximum amount of data that will be transmitted per second If desired modify the bandwidth using a bytes per second value The minimum limit should be 3500 bytes per second e Scheduled bandwidth limit If your job has a configured scheduled bandwidth limit you can enable that schedule with this option e Delete Orphans Even if you have enabled orphan file removal during your mirror and verification processes you can manually remove them at any time e Target You can pause the target which queues any incoming Double Take data from the source on the target All active jobs to that target will complete the operations already in progress Any new operations will be queued on the target until the target is resumed The data will not be committed until the target is resumed Pausing the target only pauses Double Take processing not the entire server While the target is paused the Double Take target cannot queue data indefinitely If the target queue is filled data will start to queue on the source If the source queue is filled Double Take will automatically disconnect the connections and attempt to reconnect them If you have multiple jobs to the same
6. Views event messages for a server This button leaves the Manage Servers page and opens the View Server Events page See the Reference Guide for a complete list of Windows event messages peen View Server Logs Views the Double Take logs messages for a server This button opens the Logs window This separate window allows you to continue working in the Double Take Console while monitoring log messages You can open multiple logging windows for multiple servers When the Double Take Console is closed all logging windows will automatically close Activate Online af Activates licenses and applies the activation keys to servers in one step You must have Internet access for this process You will not be able to activate a license that has Chapter 10 Managing servers 69 already been activated Gather Support Diagnostics eh Executes the diagnostic DTInfo utility which collects configuration data for use when reporting problems to technical support It gathers Double Take log files Double Take and system settings network configuration information such as IP WINS and DNS addresses and other data which may be necessary for technical support to troubleshoot issues You will be prompted for a location to save the resulting file which is created with the information gathered Because this utility is gathering several pieces of information across the network to your console machine it may take several minutes to complete the informa
7. Chapter 3 Creating an agentless Hyper V job 24 e Update these source DNS entries with the corresponding target IP address For each IP address on the source specify what address you want DNS to use after failover For clusters be sure and select the clustered IP address e Update TTL Specify the length of time in seconds for the time to live value for all modified DNS A records Ideally you should specify 300 seconds 5 minutes or less DNS updates will be disabled if the target server cannot communicate with both the source and target DNS servers If you select Retain your target network configuration but do not enable Update DNS server you will need to specify failover scripts that update your DNS server during failover or you can update the DNS server manually after failover This would also apply to non Microsoft Active Directory integrated DNS servers You will want to keep your target network configuration but do not update DNS In this case you will need to specify failover scripts that update your DNS server during failover or you can update the DNS server manually after failover Chapter 3 Creating an agentless Hyper V job 25 Mirror Verify amp Orphaned Files Mirror Verify amp Orphaned Files Mirror Options Choose a comparison method and whether to mirror the entire file or only the bytes that differ in each file Compare file attributes and data Send the attributes and bytes that differ Recomm
8. For example hexadecimal number 23 converts to 100011 so the 16 digit binary equivalent would be 0000000000100011 3 Determine what number 0 or 1 appears in each position of the binary number Because binary numbers count from right to left start with position 1 on the right 1 Read only 2 Hidden 3 None 4 System 5 Directory 6 Archive 7 Encrypted 8 Normal 9 Temporary 10 Sparse file 11 Reparse point 12 Compressed 13 Offline 14 Not content indexed 15 None 16 None 4 Using the list above identify those attributes that are enabled by those positions equal to one 1 The positions equal to zero 0 are disabled and that attribute does not apply So hexadecimal number 23 which converted to 0000000000100011 indicates read only hidden and archive Another example might be mask 0x827 which converted to binary is 0000100000100111 Positions 1 3 6 and 12 are all enabled which indicates the file is read only hidden archive and compressed P Files that were replicated with the Replicate NTFS security attributes by name feature enabled will be identified as different in the log file because of the local name attribute The files will be the same Chapter 10 Managing servers 99 Viewing server events Highlight a server on the Manage Servers page and click View Server Events from the toolbar The View Server Events page displays the same messages that are logged to the Windows Event Viewer T
9. Replication has been stopped Out of Memory Replication memory has been exhausted Failed The Double Take service is not receiving replication operations from the Double Take driver Check the Event Viewer for driver related issues Unknown The console cannot determine the status Active Data is being transmitted to the target Paused Data transmission has been paused Scheduled Data transmission is waiting on schedule criteria Stopped Data is not being transmitted to the target Error tThere is a transmission error Unknown The console cannot determine the status Chapter 6 Managing and controlling agentless Hyper V jobs 40 Detailed job information displayed in the bottom pane The details displayed in the bottom pane of the Manage Jobs page provide additional information for the job highlighted in the top pane If you select multiple jobs the details for the first selected job will be displayed Name The name of the job Target data state e OK The data on the target is in a good state e Mirroring The target is in the middle of a mirror process The data will not be ina good state until the mirror is complete e Mirror Required The data on the target is not in a good state because a remirror is required This may be caused by an incomplete or stopped mirror or an operation may have been dropped on the target e Snapshot Reverted The data on the source and target do not match because a snapshot h
10. There are also limitations imposed by Microsoft Volume Shadow Copy that impact Double Take snapshots For example different Double Take job types create different snapshot types either client accessible or non client accessible VSS only maintains 64 client Chapter 2 Agentless Hyper V requirements 8 accessible snapshots while it maintains 512 non client accessible snapshots If the maximum number of snapshots exists and another one is taken the oldest snapshot is deleted to make room for the new one Another example is that Double Take snapshots must be created within one minute because Volume Shadow Copy snapshots must be created within one minute If it takes longer than one minute to create the snapshot the snapshot will be considered a failure Additionally Volume Shadow Copy will not revert snapshots of a volume with operating system files therefore Double Take is also unable to revert a volume with operating system files You must also keep in mind that if you are using extended functionality provided by Volume Shadow Copy you need to be aware of the impacts that functionality may have on Double Take For example if you change the location where the shadow copies are stored and an error occurs it may appear to be a Double Take error when it is in fact a Volume Shadow Copy error Be sure and review any events created by the VolSnap driver and check your Volume Shadow Copy documentation for details e Other snapshot functio
11. you will continue to receive a Windows Security pop up in the Double Take Console even if you enter correctly updated credentials in the pop up This is an unavoidable Windows WCF communication issue and you must update the credentials for the Double Take servers using Provide Credentials in order to terminate the repeated pop ups Chapter 10 Managing servers 68 Manage Group Assignments lp Install D Uninstall Copy lt 2 Paste A Allows you to assign move and remove the selected server from specific server groups This buttons opens the Manage Group Assignments dialog box where you can assign and unassign the server to specific server groups The server will appear in server groups marked with a checkmark and will not appear in groups without a checkmark Servers assigned to a server group will automatically appear in parent server groups Installs or upgrades Double Take on the selected server This button opens the Install page where you can specify installation options Uninstalls Double Take on the selected server Copies the information for the selected servers You can then paste the server information as needed Each server is pasted on a new line with the server information being comma separated Pastes a new line separated list of servers into the console Your copied list of servers must be entered on individual lines with only server names or IP addresses on each line S View Server Events iM
12. 48 47 AM 2 14 2012 6 48 47 AM 2 14 2012 6 48 48 AM 2 14 2012 6 48 48 AM 2 14 2012 6 48 48 AM 012 6 48 48 AM 2 14 2012 6 48 48 AM 2 14 2012 6 48 48 AM 2 14 2012 6 48 48 AM 2 14 2012 6 48 48 AM 2 14 2012 6 48 48 AM 012 6 48 50 AM 012 6 48 50 AM 1012 6 48 50 AM 012 6 48 50 AM 012 6 48 50 AM 012 6 48 52 AM 012 6 48 52 AM 1012 6 48 52 AM 012 6 48 52 AM 012 6 48 52 AM J 012 7 05 45 AM 2 14 2012 7 05 48 AM 2 14 2012 7 05 48 AM 2 14 2012 7 05 48 AM 2 14 2012 7 05 51 AM 2 14 2012 7 05 51 AM 2 14 2012 7 05 51 AM Target beta is a NOT a cluster Setting JobFilePath default Entered TopState Entered UninitializedState Attaching to engine monitor 00000000 0000 0000 0000 000000000000 Changing to StoppedState from UninitializedState in response to InitializeEvent consumed Exited UninitializedState Entered InitializedStete Entered StoppedState Stopping monitor ab2268f7 85c6 4b68 819c 3d2912f5380a name FilesAndFolders_a6cb Successfully created monitor 618b51de 70f0 418b 9869 169f6f7d7049 Changing to StartingState from StoppedState in response to StartEvent consumed by Stop Exited StoppedState Entered StartingState Event log entry written 6008 Target beta is not clustered Changing to RunningState from StoppedState in response to StartEvent consumed by Stop Exited StoppedState Entered RunningState Starting monitor ab2268f7 85c6 4b68 819c 3d2912f5380a name FilesAndFolders_a6cbf Entered SucceededSta
13. 9 ee Not You can protect virtual machines on multiple Many to one hosts to one single host This will consolidate your replica virtual machines to a single host You can protect virtual machines on a single host to multiple target hosts although individual virtual machines can only be protected once to a single target host The will allow you to separate your replica virtual machines across multiple target hosts One to many You cannot protect virtual machines on host 1 Chained to host 2 and then protect them again from host 2 to host 3 You can protect virtual machines within the Single server X same host or cluster Standaloneto Your hosts can be in a standalone to x standalone standalone configuration Standaloneto Your hosts can be in a standalone to cluster cluster configuration Cluster to Your hosts can be in a cluster to standalone standalone configuration Cluster to Your hosts can be in a cluster to cluster x cluster configuration Cluster Shared You cannot protect a virtual machine on a Volumes Cluster Shared Volume from within the guest x CSV guest operating system because agentless Hyper V level jobs are host level jobs Chapter 2 Agentless Hyper V requirements 10 ere Not CSV support at the host level is for Windows 2012 and 2012 R2 only Although CSV is not supported for host level protection for Windows 2008 you can use host level protection for non CSV virtual machines on a CS
14. Log file properties eresas c cece c cece cece e e aA 96 Verification 10g 2 00 20 coe ce cece cece cee c cece cece ccecceceeceeceeesereeeeeeeeess 98 Viewing server events 2 0 22 0 coe c eee eee cece cece cece ce ceeceeececeeceeeeeececeeeesees 100 Viewing server lOgS 0 20 2 cece cece cece cece ccc cecceceeeececeeceeeeeeveceeceesereeeees 101 Managing snapshots 0 0 0 ccc eee ccc ecceceececceeceeccececceecececedeeccecceceeeeeeees 103 SNapshot states 0 x don cis ta teaponnsvdavda denen ee tiene anes dine duane a nhl otdwhnan ts a 103 Contents 3 Double Take Availability for Hyper V overview Double Take Availability ensures the availability of critical workloads Using real time replication and failover you can protect multiple virtual machines on a Windows Hyper V host Because Double Take Availability for Hyper V is agentless you can protect your virtual machines without having to install Double Take on each guest You identify the virtual machines on your production Hyper V host known as the source and replicate them to a backup Hyper V host known as the target The target server ona local network or at a remote site stores a replica of each virtual machine Double Take monitors any changes to the source and sends the changes to the replica copies stored on the target By replicating only the file changes rather than copying an entire file Double Take allows you to more efficiently use resources
15. Name Message Severity Message ID Message Description The first and last components Subject Prefix and Message Description are optional The subject line is limited to 255 characters If desired enter unique text for the Subject prefix which will be inserted at the front of the subject line for each Double Take e mail message This will help distinguish Double Take messages from other messages This field is optional If desired enable Add event description to subject to have the description of the message appended to the end of the subject line This field is optional e Includes these events Specify which messages that you want to be sent via e mail Specify Information Warning and or Error You can also specify which messages to exclude based on the message ID Enter the message IDs as a comma or semicolon separated list You can indicate ranges within the list Pi When you modify your e mail notification settings you will receive a test e mail summarizing your new settings You can also test e mail notification by clicking Test By default the test will be run from the machine where the console is running If desired you can send the test message to a different e mail address by selecting Send To and entering a comma or semicolon separated list of addresses Modify the Message Text up to 1024 characters if necessary Click Send to test the e mail notification The results will be displayed in a message box E mail notificati
16. able to edit a job if you have removed the source of that job from your Double Take Console session or if you only have Double Take monitor security access You will see the same options available for your agentless Hyper V job as when you created the job but you will not be able to edit all of them If desired edit those options that are configurable for an existing job See Creating an agentless Hyper V job on page 13 for details on each job option Changing some options may require Double Take to automatically disconnect reconnect and remirror the job 4 Click Next to continue Double Take validates that your source and target are compatible The Summary page displays your options and validation items Errors are designated by a white X inside a red circle Warnings are designated by a black exclamation point inside a yellow triangle A successful validation is designated by a white checkmark inside a green circle You can sort the list by the icon to see errors warnings or successful validations together Click on any of the validation items to see details You must correct any errors before you can continue Depending on the error you may be able to click Fix or Fix All and let Double Take correct the problem for you For those errors that Double Take cannot correct automatically you will need to modify the source or target to correct the error or you can select a different target You must revalidate the selected servers b
17. apply to clusters e Multiple networks are recommended to isolate public and private traffic e The private network should be a unique subnet so that Double Take will not attempt to use an unreachable private network e Your network can contain direct LAN connections or VLAN technology e For Windows 2003 the cluster nodes must be on the same logical IP subnet e For Windows 2003 the maximum round trip latency between nodes should be no more than 2 second e Advanced network support such as WAN support If you want Double Take to automatically update networking on the guest operating system during failover for example for WAN support the following limitations apply If you choose not to have Double Take automatically update networking on the guest operating system during failover you will have to update the network manually but the following limitations will not apply e Guest operating system The guest operating system must be Windows 2003 2008 or 2012 e Windows Management Instrumentation WMI The host and guest operating systems must have the WMI service enabled e User Access Control UAC UAC must be disabled on the guest operating system e Name resolution You must establish name resolution for the guest operating system e DNS updates Some job types allow you to failover Microsoft DNS records so the source server name resolves to the target IP addresses at failover time To be able to set up and failover M
18. automatically installed to the operating system boot volume Make sure you have additional disk space for Double Take queuing logging and so on e Server name Double Take includes Unicode file system support but your server name must still be in ASCII format If you have the need to use a server s fully qualified domain name your server cannot start with a numeric character because that will be interpreted as an IP address Additionally all Double Take servers must have a unique server name Ifyou need to rename a server that already has a Double Take license applied to it you should deactivate that license before changing the server name That includes rebuilding a server or changing the case capitalization of the server name upper or lower case or any combination of case If you have already rebuilt the server or changed the server name or case you will have to perform a host transfer to continue using that license See the Double Take Installation Licensing and Activation document for complete details e Time The clock on your Double Take servers must be within a few minutes of each other relative to UTC Large time skews will cause Double Take errors e Microsoft _NET Framework Microsoft NET Framework version 4 0 Update 3 or later is required on the source and target The full NET 4 0 3 is required not just the Client Profile e Windows Management Instrumentation WMI Double Take is dependent on the WMI servi
19. complete e State Good e Description Because the restoration is complete the data on the source and target is synchronized Chapter 10 Managing servers 105 e Automatic action taken for scheduled and automatic snapshots Scheduled and automatic snapshots will occur normally e User interaction required for manual snapshots Manual snapshots can be taken normally To be completely assured that your data on the target is good automatic and scheduled snapshots only occur when the data is in a good Double Take state However manual snapshots can be taken during any state There are instances when you may want to take a manual snapshot even if the target data is in a bad state For example if you drop an operation that does not necessarily mean your data on the target is corrupt or the target would be unable to stand in for the source in the event of a failure A snapshot of a bad state may be useful and usable depending on your environment If your source is a file server and an operation has been dropped it is just one user file that is out of date All of the remaining target files are intact and can be accessed in the event of a failure However if your source is an application server and an operation has been dropped that one file could cause the application not to start on the target in the event of a failure In these cases manual snapshots of a bad state depend on the context of your environment Chapter 10 Managing se
20. configuration Recommended for WAN configurations Update DNS server CA DNS Options Credentials for domain com User name administrator e Retain target network configuration Because the network configuration is set in Replica Virtual Machine Network Settings section the network configuration is automatically set to retain the target which is in essence retaining the replica identity This section is essentially for updating DNS if desired e Update DNS server Specify if you want Double Take to update your DNS server on failover If DNS updates are made the DNS records will be locked during failover rA DNS updates are not available for Server Core servers or source servers that are in a workgroup Expand the DNS Options section to configure how the updates will be made The DNS information will be discovered and displayed If your servers are in a workgroup you must provide the DNS credentials before the DNS information can be discovered and displayed e Change lf necessary click this button and specify a user that has privileges to access and modify DNS records The account must be a member of the DnsAdmins group for the domain and must have full control permissions on the source s A host and PTR reverse lookup records These permissions are not included by default in the DnsAdmins group e Remove lIf there are any DNS servers in the list that you do not want to update highlight them and click Remove
21. equivalent to selecting the mirror different files and use block checksum options prior to Double Take version 7 1 If you are using a database application on your source select this option e Verification Options Choose if you want to periodically confirm that the source replica data on the target is identical to the actual data on the source Verification creates a log file detailing what was verified as well as which files are not synchronized If the data is not the same you can automatically initiate a remirror if configured The remirror ensures data integrity between the source and target Because of the way the Windows Cache Manager handles memory machines that are doing minimal or light processing may have file operations that remain in the cache until additional operations flush them out This may make Double Take files Chapter 3 Creating an agentless Hyper V job 26 Pi on the target appear as if they are not synchronized When the Windows Cache Manager releases the operations in the cache on the source and target the files will be updated on the target e Enable scheduled verification When this option is enabled Double Take will verify the source replica data on the target e Verify on this interval Specify the interval between verification processes e Begin immediately Select this option if you want to start the verification schedule immediately after the job is established e Begin at this time Select thi
22. locally c Delete the protection job and when prompted select to keep the replica TA Even though you are keeping the replica virtual machine it is not registered with the Hyper V Manager If you want to use the replica machine you will have to register it However you do not need to register it to reuse the disks in Double Take Double Take will automatically register the virtual machine at failover time d Shut down and move the Hyper V target server to your remote site e After the Hyper V target server is back online at the remote site create a new protection job for the same source server Double Take will reuse the existing hard disk files and perform a difference mirror over the WAN to bring the virtual machine up to date Chapter 3 Creating an agentless Hyper V job 19 Replica Virtual Machine Configuration f A Replica Virtual Machine Configuration Replica virtual machine display name alpha_Replica Map source virtual switches to target virtual switches Source Network Adapter Target Network Adapter Local Area Connection Virtual Network Local Area Connection Virtual Network Map source VLAN ID to target VLAN ID Source VLAN ID Target VLAN ID a o 0 le e Replica virtual machine display name Specify the name of the replica virtual machine This will be the display name of the virtual machine on the host system You will not see this option if you are protecting more than one virtual
23. of bytes that are not synchronized between the file on the source and the file on the target If the data in the file is identical the message 0 BYTES OUT OF SYNC will be logged If the file is different the message will indicate how many bytes were different This message does not indicate that the file was remirrored during the verify The mask must be converted in order to determine what attributes are assigned to a file The mask is a hexadecimal number corresponding to a binary number that indicates what the attributes are Using the following steps you can determine how the mask corresponds to the attributes of a file Chapter 10 Managing servers 98 1 Each mask begins with Ox Identify the hexadecimal number after the constant Ox For example if the mask is 0x23 then the hexadecimal number you are interested in is 23 The hexadecimal number may be up to four digits 2 Convert the hexadecimal number to its 16 digit binary equivalent You can use the Windows calculator for this conversion a gt a Oa0 8 Select Calculator from your Accessories program or apps group Switch to scientific view if it is not already in that view by selecting View Scientific Select Hex Enter the hexadecimal number for example 23 as specified in your verification log Select Bin and the hexadecimal number will change to the binary equivalent Pad the beginning of the binary equivalent with zeroes 0 so that the number is 16 digits long
24. process hard links on the target If you disable the calculation and thus the report generation the hard link processing that occurs on the target will be ineffective and you may have problems after failover especially if your source is Windows 2008 or 2012 Chapter 10 Managing servers 90 Target server properties These properties are specific to the target server role G Target r Target system n memory thresholds Tammen Pause mirroring at this level 5 Resume mirroring at this level 20 15 Retry delay for incomplete operations seconds 3 Zj zj Block target paths upon connection I Move deleted files to this folder C Program Files Vision Solutions Double Take Deleted Files eS Remove deleted files after t F Zj 2 z e Pause mirroring at this level You can specify the maximum percentage of Windows system memory that can contain mirror data before the target signals the source to pause the sending of mirror operations The default setting is 20 e Resume mirroring at this level You can specify the minimum percentage of Windows system memory that can contain mirror data before the target signals the source to resume the sending of mirror operations The default setting is 15 You cannot set the resume value higher than the pause value e Retry delay for incomplete operations This option specifies the amount of time in seconds before retrying a failed operation on the t
25. sent to the target during mirroring and replication The target must obtain the security ID SID for the users and groups that are assigned permissions which takes some time If the users and groups are not on the target server the delay can be substantial The performance impact of enabling this option will vary depending on the type of file activity and other variables For instance it will not affect the overall performance of large database files much Chapter 10 Managing servers 89 since there is a lot of data but only a few file permissions but may affect the performance of user files significantly since there are often thousands of files each with permissions In general the performance impact will only be noticed during mirrors since that is when the target workload is greatest Regardless of the security model you are using if you create new user accounts on the source you should start a remirror so the new user account information associated with any files in your job can be transmitted to the target e Maximum pending mirror operations This option is the maximum number of mirror operations that are queued on the source The default setting is 1000 If during mirroring the mirror queued statistic regularly shows low numbers for example less than 50 this value can be increased to allow Double Take to queue more data for transfer e Size of mirror packets This option determines the size of the mirror packets in byt
26. target all jobs from the same source will be paused and resumed e Update Shares Shares are not applicable because they are automatically included with the system state that is being protected with the entire server Filter Select a filter option from the drop down list to only display certain jobs You can display Healthy jobs Jobs with warnings or Jobs with errors To clear the filter select All jobs If you have created and populated server groups then the filter will only apply to the jobs associated with the server or target servers in that server group See Managing servers on page 66 Type a server name Displays only jobs that contain the text you entered If you have created and populated server groups then only jobs that contain the text you entered associated with the server or target servers in that server group will be displayed See Managing servers on page 66 Chapter 6 Managing and controlling agentless Hyper V jobs 47 Overflow Chevron t Displays any toolbar buttons that are hidden from view when the window size is reduced Chapter 6 Managing and controlling agentless Hyper V jobs 48 Viewing agentless Hyper V job details From the Manage Jobs page highlight the job and click View Job Details in the toolbar Review the following table to understand the detailed information about your job displayed on the View Job Details page Job name The name of the job Job type Each job type has a unique
27. the Workload types pane select Agentless Hyper V In the Workload items pane select the virtual machines on the Hyper V source that you want to protect The list of virtual machines will vary depending on whether your source is a Hyper V server cluster or node If the workload you are looking for is not displayed enable Show all workload types The workload types in gray text are not available for the source server you have selected Hover your mouse over an unavailable workload type to see a reason why this workload type is unavailable for the selected source Choose Data Choose the data on this server that you want to protect 7 a Server Workloads Workload types Workload items Y Agentless Hyper V BW _ Hyper V Machine _ Files and Folders VV alpha oi Full Server beta Se Guest Level Hyper V a gE Full Server to Hyper V or ESX T Show all workload types Replication Rules 7 Click Next to continue 8 Choose your target server This is the Hyper V server or cluster that will store the replicas of the virtual machines from the source Chapter 3 Creating an agentless Hyper V job 14 Choose Target Server Choose the server that will store the protected data i 4 PA Current Servers Servers Version Product 7 1 0 798 0 Double Take Availability for Windows Premium Edition 7 1 0 798 0 Double Take Availability for Windows Premium Edition v Find a New Server I Diagnostics job Cu
28. the server group folder selected in the left pane Every job for each server in your console session is displayed when the Jobs on All Servers group is selected If you have created and populated server groups see Managing servers on page 66 then only the jobs associated with the server or target servers in that server group will be displayed in the right pane e See Overview job information displayed in the top pane on page 38 e See Detailed job information displayed in the bottom pane on page 41 e See Job controls on page 43 Overview job information displayed in the top pane The top pane displays high level overview information about your jobs Column 1 Blank The first blank column indicates the state of the job 2 The job is in a healthy state A The job is in a warning state This icon is also displayed on any server groups that you have created that contain a job in a warning state x The job is in an error state This icon is also displayed on any server groups that you have created that contain a job in an error state The job is in an unknown state Job The name of the job Source Server The name of the source This could be a name or IP address of a standalone server a cluster or anode Cluster jobs will be associated with the cluster name and standalone jobs will be associated with a standalone server or a cluster node Target Server The name of the target This could be aname or IP address of a standalone se
29. this option is called View Logs and you have the option of opening the job log source server log or target server log Other Job Actions vi Opens a small menu of other job actions These job actions will be started immediately but keep in mind that if you stop and restart your job the job s configured settings will override any other job actions you may have initiated e Mirroring You can start stop pause and resume mirroring for any job that is running When pausing a mirror Double Take stops queuing mirror data on the source but maintains a pointer to determine what information still needs to be mirrored to the target Therefore when resuming a paused mirror the process continues where it left off When stopping a mirror Double Take stops queuing mirror data on the source and does not maintain a pointer to determine what information still needs to be mirrored to the target Therefore when starting a mirror that has been stopped you will need to decide what type of mirror to perform Chapter 6 Managing and controlling agentless Hyper V jobs 45 e Mirror Options Choose a comparison method and whether to mirror the entire file or only the bytes that differ in each file Do not compare files Send the entire file Double Take will not perform any comparisons between the files on the source and target All files will be mirrored to the target sending the entire file This is equivalent to selecting the mirror all fi
30. using the current data on the target This option will leave the source machine online stop the protection job and start the replica virtual machine on the target without network connectivity e Failover to a snapshot Select this option to initiate a full live failover without using the current data on the target Instead select a snapshot and the data on the target will be reverted to that snapshot This option will not be available if there are no snapshots on the target or if the target does not support snapshots To help you understand what snapshots are available the Type indicates the kind of snapshot e Scheduled This snapshot was taken as part of a periodic snapshot e Deferred This snapshot was taken as part of a periodic snapshot although it did not occur at the specified interval because the job between the source and target was not in a good state e Manual This snapshot was taken manually by a user 3 Select how you want to handle the data in the target queue e Apply data in target queues before failover or cutover All of the data in the target queue will be applied before failover begins The advantage to this option is that all of the data that the target has received will be applied before failover begins The disadvantage to this option is depending on the amount of data in queue the amount of time to apply all of the data could be lengthy Discard data in the target queues and failover or cutover immedia
31. your server by entering the activation key in the Add license keys and activations keys field and clicking Add e Obtain activation key offline then activate lf you do not have Internet access go to https activate doubletake com from another machine that has Internet access Complete and submit the activation form and you will receive an e mail with the activation key Activate your server by entering the activation key in the Add license keys and activations keys field and clicking Add The activation key is specific to this server It cannot be used on any other server If the activation key and server do not match Double Take will not run Pi If your Double Take Availability license keys needs to be activated you will have 14 days to do so If you need to rename a server that already has a Double Take license applied to it you should deactivate that license before changing the server name That includes rebuilding a server or changing the case capitalization of the server name upper or lower case or any combination of case If you have already rebuilt the server or changed the server name or case you will have to perform a host transfer to continue using that license Chapter 10 Managing servers 80 Server setup properties gt Setup IV Log statistics automatically Enable task command processing _ Advertise service with Active Directory V Mirror only changed files when source reboots JV Automatically recon
32. 000000 c occ c ccc ec ccc eecceceeceeceeeceeceeceeeeees 60 Double Take Console requirements 2 20 00 0 0 20 cece eee cece eee ecceceeceeeceeeeeeees 62 Console options 2 0 2 20 20 c cece eee cece ccc e cece cece eee eecceceeceeceeceeceeetereeeceeesees 63 Chapter 10 Managing servers __ 2 2 02 eee eee 66 Adding SCIVErS score cede Rides a oleh a aee ME cae ain ditt Sak ne eS wena ice 72 Providing server credentials 2 2 0 000 c cece eee ec cece ccc ceeceeceeceeceeceeceeceesees 74 Viewing server details 2 0 20 0 00 c cece cece cece cece ccc ec eee eeeececececececcecceeceeeeeeee 75 Editing server properties l 0 000000000 ccc cece ccc cece eee ce cece ee ceeceeceeeveceeeeerereees 77 General server properties 2 20 2 0 00 0 c cece eee e eee ec cece cee ceceececececeeceeseeeees 78 Server licensing 2 2 0 cece eee eee ee ec cece eee e cece cece cececceeceeeeececececeecceereees 79 Server setup properties 2 0 00 ooo c ccc cc cece eee cce cee cceceveeeeecesseeenees 81 Double Take queue 220 2020 eee cece cece cece cece ce ceeceeceeetececseeceeeeeeeees 85 Source server properties 22 2 c cece ccccecccccccecccecccecccecccecccecceeeceesceeeaes 89 Target Server properties o oo cocoon ede eee iaa ve Soden eee 91 E mail notification configuration 00 00 00 c cece cece ccc ec ccc eeceecceceeceeceeees 93 SCrIDECrEdeNtalS e253 00 estes octet cee a oo keene oma 95
33. 10 Managing servers 81 e Source server restart lf your source server is restarted Double Take will automatically reconnect any jobs that were previously connected Then if configured Double Take will automatically remirror the data This process is called auto remirror The remirror re establishes the target baseline to ensure data integrity so disabling auto remirror is not advised e Exhausted queues on the source If disk queuing is exhausted on the source Double Take will automatically start disconnecting jobs This is called auto disconnect The transaction logs and system memory are flushed allowing Double Take to begin processing anew The auto reconnect process ensures that any jobs that were auto disconnected are automatically reconnected Then if configured Double Take will automatically remirror the data This process is called auto remirror The remirror re establishes the target baseline to ensure data integrity so disabling auto remirror is not advised e Exhausted queues on the target If disk queuing is exhausted on the target the target instructs the source to pause The source will automatically stop transmitting data to the target and will queue the data changes When the target recovers it will automatically tell the source to resume sending data If the target does not recover by the time the source queues are exhausted the source will auto disconnect as described above The transaction logs and system memory from
34. Default Instance Databases User Databases Adding logical item db1 SQL Default Instance Databases User Databases dbi Adding logical item master SQL Default Instance Databases System Databases master Adding logical item model SQL Default Instance Databases System Databases model Adding logical item msdb SQL Default Instance Databases System Databases msdb Adding logical ite Adding logical item ReportServerTempDS SQL Default Instance Databases User Databas tempdb SOL Default Instance Databases System Databases tempdb Adding logical item D D Workload Apply Defaults Adding logical item Hyper V Virtual Machine Vm System Management ManagementException Invalid namespace at System Managem GetFilesCommand for C returned 16 items GetFilesCommand for C SgInfo returned 3 items Start gt Pause ii This button starts the addition and scrolling of new messages in the window 1 Jobs Working Directory SQL Default Instance SQL Server Folders Jo g Replication Tasks Path SQL Default Instance SQL Server Folders Rep Adding logical item System Databases SQL Default Instance Databases System Databas ReportServer SQL Default Instance Databases User Databases Repo Management Service Management Service Management Service Management Service Management Service Management Service Management Service Management Service Management Service Management Service Management Service Mana
35. Double Take AVAILABILITY Version 7 1 1 Double Take Availability for Hyper V User s Guide Notices Double Take Availability for Hyper V User s Guide Version 7 1 1 Monday October 26 2015 e Product Updates Check your service agreement to determine which updates and new releases you may be eligible for Product updates can be obtained from the support web site at http www VisionSolutions com SupportCentral e Sales lf you need maintenance renewal an upgrade license key or other sales assistance contact your reseller distributor or a Vision Solutions sales representative Contact information is available on the Vision Solutions Worldwide Locations and Contacts web page at http Awww VisionSolutions com Company Vision HA Locations aspx e Technical Support lf you need technical assistance you can contact CustomerCare All basic configurations outlined in the online documentation will be supported through CustomerCare Your technical support center is dependent on the reseller or distributor you purchased your product from and is identified on your service agreement If you do not have access to this agreement contact CustomerCare and they will direct you to the correct service provider To contact CustomerCare you will need your serial number and license key Contact information is available on the Vision Solutions CustomerCare web page at http Awww VisionSolutions com Support Support Overview aspx e Professional Services A
36. If you are using domain credentials for your Double Take servers and you change those credentials you will continue to receive a Windows Security pop up in the Double Take Console even if you enter correctly updated credentials in the pop up This is an unavoidable Windows WCF communication issue and you must update the credentials for the Double Take servers in the Double Take Console Manage Servers page in order to terminate the repeated pop ups Chapter 10 Managing servers 72 Inserting servers through Active Directory discovery You can insert servers using Active Directory discovery 1 Select Get Started from the toolbar Select Add servers and click Next Select the Automatic Discovery tab Click Discover to search Active Directory for servers running Double Take If you need to remove servers from the list of Servers to be added highlight a server and click Remove You can also remove all of them with the Remove All button When your list of Servers to be added is complete click OK 7 Because the Active Directory discovery uses pass through authentication you will need to update the credentials for each server from the Manage Servers page so that explicit credentials can be used when you go to create a job Click Provide Credentials and provide credentials for a user that has privileges to that server and is amember of the Double Take Admin security group Or E Sh D Importing and exporting servers from a server and
37. Main toolbar and right click menu The following options are available on the main toolbar of the Manage Servers page and the right click menu Some of the options are only available in the right click menu Some options are only available for a single selected server and others are available for multiple selected servers Add Servers Adds a new server This button leaves the Manage Servers page and opens the Add Servers page See Adding servers on page 72 Add Replication Appliance Adds a new replication appliance This option is only valid for agentless vSphere protection View Server Details Views detailed information about a server This button leaves the Manage Servers page and opens the View Server Details page See Viewing server details on page 75 e Remove Server m Removes the server from the console Provide Credentials A Changes the login credentials that the Double Take Console use to authenticate to a server This button opens the Provide Credentials dialog box where you can specify the new account information See Providing server credentials on page 74 You will remain on the Manage Servers page after updating the server credentials If your jobs use the same credentials make sure you also update the credentials for any active jobs on the server See Managing and controlling agentless Hyper V jobs on page 38 If you are using domain credentials for your Double Take servers and you change those credentials
38. Orphaned Files e Network Route e Snapshots e Compression e Bandwidth If you are protecting just one virtual machine you will also have the following sections e General e Replica Virtual Machine Location e Replica Virtual Machine Network Settings e Failover Monitor e Failover Identity If you are protecting more than one virtual machine you will have the Replica Virtual Machines section instead which is similar to the location section As you can see if you are protecting more than one virtual machine there are a few settings that you will not have access to during job creation In this case default values will be used You can modify the default values after the jobs have been created Go to each page identified below to see the options available for that section of the Set Options page After you have configured your options continue with the next step on page 33 General on page 17 Replica Virtual Machines on page 18 Replica Virtual Machine Location on page 19 Replica Virtual Machine Configuration on page 20 Replica Virtual Machine Network Settings on page 21 Failover Monitor on page 22 Failover Identity on page 24 Mirror Verify amp Orphaned Files on page 26 Network Route on page 29 Snapshots on page 30 Compression on page 31 Bandwidth on page 32 Chapter 3 Creating an agentless Hyper V job 16 General a General Job name l alpha to beta For the Job name specify a unique name for
39. Take on a cluster The Microsoft TechNet articles Failover Clusters and Installing and Upgrading on Cluster Nodes are two resources you can start with There are many other resources available on Chapter 2 Agentless Hyper V requirements 7 the Microsoft TechNet web site e Operating system versions Windows 2008 R2 2012 and 2012 R2 are the only supported versions of clustered Hyper V servers Windows 2008 R1 is not supported for clustering e Networking The following networking requirements apply to your cluster e You must have TCP IP connections between nodes e Multiple networks are recommended to isolate public and private traffic e The private network should be a unique subnet so that Double Take will not attempt to use an unreachable private network e Your network can contain direct LAN connections or VLAN technology e For Windows 2003 the cluster nodes must be on the same logical IP subnet e For Windows 2003 the maximum round trip latency between nodes should be no more than 2 second e Domain The cluster nodes must be members of the same domain e DNS Forward and reverse lookups must be implemented on the primary DNS server for the cluster name and individual nodes e Double Take disk queue Ensure that the disk queue is not on a Physical Disk resource e Volumes The source and target should have identical drive mappings e Licensing Each node in the cluster must have a valid Double Take Availability licens
40. V configured cluster To do this you will need to execute the altitude script located in the tools scripts csv directory on the product DVD or in the extracted web download files If you copy the altitude bat file to another location be sure and copy the two reg files as well To protect non CSV virtual machines on a CSV configured cluster run the following command on each node of the cluster altitude default ranean The default script will cause your cluster to go CSV host into redirected maintenance mode the next X fevel time the CSV is brought online taken offline or changes owning nodes If you change back to CSV virtual machines on your CSV configured cluster you will need to run the following command to change Double Take back to the correct configuration for CSV functionality altitude target The target script will keep your cluster from going into redirected maintenance mode If the host containing your source virtual machines is a CSV configuration the virtual disks must be on the same CSV volume Different CSV volumes for the source virtual disks is not supported Chapter 2 Agentless Hyper V requirements 11 Virtual Machine to Not Virtual Description Supported s ted Machine SPERTS Configuration You can protect a single virtual machine to a single standby replica virtual machine The replica virtual machine is not active while replication is occurring The replica virtual machine will become active afte
41. achine Selecting this option will remove the job and completely delete the replica virtual machine on the target If you no longer want to mirror and replicate data from the source to the target but still want to keep the replica of the source on the target select to keep the associated replica virtual machine You may want to use this option to relocate the virtual hard disks and create a new job between the original source and the new location Selecting this option will preserve the source replica on the target Provide Credentials an Changes the login credentials that the job which is on the target machine uses to authenticate to the servers in the job This button opens the Provide Credentials dialog box where you can specify the new account information and which servers you want to update See Providing server credentials on page 74 You will remain on the Manage Jobs page after updating the server credentials If your servers use the same credentials make sure you also update the credentials on the Manage Servers page so that the Double Take Console can authenticate to the servers in the console session See Managing servers on page 66 Chapter 6 Managing and controlling agentless Hyper V jobs 43 View Recent Activity gt Start gt Pause wa Stop r Displays the recent activity list for the selected job Highlight an activity in the list to display additional details about the activity Starts or resumes the selected
42. and or other countries Linux is a registered trademark of Linus Torvalds vSphere is a registered trademark of VMware All other trademarks are the property of their respective companies For a complete list of trademarks registered to other companies please visit that company s website 2015 Vision Solutions Inc All rights reserved Contents Chapter 1 Double Take Availability for Hyper V overview _ 0 0 20 c0 eee eee eee ee ee 4 Chapter 2 Agentless Hyper V requirements 2 0000000002 oe c cece cece eee cece nce eceeceeeeeeeees 5 Chapter 3 Creating an agentless Hyper V job _ 2 02 0 0 0000 00 coe eee cece cece ec eeeceeeeee 13 Chapter 4 Simulating protection 2 00 000 0 00 o cece c cece cece eee ceceeeeeceeceeceeeeeees 35 Chapter 5 Configuring Hyper V Pro tip integration for failover notification 36 Chapter 6 Managing and controlling agentless Hyper V jobs _ 2 0 00 22 e eee 38 Viewing agentless Hyper V job details 20 00 ooo eee eee eee 49 Validating an agentless Hyper V job 20 20 00 53 Editing an agentless Hyper V job 2 2 20 2c cece cc edb beeen eee 54 Viewing an agentless Hyper V job log 2 2 20 o eee eee cence eee eee 55 Chapter 7 Failing over agentless Hyper V jobs _ 0 2 0 00 57 Chapter 8 Reversing agentless Hyper V jobs 20 00 0000 0 00 0 c cece cece cece cece ec eeceeceeeeeeee 59 Chapter 9 Double Take Console 0 000
43. anization The servers displayed in the right pane depend on the server group folder selected in the left pane Every server in your console session is displayed when the All Servers group is selected If you have created and populated server groups under My Servers then only the servers in the selected group will displayed in the right pane I If you have uninstalled and reinstalled Double Take on a server you may see the server twice on the Manage Servers page because the reinstall assigns a new unique identifier to the server One of the servers the original version will show with the red X icon You can safely remove that server from the console Right pane display The following table identifies the columns displayed in the right pane of the Manage Servers page Column 1 Blank The first blank column indicates the machine type A Double Take source or target server which could be a physical server virtual machine or a cluster node Double Take source or target server which is a Windows cluster EE vmware server which could be a vCenter server or an ESX or ESXi host ps Double Take controller appliance B Double Take replication appliance 8 Double Take Reporting Service server Offline server which means the console cannot communicate with this machine D Server error which means the console can communicate with the machine but it cannot communicate with Double Take on it Column 2 Blank The second blank column indic
44. arget The default setting is 3 e Block target paths on connection Y ou can block writing to the replica source data located on the target This keeps the data from being changed outside of Double Take processing After failover any target paths that are blocked will be unblocked automatically during the failover process so that users can modify data on the target after failover During restoration the paths are automatically blocked again If you failover and failback without performing a restoration the target paths will remain unblocked Donotblock your target paths if you are protecting an entire server because system state data will not be able to be written to the target Be careful blocking target paths if you will be using Double Take snapshots You will have to unblock the paths before you can failover to a snapshot Additionally be careful when blocking target paths with backup software running on the target You will need to unblock the paths to allow backup software to take snapshots or update archive bits e Move deleted files to this folder tThis option allows you to save files that have been deleted by moving them to a different location on the target When a file deletion is replicated to the target instead of the file being deleted from the target the file is moved to the specified location This allows for easy recovery of those files if needed If you enable this option specify where you want to store the deleted
45. arget is in a bad state You only want snapshots of data that is in a good state Therefore you need to understand when the data is in a good or bad state e Mirror started e State Bad e Description Mirroring has started but is not complete The data on the source and target will not be synchronized until the mirror is complete e Automatic action taken for scheduled and automatic snapshots Scheduled and automatic snapshots will be delayed until the mirror is complete before taking a snapshot e User interaction required for manual snapshots Wait until the mirror is complete and the data is in a good state then take a manual snapshot Chapter 10 Managing servers 103 e Mirror stopped e State Bad e Description Mirroring has stopped without completing The data on the source and target will not be synchronized until the mirror is complete e Automatic action taken for scheduled and automatic snapshots Scheduled and automatic snapshots will be delayed until the mirror has been restarted and is complete before taking a snapshot e User interaction required for manual snapshots Restart the mirror wait until it is complete and the data is in a good state and then take a manual snapshot e Mirror complete e State Good e Description Because the mirror is complete the data on the source and target is synchronized Double Take will take a snapshot while the data is in a good state e Automatic action taken for
46. as been applied on the target Restore the data from the target back to the source If you want to discard the changes on the target you can remirror to resynchronize the source and target e Busy The source is low on memory causing a delay in getting the state of the data on the target e Not Loaded Double Take target functionality is not loaded on the target server This may be caused by a license key error e Unknown The console cannot determine the status Mirror remaining The total number of mirror bytes that are remaining to be sent from the source to the target Mirror skipped The total number of bytes that have been skipped when performing a difference These bytes are skipped because the data is not different on the source and target Replication queue The total number of replication bytes in the source queue Disk queue The amount of disk space being used to queue data on the source Bytes sent The total number of mirror and replication bytes that have been transmitted to the target Chapter 6 Managing and controlling agentless Hyper V jobs 41 Bytes sent compressed The total number of compressed mirror and replication bytes that have been transmitted to the target If compression is disabled this statistic will be the same as Bytes sent Connected since The date and time indicating when the current job was started Recent activity Displays the most recent activity for the selected job along with an i
47. ates the security level Chapter 10 Managing servers 66 Server Activity Version Processing The console is attempting to communicate with machine Administrator access This level grants full control Monitor only access This level grants monitoring privileges only No security access This level does not allow monitoring or control The name or IP address of the server If you have specified a reserved IP address it will be displayed in parenthesis There are many different Activity messages that keep you informed of the server activity Most of the activity messages are informational and do not require any administrator interaction If you see error messages check the server details See Viewing server details on page 75 The product version information Licensing Status Product License Key Serial Number The status of the license on the server If your license is expired any jobs using that server will be in an error state The Double Take products licensed for the server or the Double Take role for the server The license keys associated with the products licensed for the server If your license is not valid for the operating system on your server the license key will be identified as Invalid License Key There will be no license key listed for those servers that are not licensed like a VMware server The serial number associated with the license key Chapter 10 Managing servers 67
48. b e Scheduled This snapshot was taken as part of a periodic snapshot e Deferred This snapshot was taken as part of a periodic snapshot although it did not occur at the specified interval because the job between the source and target was not in a good state e Manual This snapshot was taken manually by a user 3 Click Take Snapshot to create a new snapshot for the job If there is a snapshot that you no longer need highlight it in the list and click Delete 5 When you have completed your snapshot management click Close gt Ifyou have already failed over the failover process will remove any Double Take snapshots from the list You will need to manage them manually using VSS See your VSS documentation for more details Snapshot states For some job types when Double Take transitions from a good state to a bad state it will automatically attempt to take a snapshot of the data before it leaves the good state and enters the bad state For example if your data is in a good state and you start a mirror before the mirror is started Double Take will automatically take a snapshot of the target In the event the mirror fails to complete you will have a snapshot of the data on the target when it was in its last good state Only one automatic snapshot per job is maintained on the target When an automatic snapshot is taken it replaces any previous automatic snapshots A snapshot may not necessarily be useful if the data on the t
49. cating that a TCP IP socket is not present when the job is waiting on transmit options or if the transmission has been stopped This field will maintain the date and time indicating that a TCP IP socket is present when transmission has been paused Additional information Depending on the current state of your job you may see additional information displayed to keep you informed about the progress and status of your job If there is no additional information you will see None displayed Chapter 6 Managing and controlling agentless Hyper V jobs 50 Mirror status Calculating The amount of data to be mirrored is being calculated In Progress Data is currently being mirrored Waiting Mirroring is complete but data is still being written to the target Idle Data is not being mirrored Paused Mirroring has been paused Stopped Mirroring has been stopped Removing Orphans Orphan files on the target are being removed or deleted depending on the configuration Verifying Data is being verified between the source and target Unknown The console cannot determine the status Mirror percent complete The percentage of the mirror that has been completed Mirror remaining The total number of mirror bytes that are remaining to be sent from the source to the target Mirror skipped The total number of bytes that have been skipped when performing a difference These bytes are skipped because the data is not differen
50. ce If you do not use this service in your environment contact technical support e Windows firewall lIf you have Windows firewall enabled on your servers there are two requirements for the Windows firewall configuration e The Double Take installation program will automatically attempt to configure ports 6320 6325 and 6326 for Double Take If you cancel this step you will have to configure the ports manually e If you are using the Double Take Console to push installations out to your servers you will have to open firewall ports for WMI Windows Management Instrumentation which uses RPC Remote Procedure Call By default RPC will use ports at random above 1024 and these ports must be open on your firewall RPC ports can be configured to a specific range by specific registry changes and a reboot See the Microsoft Knowledge Base article 154596 for instructions Additionally you will need to open firewall ports for SMB server message block communications which uses ports 135 139 and port 445 and you will need to open File and Printer Sharing As an alternative you can disable the Windows firewall temporarily until the push installations are complete e Protocols and networking Y our servers must meet the following protocol and networking requirements e Your servers must have TCP IP with static IP addressing e IPv4 is the only supported version Chapter 2 Agentless Hyper V requirements 6 e The following requirements
51. con indicating the success or failure of the last initiated activity Click the link to see a list of recent activities for the selected job You can highlight an activity in the list to display additional details about the activity Additional information Depending on the current state of your job you may see additional information displayed to keep you informed about the progress and status of your job If there is no additional information you will see None displayed Chapter 6 Managing and controlling agentless Hyper V jobs 42 Job controls You can control your job through the toolbar buttons available on the Manage jobs page If you select multiple jobs some of the controls will apply only to the first selected job while others will apply to all of the selected jobs For example View Job Details will only show details for the first selected job while Stop will stop protection for all of the selected jobs If you want to control just one job you can also right click on that job and access the controls from the pop up menu Create a New Job 9 This button leaves the Manage Jobs page and opens the Get Started page View Job Details Ye This button leaves the Manage Jobs page and opens the View Job Details page Delete w Stops if running and deletes the selected jobs If you no longer want to protect the source and no longer need the replica of the source on the target select to delete the associated replica virtual m
52. cted bandwidth This is the maximum amount of data that will be transmitted per second If desired modify the bandwidth using a bytes per second value The minimum limit should be 3500 bytes per second e Use scheduled limits Double Take will transmit data using a dynamic bandwidth based on the schedule you configure Bandwidth will not be limited during unscheduled times e New Click New to create a new scheduled bandwidth limit Specify the following information e Daytime entry Select this option if the start and end times of the bandwidth window occur in the same day between 12 01 AM and midnight The start time must occur before the end time e Overnight entry Select this option if the bandwidth window begins on one day and continues past midnight into the next day The start time must be later than the end time for example 6 PM to 6 AM e Day Enter the day on which the bandwidth limiting should occur You can pick a specific day of the week Weekdays to have the limiting occur Monday Chapter 3 Creating an agentless Hyper V job 32 through Friday Weekends to have the limiting occur Saturday and Sunday or Every day to have the limiting repeat on all days of the week e Start time Enter the time to begin bandwidth limiting e End time Enter the time to end bandwidth limiting e Preset bandwidth Select a bandwidth limit rate from the common bandwidth limit values The Bandwidth field will automatically updat
53. d by a black exclamation point inside a yellow triangle A successful validation is designated by a white checkmark inside a green circle You can sort the list by the icon to see errors warnings or successful validations together Click on any of the validation items to see details You must correct any errors before you can continue Depending on the error you may be able to click Fix or Fix All and let Double Take correct the problem for you For those errors that Double Take cannot correct automatically you will need to modify the source or target to correct the error or you can select a different target You must revalidate the selected servers by clicking Recheck until the validation check passes without errors Before a job is created the results of the validation checks are logged to the Double Take Management Service log on the target After a job is created the results of the validation checks are logged to the job log See the Double Take Reference Guide for details on the various Double Take log files 13 Once your servers have passed validation and you are ready to establish protection click Finish and you will automatically be taken to the Manage Jobs page Chapter 3 Creating an agentless Hyper V job 33 Once protection is established Double Take monitors the virtual disks of the protected virtual machine for changes to the disk layout If a new virtual hard disk is added to the virtual machine the protection job
54. e key e Resource registration In some cases the Double Take cluster resources may not be registered automatically when Double Take is installed You can manually register the resources by running DTResUtility exe which is installed in the Windows Cluster directory e Third party storage Third party storage resources are not supported e Upgrades If you are using a cluster configuration you cannot upgrade You must delete the existing job upgrade all of your nodes and then re create the job e Snapshots Double Take uses the Microsoft Volume Shadow Copy service VSS for snapshot capabilities You can take and failover to Double Take snapshots using an agentless Hyper V job To use this functionality your servers must meet the following requirements e Snapshot location Snapshots are taken at the volume level and stored on the target so be sure that you have enough space on your target for snapshots e Double Take installation location lIn order to enable Double Take snapshots Double Take must be installed on the system drive If Double Take is not installed on the system drive snapshots will be disabled when enabling protection e Snapshot limitations Sometimes taking a snapshot may not be possible For example there may not be enough disk space to create and store the snapshot or maybe the target is too low on memory If a snapshot fails an Event message and a Double Take log message are both created and logged
55. e local on your console machine or a UNC path e Windows Specify the parent directory where the Windows installation file is located The default location is where the Double Take Console is installed which is Program Files Vision Solutions Double Take The console will automatically use the i386 subdirectory for 32 bit installations and the x64 subdirectory for 64 bit installations These subdirectories are automatically populated with the Windows installation files when you installed the console If you want to use a different location you must copy the i386 or x64 folder and its installation file to the different parent directory that you specify Chapter 9 Double Take Console 64 e Linux For Linux servers you have two choices e f you copied the Linux installation files from your download to your Double Take Console installation location you must make sure they are in a Linux subdirectory under the parent directory you specified for Location of install folders Copy the Linux deb or rpm files from your download to the Linux subdirectory Make sure you only have a single version of the Linux installation files in that location The push installation cannot determine which version to install if there are multiple versions in the Linux subdirectory e If you have already deployed your Linux virtual recovery appliance specify the UNC path to the installers share on the appliance For example if your appliance is called DTA
56. e move deleted files setting Alternate data streams that are deleted on the source will not be moved on the target Encrypted files that are deleted on the source will only be moved on the target if the move location is on the same volume as the copy of the source data on the target Compressed and sparse files that are deleted on the source will be moved on the target although the compression and sparse flags will only be retained on the target if the move location is on the same volume as the copy of the source data on the target Chapter 10 Managing servers 92 E mail notification configuration You can email Double Take event messages to specific addresses using an SMTP mail server SSL or TLS are not supported The subject of the e mail will contain an optional prefix the server name where the message was logged the message ID and the severity level information warning or error The text of the event message will be displayed in the body of the e mail message C E mail Notification V Enable e mail notifications Test E mail server SMTP MailServer F Log on to e mail server User name administrator Password eessesess0 sts lt s From address admin domain com Cc Send to admin domain com ITSupport domain com Subject prefix Double Take Notification V Add event description to subject Include these events _ Information Iv Warming V Error Exclude th
57. e target no longer matches the data on the source because of a failover This does not necessarily mean that the data on the target is bad e Automatic action taken for scheduled and automatic snapshots Scheduled and automatic snapshots will be delayed until a restore is completed or the restore required state is overruled by a mirror Once the restoration or mirror is complete automatic and scheduled snapshots will occur normally e User interaction required for manual snapshots Restore the target data back to the source or override the restore required state by performing a mirror Once the restoration or mirror is complete manual snapshots can be taken normally e Snapshot reverted e State Good or bad e Description The data on the target no longer matches the data on the source because a snapshot has been applied on the target This does not necessarily mean that the data on the target is bad e Automatic action taken for scheduled and automatic snapshots Scheduled and automatic snapshots will be delayed until a restore is completed or the snapshot reverted state is overruled by a mirror Once the restoration or mirror is complete automatic and scheduled snapshots will occur normally e User interaction required for manual snapshots Restore the target data back to the source or override the snapshot reverted state by performing a mirror Once the restoration or mirror is complete manual snapshots can be taken normally e Restore
58. e to the bytes per second value for your select bandwidth e Bandwidth If desired modify the bandwidth using a bytes per second value The minimum limit should be 3500 bytes per second e Edit Click Edit to modify an existing scheduled bandwidth limit e Delete Click Delete to remove a scheduled bandwidth limit _ Ifyou change your job option from Use scheduled limits to Do not limit bandwidth or Use a fixed limit any schedule that you created will be preserved That schedule will be reused if you change your job option back to Use scheduled limits You can manually override a schedule after a job is established by selecting Other Job Options Set Bandwidth If you select No bandwidth limit or Fixed bandwidth limit that manual override will be used until you go back to your schedule by selecting Other Job Options Set Bandwidth Scheduled bandwidth limit For example if your job is configured to use a daytime limit you would be limited during the day but not at night But if you override that your override setting will continue both day and night until you go back to your schedule See the Managing and controlling jobs section for your job type for more information on the Other Job Options 11 Click Next to continue 12 Double Take validates that your source and target are compatible The Summary page displays your options and validation items Errors are designated by a white X inside a red circle Warnings are designate
59. elect Add from disk You can disregard any messages indicating the management pack may have dependencies that cannot be located 6 Navigate to the location of the Double Take Hyper V Management Pack file that you copied or downloaded and follow the steps in the Management Pack Import Wizard See the SCOM documentation for complete details 7 See Creating an agentless Hyper V job on page 13 to configure failover monitoring and manual intervention 8 Inthe event your Hyper V source fails you will receive a PRO tip alert Chapter 5 Configuring Hyper V Pro tip integration for failover notification 36 g PRO Tips BB alpha domain com a Double Take Availability for Hyper V Failover Pending A Double Take Availability for Hyper V job has entered the failover pending state More Information Host Summary Name Host group Average CPU Memory Storage alpha domain com All Hosts IV Show this window when new PRO Tips are created 9 Youcan Implement the Pro tip to start failover or you can Dismiss it if you do not want to failover Chapter 5 Configuring Hyper V Pro tip integration for failover notification 37 Managing and controlling agentless Hyper V jobs Click Manage Jobs from the main Double Take Console toolbar The Manage Jobs page allows you to view status information about your jobs You can also control your jobs from this page The jobs displayed in the right pane depend on
60. ended for databases Verification Options Enable scheduled verification General Options IM Calculate size of protected data upon connection Delete orphaned files e Mirror Options Choose a comparison method and whether to mirror the entire file or only the bytes that differ in each file Do not compare files Send the entire file Double Take will not perform any comparisons between the files on the source and target All files will be mirrored to the target sending the entire file This is equivalent to selecting the mirror all files option prior to Double Take version 7 1 e Compare file attributes Send the entire file Double Take will compare file attributes and will mirror those files that have different attributes sending the entire file This is similar to selecting the mirror different files and the only if source is newer options prior to Double Take version 7 1 e Compare file attributes Send the attributes and bytes that differ Double Take will compare file attributes and will mirror only the attributes and bytes that are different This is equivalent to selecting the mirror different files only if source is newer and use block checksum options prior to Double Take version 7 1 e Compare file attributes and data Send the attributes and bytes that differ Double Take will compare file attributes and the file data and will mirror only the attributes and bytes that are different This is
61. erver There are many different Status messages that keep you informed of the server activity Most of the status messages are informational and do not require any administrator interaction If you see error messages check the rest of the server details There are many different Activity messages that keep you informed of the server activity Most of the activity messages are informational and do not require any administrator interaction If you see error messages check the rest of the server details The IP address and port the server is using for communcations You will also see the Double Take protocol being used to communicate with server The protocol will be XML web services protocol for servers running Double Take version 5 2 or later or Legacy protocol for servers running version 5 1 or earlier The product version information Chapter 10 Managing servers 75 Access User name Licensing Source jobs Target jobs The security level granted to the specified user The user account used to access the server Licensing information for the server A list of any jobs from this server Double clicking on a job in this list will automatically open the View Job Details page A list of any jobs to this server Double clicking on a job in this list will automatically open the View Job Details page Chapter 10 Managing servers 76 Editing server properties Highlight a server on the Manage Servers page and click V
62. erver Core if you installed Double Take while running in full operating system mode In any case you cannot run the Double Take Console on Server Core Chapter 9 Double Take Console 62 Console options There are several options that you can set that are specific to the Double Take Console To access these console options select Options from the toolbar e Monitoring This section is used to determine how the console monitors your Double Take servers e Monitoring interval Specifies how often in seconds the console refreshes the monitoring data The servers will be polled at the specified interval for information to refresh the console e Automatic retry This option will have the console automatically retry server login credentials after the specified retry interval if the server login credentials are not accepted Keep in mind the following caveats when using this option e This is only for server credentials not job credentials e A set of credentials provided for or used by multiple servers will not be retried for the specified retry interval on any server if it fails on any of the servers using it e Verify your environment s security policy when using this option Check your policies for failed login lock outs and resets For example if your policy is to reset the failed login attempt count after 30 minutes set this auto retry option to the same or a slightly larger value as the 30 minute security policy to decrea
63. ervice is stopped and restarted there could have been data in the target queue when the service was stopped To prevent any loss of data the Double Take service will attempt to persist to disk important target connection information such as the source and target IP addresses for the connection various target queue information the last acknowledged operation data in memory moved to disk and so on before the service is stopped If Double Take is able to successfully persist this information when the Double Take service on the target is restarted Double Take will pick up where it left off without requiring an auto disconnect auto reconnect or auto remirror If Double Take cannot successfully persist this information prior to the restart for example a server crash or power failure where the target service cannot shutdown gracefully the source will auto reconnect when the target is available and if configured Double Take will auto remirror The remirror re establishes the target baseline to ensure data integrity so disabling auto remirror is not advised Chapter 10 Managing servers 82 Ifyou are experiencing frequent auto disconnects you may want to increase the amount of disk space on the volume where the Double Take queue is located or move the disk queue to a larger volume If you have manually changed data on the target for example if you were testing data on the target Double Take is unaware of the target data changes You m
64. es that Double Take transmits The default setting is 65536 bytes You may want to consider increasing this value in a high latency environment greater than 100 ms response times or if your data set contains mainly larger files like databases e Calculate size of protected data upon connection Specify if you want Double Take to determine the mirroring percentage calculation based on the amount of data being protected If you enable this option the calculation will begin when mirroring begins For the initial mirror the percentage will display after the calculation is complete adjusting to the amount of the mirror that has completed during the time it took to complete the calculation Subsequent mirrors will initially use the last calculated size and display an approximate percentage Once the calculation is complete the percentage will automatically adjust down or up to indicate the amount that has been completed Disabling calculation will result in the mirror status not showing the percentage complete or the number of bytes remaining to be mirrored The calculated amount of protected data may be slightly off if your data set contains compressed or sparse files Do not disable this option for any of the following job types e Full server jobs e Full server to Hyper V jobs e V to Hyper V jobs e Full server to ESX jobs e V to ESX jobs The calculation time is when the source generates a hard link report that the target will use to
65. es for the diagnostics to finish processing After it is complete a zip file containing the information gathered will be created The file name is based on the machine name Establish a protection job noting the following caveats e When selecting your target select the Diagnostics job checkbox instead of a target server e When you get to the Set Options page in the workflow some options for your selected job type will not be displayed because they are not applicable For example target specific selections will not be displayed because there is no actual target with the TDU Once you have established your job you should ideally let it run for several days to gather accurate data for your network and source server usage The simulation data will be logged to the Double Take statistics file See the Reference Guide for details on DTStat 4 After your simulation is complete repeat step 1 to gather diagnostic again Chapter 4 Simulating protection 35 Configuring Hyper V Pro tip integration for failover notification Microsoft System Center Virtual Machine Manager SCVMM provides centralized administration for your Hyper V virtual machines Within SCVMM Performance and Resource Optimization PRO provides a basic set of monitors that can alert you to situations where you may want or need to modify a virtual machine configuration in order to optimize the host or virtual machine These alerts called PRO tips recommend actions for you
66. ese event IDs Enter event IDs and event ID ranges separated by commas For example 4000 4002 4010 4020 e Enable e mail notification This option enables the e mail notification feature Any specified notification settings will be retained if this option is disabled e E mail server Specify the name of your SMTP mail server e Log on to e mail server If your SMTP server requires authentication enable this option and specify the User name and Password to be used for authentication Your SMTP server must support the LOGIN authentication method to use this feature If your server supports a different authentication method or does not support authentication you may need to add the Double Take server as an authorized host for relaying e mail messages This option is not necessary if you are sending exclusively to e mail addresses that the SMTP server is responsible for e From address Specify the e mail address that you want to appear in the From field of each Double Take e mail message The address is limited to 256 characters Chapter 10 Managing servers 93 e Send to Specify the e mail addresses that each Double Take e mail message should be sent to Enter the addresses as a comma or semicolon separated list Each address is limited to 256 characters You can add up to 256 e mail addresses e Subject prefix and Add event description to subject The subject of each e mail notification will be in the format Subject Prefix Server
67. f the hardware does not support reliable communications shorter times can lead to premature failover Consider a longer amount of time for machines on slower networks or on a server that is not transaction critical For example failover would not be necessary in the case of a server restart e Consecutive failures Specify how many attempts the target will make to contact the source before the source is considered failed For example if you have this option set to 20 and your source fails to respond to the target 20 times in a row this will be considered a failure e Monitor on this interval Specify in hours minutes seconds how long to wait between attempts to contact the source to confirm it is online This means that after a response success or failure is received from the source Double Take will wait the specified interval time before contacting the source again If you set the interval to 00 00 00 then a new check will be initiated immediately after the response is received If you choose Total time to failure do not specify a longer interval than failure time or your server will be considered failed during the interval period If you choose Consecutive failures your failure time is calculated in one of two ways e ICMP enabled lIf ICMP is enabled on your host when the job is created your failure time is calculated by the length of time it takes your host to respond to an ICMP host ping plus the length of time it takes you
68. files Chapter 10 Managing servers 91 PA If you are moving deleted files on the target and you have orphan files configured for removal which is the default setting for most job types do not move the deleted files to a location inside the replica data on the target The deleted files that are moved will then be deleted by the orphan file functionality e Remove deleted files after this number of days lf you are moving deleted files you can specify a length of time in days to maintain the moved files A moved file that is older than the specified number of days will be deleted Double Take checks for moved files that should be deleted once daily at 8 PM Only the date not the time of the file is considered when moved files are deleted For example if you specify to delete moved files after 30 days any file that is 31 days old will be deleted Because the criteria is based on days and not time a file that will be deleted could have been moved anytime between 12 01 AM and 11 59 PM 31 days ago If deleted files are moved for long enough the potential exists for the target to run out of space In that case you can manually delete files from the target move location to free space Do not include the Recycler directory in your job if you are moving deleted files If the Recycler directory is included Double Take will see an incoming file deletion as a move operation to the Recycle Bin and the file will not be moved as indicated in th
69. g after the load is reduced Accordingly use a standalone disk mirrored RAID 1 or non parity striped RAID 0 RAID set and allocate more I O adapter cache memory to writes for best performance A RAID 5 array will not perform as well as a Chapter 10 Managing servers 86 mirrored or non parity striped set because writing toa RAID 5 array incurs the overhead of generating and writing parity data RAID 5 write performance can be up to 50 less than the write performance of a single disk depending on the adapter and disk rA Scanning the Double Take queue files for viruses can cause unexpected results If anti virus software detects a virus in a queue file and deletes or moves it data integrity on the target cannot be guaranteed As long as you have your anti virus software configured to protect the actual production data the anti virus software can clean delete or move an infected file and the clean delete or move will be replicated to the target This will keep the target from becoming infected and will not impact the Double Take queues Amount of system memory to use This is the maximum amount of Windows system memory in MB that Double Take will use When this limit is reached queuing to disk will be triggered The minimum amount of system memory is 512 MB The maximum amount is dependent on the server hardware and operating system If you set this value lower Double Take will use less system memory but you will queue to disk so
70. ge Jobs page where the Filter Jobs with warnings will automatically be applied e View all jobs Select this link to go to the Manage Jobs page and view all jobs At the bottom of the Double Take Console you will see a status bar At the right side you will find links for Jobs with warnings and Jobs with errors This lets you see quickly no matter which page of the console you are on if you have any jobs that need your attention Select this link to go to the Manage Jobs page where the appropriate Filter Jobs with warnings or Filter Jobs with errors will automatically be applied Chapter 9 Double Take Console 61 Double Take Console requirements You must meet the following requirements for the Double Take Console e Operating system The Double Take Console can be run from a Windows source or target It can also be run from a 32 bit or 64 bit physical or virtual machine running Windows 8 Windows 7 Windows Vista or Windows XP Service Pack 2 or later e Microsoft _NET Framework Microsoft _NET Framework version 4 0 Update 3 or later is required The full NET 4 0 3 is required not just the Client Profile e Screen resolution For best results use a 1024x768 or higher screen resolution The Double Take installation prohibits the console from being installed on Server Core Because Windows 2012 allows you to switch back and forth between Server Core and a full installation you may have the console files available on S
71. gement Service Management Service Management Service Management Service Management Service Management Service Management Service Management Service Management Service Management Service Management Service Management Service Management Service Management Service Management Service Management Service Management Service Management Service 3 23 2012 1 34 06 PM Connection request from IP address 192 168 1 6 Double Take 3 23 2012 1 34 06 PM Connection from 192 168 1 6 6320 is a server to server connection Double Take 3 23 2012 1 34 19 PM Adding Connection Id 289637c2 a75c 4c47 8249 4ebbac450fib ReplicationSetName Management Service 3 23 2012 1 34 19 PM RepSet Modified FilesAndFolders_7d16d3423c09467eaf42efd b5279833 Double Take 3 23 2012 1 34 19 PM Bandwidth limit to SQL2 192 168 1 6 6320 has changed and is now Unlimited Double Take 3 23 2012 1 34 19 PM Originator Attempting SQL2 ip 192 168 1 6 6320 Double Take 3 23 2012 1 34 19 PM Make CAckQueueHandlerTargetOpOrdering Double Take 3 23 2012 1 34 19 PM Connected to SQL2 IP address ip 192 168 1 6 6320 Double Take 3 23 2012 1 34 19 PM StartReplicationHandler set state to RUNNING Double Take 3 23 2012 1 34 19 PM Replication STARTED Double Take This button pauses the addition and scrolling of new messages in the window This is only for the Server logs window The messages are still logged to their respective files on the server Chapter 10 Managing servers 101 Copy
72. group configuration file You can share the console server and group configuration between machines that have the Double Take Console installed The console server configuration includes the server group configuration server name server communications ports and other internal processing information To export a server and group configuration file select File Export Servers Specify a file name and click Save After the configuration file is exported you can import it to another console When you are importing a console server and group configuration file from another console you will not lose or overwrite any servers that already exist in the console For example if you have server alpha in your console and you insert a server configuration file that contains servers alpha and beta only the server beta will be inserted Existing group names will not be merged so you may see duplicate server groups that you will have to manually update as desired To import a server and group configuration file select File Import Servers Locate the console configuration file saved from the other machine and click Open Chapter 10 Managing servers 73 Providing server credentials To update the security credentials used for a specific server select Provide Credentials from the toolbar on the Manage Servers page When prompted specify the User name Password and Domain of the account you want to use for this server Click OK to save the changes
73. he list of events are displayed in the top pane of the page although the description is limited When you highlight an event the event details including the full description are displayed in the bottom pane of the page e Severity An icon and or text that classifies the event such as Error Warning Information Success Audit or Failure Audit e Time The date and time the event occurred e ID An identification number to help identify and track event messages e Source The component that logged the event e Description The event details You can filter the events displayed by using the Filter drop down list or the View Warning Events and View Error Events toolbar buttons To clear a filter select All events in the Filter drop down list See the Reference Guide for a complete list of Windows event messages Chapter 10 Managing servers 100 Viewing server logs You can view the engine and Management Service logs using either of these two methods e Onthe Manage Servers page highlight a server in the list and click View Server Logs from the toolbar e On the Manage Jobs page right click a job and select View Logs Select either the source server log or the target server log Separate logging windows allow you to continue working in the Double Take Console while monitoring log messages You can open multiple logging windows for multiple servers When the Double Take Console is closed all logging windows will automatical
74. he owner name with the file If that user exists on the target then the SID associated with the user will be applied to the target file ownership If that user does not exist on the target then the ownership will be unknown By default this option is disabled e Domain security model lIf you are using a Windows domain security model by assigning users at the domain level each user is assigned a security ID SID at the domain level When Double Take replicates a file to the target the SID is also replicated Since a user will have the same SID on the source and target the user will be able to access the file from the target Therefore this option is not necessary e Local security model If you are using a Windows local security model by assigning users at the local level users that appear on multiple machine will each have different SIDs you will need to enable this feature so that users can access the data on the target If you do not enable this feature with a local security model after a Double Take file and SID is replicated a local user will not be able to access the file because the user s SID on the target machine is different from the SID that was replicated from the source machine If you enable this option make sure that the same groups and users exist on the target as they do on the source Enabling this option may have an impact on the rate at which Double Take can commit data on the target File security attributes are
75. hose data you want to protect 4 Current Servers Servers server Version Product k 7 alpha 7 1 0 798 0 Double Take Availability for Windows Premium Edition V beta 7 1 0 798 0 Double Take Availability for Windows Premium Edition v Find a New Server e Current Servers This list contains the servers currently available in your console session Servers that are not licensed for the workflow you have selected will be filtered out of the list Select your source server from the list e Find a New Server lIf the server you need is not in the Current Servers list click the Find a New Server heading From here you can specify a server along with credentials for logging in to the server If necessary you can click Browse to select a server froma network drill down list _ Ifyou enter the source server s fully qualified domain name the Double Take Console will resolve the entry to the server short name If that short name resides in two different domains this could result in name resolution issues In this case enter the IP address of the server Chapter 3 Creating an agentless Hyper V job 13 When specifying credentials for a new server specify a user that is a member of the local Double Take Admin and local administrator security groups The user must also have administrative rights for Microsoft Hyper V 5 Click Next to continue 6 Choose the type of workload that you want to protect Under Server Workloads in
76. icrosoft DNS records your environment must meet the following requirements e The source and target servers must be in the same domain e The target must have WMI DCOM connectivity to any DNS server that you have configured to be updated e Each server s network adapter must have the DNS suffix defined and the primary DNS suffix must be the same on the source and target You can set the DNS suffix in the network adapters advanced TCP IP settings or you can set the DNS suffix on the computer name See the documentation for your specific operating system for details on configuring the DNS suffix e lf you are using a DNS reverse lookup zone then the forward zone must be Active Directory integrated Double Take is unable to determine if this integration exists and therefore cannot warn you during job creation if it doesn t exist The zone should be set for secure only updates to allow for DNS record locking DNS updates are not supported for Server Core servers or NAT environments e Reverse lookup zone If you are using a DNS reverse lookup Zone then it must be Active Directory integrated Double Take is unable to determine if this integration exists and therefore cannot warn you during job creation if it doesn t exist e Clusters Make sure your cluster meets the following requirements e Best practices You should carefully review Microsoft documentation and resources for properly configuring your cluster before implementing Double
77. idden from view when the window size is reduced Chapter 10 Managing servers 71 Adding servers The first time you start the console the Manage Servers page is empty In order to protect and monitor your servers you must insert your servers and or appliances in the console For some jobs you can insert servers and appliances during job creation or you have three other methods for inserting servers into the console Inserting servers manually 1 2 3 o Select Get Started from the toolbar Select Add servers and click Next On the Manual Entry tab specify the server information e Server This is the name or IP address of the server or appliance to be added to the console See the following NAT configuration section if you have a NAT environment e User name For a server specify a user that is a member of the Double Take Admin or Double Take Monitors security group on the server e Password Specify the password associated with the User name you entered e Domain lIf you are working in a domain environment specify the Domain After you have specified the server or appliance information click Add Repeat steps 3 and 4 for any other servers or appliances you want to add If you need to remove servers or appliances from the list of Servers to be added highlight a server and click Remove You can also remove all of them with the Remove All button When your list of Servers to be added is complete click OK Pi
78. iew Server Details from the toolbar Under Tasks select Edit server properties The Edit Server Properties page allows you to view and edit properties for that server Click on a heading on the Edit Server Properties page to expand or collapse a section of properties General server properties on page 78 Identifies the server Server licensing on page 79 Views adds and removes license keys Server setup properties on page 81 Indicates how the server will act on startup and shutdown Double Take queue on page 85 Configures the Double Take queues Source server properties on page 89 Configures the source server Target server properties on page 91 Configures the target server E mail notification configuration on page 93 Configures e mail notification Script credentials on page 95 Specifies credentials to be used when executing custom scripts during mirroring or failover Log file properties on page 96 Configures log files ri Server properties cannot be edited on a cluster Chapter 10 Managing servers 77 General server properties The general server properties identify the server A General Default address Port m 6320 a Encrypt network data Automatic retry Retr this interval minutes p an zij e Default address On a server with multiple NICs you can specify which address Double Take traffic will use It can also be used on servers with multiple IP addresses on a single NIC If
79. ing an agentless Hyper V job 29 Snapshots Aj Snapshots V Enable scheduled snapshots Take snapshots on this interval 2 a Days ai Begin immediately C Begin at this time 10 29 49 AM A snapshot is an image of the source replica data on the target taken at a single point in time You can failover to a snapshot However you cannot access the snapshot in VSS to recover specific files or folders Turn on Enable scheduled snapshots if you want Double Take to take snapshots automatically at set intervals e Take snapshots on this interval Specify the interval in days hours or minutes for taking snapshots e Begin immediately Select this option if you want to start taking snapshots immediately after the protection job is established e Begin at this time Select this option if you want to start taking snapshots at a later date and time Specify the date and time parameters to indicate when you want to start rA See Managing snapshots on page 103 for details on taking manual snapshots and deleting snapshots You may want to set the size limit on how much space snapshots can use See your VSS documentation for more details If your target is a cluster snapshots will be lost when node ownership changes However Double Take will take an automatic snapshot after a new node becomes owner so there is always at least one snapshot you can failover to Chapter 3 Creating an agentless Hyper V job 30 Co
80. ion on your source select this option Do not mirror Double Take will not perform any comparisons between the files on the source and target No files will be mirrored to the target e Time allowed to complete shutdown operations This setting indicates the amount of time in seconds for the Double Take service to wait prior to completing a shutdown so that Double Take can persist data on the target in an attempt to avoid a remirror when the target comes back online A timeout of zero 0 indicates waiting indefinitely and any other number indicates the number of seconds The timeout setting only controls the service shutdown caused by Double Take It does not control the service shutdown through a reboot or from the Service Control Manager Chapter 10 Managing servers 84 Double Take queue During the Double Take installation you identified the amount of disk space that can be used for Double Take queuing Queuing to disk allows Double Take to accommodate high volume processing that might otherwise exhaust system memory For example on the source this may occur if the data is changing faster than it can be transmitted to the target or on the target a locked file might cause processing to back up Double Take Queuing Diagram The following diagram will help you understand how queuing works Each numbered step is described after the diagram B B R T Source Target 1 If data cannot immediately be trans
81. irror only changed files when source reboots If enabled Double Take will use the Double Take driver change journal and the Windows change journal NTFS or ReFS to track file changes If the source is rebooted only the files identified in the change journals will be remirrored to the target This setting helps improve mirror times If this option is enabled but the change journals cannot be used or if this option is disabled the selected choice for Behavior when automatically remirroring will be used to remirror changes after the source reboots Ifyou reboot your source into safe mode and changes are made to the protected data and then the source is rebooted normally the Double Take driver change journal will try but not be able to synchronize the source and target correctly because it was not loaded in safe mode Therefore you should manually start a difference mirror Automatically reconnect during source initialization Disk queues are user configurable and can be extensive but they are limited If the amount of disk space specified for disk queuing is met additional data would not be added to the queue and data would be lost To avoid any data loss Double Take will automatically disconnect jobs when necessary If this option is enabled Double Take will automatically reconnect any jobs that it automatically disconnected These processes are called auto disconnect and auto reconnect and can happen in the following scenarios Chapter
82. job type name This job is an Agentless Hyper V job Fora complete list of all job type names press F 1 to view the Double Take Console online help Health J The job isin a healthy state aA The job is in a warning state x The job is in an error state The job is in an unknown state Activity There are many different Activity messages that keep you informed of the job activity Most of the activity messages are informational and do not require any administrator interaction If you see error messages check the rest of the job details Connection ID The incremental counter used to number connections The number is incremented when a connection is created It is also incremented by internal actions such as an auto disconnect and auto reconnect The lowest available number as connections are created stopped deleted and so on will always be used The counter is reset to one each time the Double Take service is restarted Transmit mode e Active Data is being transmitted to the target e Paused Data transmission has been paused e Scheduled Data transmission is waiting on schedule criteria e Stopped Data is not being transmitted to the target e Error tThere is a transmission error e Unknown The console cannot determine the status Chapter 6 Managing and controlling agentless Hyper V jobs 49 Target data state Target route OK The data on the target is in a good state Mirroring The target is in the
83. jobs If you have previously stopped protection the job will restart mirroring and replication If you have previously paused protection the job will continue mirroring and replication from where it left off as long as the Double Take queue was not exhausted during the time the job was paused If the Double Take queue was exhausted during the time the job was paused the job will restart mirroring and replication Also if you have previously paused protection all jobs from the same source to the same IP address on the target will be resumed Pauses the selected jobs Data will be queued on the source while the job is paused Failover monitoring will continue while the job is paused All jobs from the same source to the same IP address on the target will be paused Stops the selected jobs The jobs remain available in the console but there will be no mirroring or replication data transmitted from the source to the target Mirroring and replication data will not be queued on the source while the job is stopped requiring a remirror when the job is restarted The type of remirror will depend on your job settings Failover monitoring will continue while the job is stopped Take Snapshot a Even if you have scheduled the snapshot process you can run it manually any time If an automatic or scheduled snapshot is currently in progress Double Take will wait until that one is finished before taking the manual snapshot Manage Snapshots Al
84. le beta users bill timesheet xls DIFFERENT ON TARGET Source Attributes Timestamp 7 2015 8 21 37 PM Size 272 Mask 0x20 Target Attributes Timestamp 7 2015 8 21 37 272 Mask 0x23 0 BYTES OUT OF SYNC File beta users vincent training doc DIFFERENT Source Attributes Timestamp 12 2015 3 28 20 i 7 Mask 0x20 Target Attributes Timestamp 20 2015 5 05 26 i 2 Mask 0x20 7 BYTES OUT OF SYNC Completion Time 1 24 2015 12 37 44 PM for connection 2 Sales data for alpha gt 206 31 65 40 1100 Elapsed Time seconds 1320 256470 Total Directories Compared 657 Total Directories Missing 0 Total Directories Remirrored 0 Total Files Compared 120978 Total Files Missing 0 Total Files Different 3 Total Files Encrypted 0 Total Files Remirrored 1 Total Bytes Skipped 0 Total Bytes Compared 18527203678 Total Bytes Missing 0 Total Bytes Different 17 Total Bytes Remirrored 17 Related links and directory attributes have been adjusted END OF VERIFICATION Timestamp The last modified date and time of the file Size The size in bytes of the file Mask The attributes associated with the file See further details below Security descriptors The NTFS file permissions of the file If the file permissions are different the message Security descriptors are different will be logged If the file permissions are the same nothing will be logged Bytes out of sync The number
85. les option prior to Double Take version 7 1 e Compare file attributes Send the entire file Double Take will compare file attributes and will mirror those files that have different attributes sending the entire file This is similar to selecting the mirror different files and the only if source is newer options prior to Double Take version 7 1 e Compare file attributes Send the attributes and bytes that differ Double Take will compare file attributes and will mirror only the attributes and bytes that are different This is equivalent to selecting the mirror different files only if source is newer and use block checksum options prior to Double Take version 7 1 Compare file attributes and data Send the attributes and bytes that differ Double Take will compare file attributes and the file data and will mirror only the attributes and bytes that are different This is equivalent to selecting the mirror different files and use block checksum options prior to Double Take version 7 1 If you are using a database application on your source select this option e Calculate size of protected data before mirroring Specify if you want Double Take to determine the mirroring percentage calculation based on the amount of data being protected If you enable this option the calculation will begin when mirroring begins For the initial mirror the percentage will display after the calculation is complete adjusting to the amount of the mirro
86. less Hyper V jobs 59 Double Take Console After you have installed the console you can launch it by selecting Double Take Double Take Console from your Programs All Programs or Apps depending on your operating system The Double Take Console is used to protect and monitor your servers and jobs Each time you open the Double Take Console you start at the Home page This page provides a high level overview of the status of your jobs The appearance of the Home page is the same for all users However other console pages may have variances in the appearance depending on the Double Take products that you have installed the Double Take license keys on your servers and the type of job you are working with F Double Take Console O9 x File Edit View Go Tools Help E NA g Get Started A Manage Servers Manage Jobs z Manage Licenses v Options VISION a D OLUTIONS Home Welcome to Double Take Console Headlines These jobs require attention EF Add servers __ Source server Target sever Activ G Create a job Import servers from a file No jobs require attention yf Choose external tools View Tools Get help Visit Vision Solutions on the web Servers Summary Total number of servers 31 FA View all servers Jobs Summary Total number of jobs 3 View iobs with errors A View jobs with warnings View all jobs A Jobs with warnings 1 Jobs with erro
87. lows you to manage your snapshots by taking and deleting snapshots for the selected job See Managing snapshots on page 103 for more information ra Failover Cutover or Recover Starts the failover process See Failing over agentless Hyper V jobs on page 57 for the process and details of failing over an agentless Hyper V job Chapter 6 Managing and controlling agentless Hyper V jobs 44 Failback Starts the failback process Failback does not apply to agentless Hyper V jobs gt gt Restore Starts the restoration process Restore does not apply to agentless Hyper V jobs Reverse Reverses protection The job will start mirroring in the reverse direction with the job name and log file names changing accordingly After the mirror is complete the job will continue running in the opposite direction See Reversing agentless Hyper V jobs on page 59 for the process and details of reversing an agentless Hyper V job Recover D Recovers the selected DR job Recovery does not apply to agentless Hyper V jobs Undo Failover or Cutover Cancels failover by undoing it This resets the servers and the job back to their original state If you had performed a live failover any changes made on the target will be lost when you undo See Failing over agentless Hyper V jobs on page 57 for the process and details of undoing a failed over agentless Hyper V job me View Job Log Opens the job log On the right click menu
88. ly close 9 Server logs for alpha E iolxi u A 2 Filter Al 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 02 PM 3 23 2012 1 33 03 PM 3 23 2012 1 33 03 PM 3 23 2012 1 33 03 PM 3 23 2012 1 33 03 PM 3 23 2012 1 33 03 PM 3 23 2012 1 33 12 PM 3 23 2012 1 33 13 PM Adding logical item SQL SQL Adding logical item Default Instance SQL Default Instance Adding logical item SQL Server Folders SQL Default Instance SQL Server Folders Adding logical item Databases SQL Default Instance Databases Adding logical item Default Database Path Data SQL Default Instance SQL Server Fold Adding logical item Default Database Path Log SQL Default Instance SQL Server Folder Adding logical item Backup Directory SQL Default Instance SQL Server Folders Backup D Adding logical item SQL Server Log Path SQL Default Instance SQL Server Folders SQL Adding logical item Full Text Catalog Path SQL Default Instance SQL Server Folders Full Adding logical ite Adding logical item User Databases SQL
89. machine at a time e Map source virtual switches to target virtual switches lIdentify how you want to handle the network mapping after failover The Source Network Adapter column lists the NICs from the source Map each one to a Target Network Adapter which is a virtual network on the target You can also choose to failover the NIC and IP addresses but leave them in a not connected state e Map source VLAN ID to target VLAN ID If your environment is a virtual local area network identify how you want to handle the VLAN IDs after failover Map each Source VLAN ID toa Target VLAN ID If you reconfigure your VLAN IDs after you have created your job you will need to edit the job to update your VLAN mappings if you want to use the new configuration You will not see this option if you are protecting more than one virtual machine at a time Chapter 3 Creating an agentless Hyper V job 20 Replica Virtual Machine Network Settings Replica Virtual Machine Network Settings Provide credentials for source virtual machine to use advanced network configuration and failover identity IV Use advanced settings for replica virtual machine network configuration Network adapters Area Connection 112 42 74 29 Source IP addresses Replica IP addresses IP Address Subnet Mask z Add 112 52 74 29 255 255 0 0 Remove Replica Default Gateways 112 52489 t Add 4 Remove Replica DNS Server addresses 112 52 48 20 t Add 4 Remove If you
90. machine will be stored D DTHV_Replicas 112 42 74 29 alpha e Select the volume and folder on the target server that will hold the replica virtual machine Select one of the volumes from the list to indicate the volume on the target where you want to store the new virtual server when it is created The target volume must have enough Free Space to store the source data If your target is a cluster you will only see the cluster aware volumes that have been added to the cluster prior to creating the job e Full path where the replica virtual machine will be stored Specify a location on the selected Volume to store the replica of the source By specifying an existing folder you can reuse an existing virtual machine on your Hyper V target created by a previous protection job This can be useful for pre staging data on a virtual machine over a LAN connection and then relocating it to a remote site after the initial mirror is complete You save time by skipping the virtual disk creation steps and performing a difference mirror instead of a full mirror In order to use a pre existing virtual disk it must be a valid virtual disk and it cannot be attached to any registered virtual machine Ina WAN environment you may want to take advantage of re using an existing virtual disk by using a process similar to the following a Create a protection job ina LAN environment letting Double Take create the virtual disk for you b Complete the mirror process
91. middle of a mirror process The data will not be ina good state until the mirror is complete Mirror Required The data on the target is not in a good state because a remirror is required This may be caused by an incomplete or stopped mirror or an operation may have been dropped on the target Snapshot Reverted The data on the source and target do not match because a snapshot has been applied on the target Restore the data from the target back to the source If you want to discard the changes on the target you can remirror to resynchronize the source and target Busy tThe source is low on memory causing a delay in getting the state of the data on the target Not Loaded Double Take target functionality is not loaded on the target server This may be caused by a license key error Unknown The console cannot determine the status The IP address on the target used for Double Take transmissions Compression Encryption Bandwidth limit On Level Data is compressed at the level specified Off Data is not compressed On Data is being encrypted before it is sent from the source to the target Off Data is not being encrypted before it is sent from the source to the target If bandwidth limiting has been set this statistic identifies the limit The keyword Unlimited means there is no bandwidth limit set for the job Connected since The date and time indicating when the current job was made This field is blank indi
92. mitted to the target it is stored in system memory You can configure how much system memory you want Double Take to use for all of its processing 2 When the allocated amount of system memory is full new changed data bypasses the full system memory and is queued directly to disk Data queued to disk is written to a transaction log Each transaction log can store 5 MB worth of data Once the log file limit has been reached a new transaction log is created The logs can be distinguished by the file name which includes the target IP address the Double Take port the connection ID and an incrementing sequence number aD o we You may notice transaction log files that are not the defined size limit This is because data l operations are not split For example if a transaction log has 10 KB left until the limit and the next operation to be applied to that file is greater than 10 KB a new transaction log file will be created to store that next operation Also if one operation is larger than the defined size limit the entire operation will be written to one transaction log 3 When system memory is full the most recent changed data is added to the disk queue as described in step 2 This means that system memory contains the oldest data Therefore when data is transmitted to the target Double Take pulls the data from system memory and sends it This ensures that the data is transmitted to the target in the same order it was changed on the s
93. more information During a mirror orphaned file processing success messages will be logged to a separate orphaned file log on the source This keeps the Double Take log from being overrun with orphaned file success processing messages Orphaned files processing statistics and any errors in orphaned file processing will still be logged to the Double Take log and during difference mirrors verifications and restorations all orphaned file processing messages are logged to the Double Take log The orphaned file log is located in the Logging folder specified for the source See Log file properties on page 96 for details on the location of that folder The orphaned log file is appended to during each orphaned file processing during a mirror and the log file will be a maximum of 50 MB Chapter 3 Creating an agentless Hyper V job 28 Network Route O Network Route Send data to the target server using this route This section is not applicable if your target is a cluster By default Double Take will select a target route for transmissions If desired specify an alternate route on the target that the data will be transmitted through This allows you to select a different route for Double Take traffic For example you can separate regular network traffic and Double Take traffic on a machine with multiple IP addresses Pi The IP address used on the source will be determined through the Windows route table Chapter 3 Creat
94. mpression l J Compression IV Enable compression 1 Minimum Medium Maximum To help reduce the amount of bandwidth needed to transmit Double Take data compression allows you to compress data prior to transmitting it across the network In a WAN environment this provides optimal use of your network resources If compression is enabled the data is compressed before itis transmitted from the source When the target receives the compressed data it decompresses it and then writes it to disk You can set the level from Minimum to Maximum to suit your needs Keep in mind that the process of compressing data impacts processor usage on the source If you notice an impact on performance while compression is enabled in your environment either adjust to a lower level of compression or leave compression disabled Use the following guidelines to determine whether you should enable compression e If data is being queued on the source at any time consider enabling compression e Ifthe server CPU utilization is averaging over 85 be cautious about enabling compression e The higher the level of compression the higher the CPU utilization will be e Do not enable compression if most of the data is inherently compressed Many image jpg gif and media wmv mp3 mpg files for example are already compressed Some images files such as bmp and tif are decompressed so enabling compression would be beneficial for those types e Compre
95. nality You can use Volume Shadow Copy for other uses outside Double Take for example Microsoft Backup uses it Keep in mind though that the driver for Volume Shadow Copy is started before the driver for Double Take Therefore if you use snapshots on your source and you revert any files on the source that are protected by your job Double Take will not be aware of the revert and the file change will not be replicated to the target The file change will be mirrored to the target during the next mirroring process e NAT Agentless Hyper V jobs do not support NAT environments e Live migration Windows 2012 live migration is supported for CSV clustered virtual machines but the shared nothing configuration is not supported If a virtual machine is migrated Double Take will automatically start a remirror e Supported configurations tThe following tables identify the supported configurations for an agentless Hyper V job onus Not You can protect virtual machines on an active host to a standby host The standby host has no active virtual machines only the replica virtual machines Replication will occur in only one direction One to one active standby You can protect virtual machines on an active host to another active host Each host has active virtual machines in addition to replica virtual machines Replication will be bi directional between the hosts One to one active active Chapter 2 Agentless Hyper V requirements
96. nect during source initialization Behavior when automatically remirroring Compare file attributes and data Send the attributes and bytes that differ Recommended for da Time allowed to complete shutdown operations seconds zj fo zi Server setup properties indicate how the server will act on startup and shutdown Log statistics automatically If enabled Double Take statistics logging will start automatically when Double Take is started Enable task command processing Task command processing is a Double Take feature that allows you to insert and run tasks at various points during the replication of data Because the tasks are user defined you can achieve a wide variety of goals with this feature For example you might insert a task to create a snapshot or run a backup on the target after a certain segment of data from the source has been applied on the target This allows you to coordinate a point in time backup with real time replication Enable this option to enable task command processing however to insert your tasks you must use the Double Take scripting language See the Scripting Guide for more information If you disable this option on a source server you can still submit tasks to be processed on a target although task command processing must be enabled on the target Advertise service with Active Directory lIf enabled the Double Take service registers with Windows Active Directory when the service is started M
97. ng on the target has been successfully written to the hard drive e Automatic action taken for scheduled and automatic snapshots Scheduled and automatic snapshots will occur normally e User interaction required for manual snapshots Manual snapshots can be taken normally Chapter 10 Managing servers 104 e Target restarted with job persistence e State Good e Description The target service was able to persist job information prior to restarting Automatic action taken for scheduled and automatic snapshots Scheduled and automatic snapshots will occur normally e User interaction required for manual snapshots Manual snapshots can be taken normally e Target restarted without job persistence e State Bad e Description The target service has been restarted and was unable to persist job information therefore operations that were in the queue have been lost e Automatic action taken for scheduled and automatic snapshots An automatic snapshot will be taken after the target restarts if the target data was in a good state prior to the target restart and the job is configured to auto remirror on auto reconnect Scheduled snapshots will be delayed until the target data is back in a good state e User interaction required for manual snapshots Start a mirror wait until it is complete and the data is in a good state and then take a manual snapshot e Restore required e State Good or bad e Description The data on th
98. o open your browser to check for console software updates You will need to use your browser if your Internet access is through a proxy server e License Inventory This section controls if the console contains a license inventory This feature may not appear in your console if your service provider has restricted access to it e Enable license inventory This option allows you to use this console to manage the Double Take licenses assigned to your organization When this option is enabled the Manage License Inventory page is also enabled e Default Installation Options All of the fields under the Default Installation Options section are used by the push installation on the Install page The values specified here will be the default options used for the push installation e Activate online after install completes Specify if you want to activate your Double Take licenses at the end of the installation The activation requires Internet access from the console machine or the machine you are installing to Activation will be attempted from the console machine first and if that fails it wil be attempted from the machine you are installing to If you choose not to have the installation activate your licenses you will have to activate them through the console license inventory or the server s properties page e Location of install folders Specify the parent directory location where the installation files are located The parent directory can b
99. omatically begin the auto disconnect process Unlimited disk queue Double Take will use an unlimited amount of disk space in the specified Queue folder for disk queuing which will allow the queue usage to automatically expand whenever the available disk space expands When the available disk space has been used Double Take will automatically begin the auto disconnect process Limit disk space for queue This option will allow you to specify a fixed amount of disk space in MB in the specified Queue folder that can be used for Double Take disk queuing When the disk space limit is reached Double Take will automatically begin the auto disconnect process e Default Linux Installation Options Alll of the fields under the Default Installation Options section are used by the push installation on the Install page The values specified here will be the default options used for the push installation Temporary folder for installation package Specify a temporary location on the server where you are installing Double Take where the installation files will be copied and run Chapter 9 Double Take Console 65 Managing servers To manage the servers in your console select Manage Servers from the toolbar The Manage Servers page allows you to view edit add remove or manage the servers in your console You can also organize the servers that are in your console into groups allowing you to filter the servers you are viewing based on your org
100. on will not function properly if the Event logs are full If an error occurs while sending an e mail a message will be generated This message will not trigger another e mail Subsequent e mail errors will not generate additional messages When an e mail is sent successfully a message will then be generated If another e mail fails one message will again be generated This is a cyclical process where one message will be generated for each group of failed e mail messages one for each group of successful e mail messages one for the next group of failed messages and so on If you start and then immediately stop the Double Take service you may not get e mail notifications for the log entries that occur during startup By default most anti virus software blocks unknown processes from sending traffic on port 25 You need to modify the blocking rule so that Double Take e mail messages are not blocked Chapter 10 Managing servers 94 Script credentials These credentials will be used when executing custom scripts for mirroring and failover A Script Credentials These credentials will be used when executing custom scripts such as during mirroring or failover User name administrator Password eesees00000 ee s Ss Domain domain com Test Specify a User name Password and Domain to use when running the scripts If you do not specify any security credentials the account running the Double Take service
101. oner which may impact system performance If you set it higher Double Take will maximize system performance by not queuing to disk as soon but the system may have to swap the memory to disk if the system memory is not available Since the source is typically running a production application it is important that the amount of memory Double Take and the other applications use does not exceed the amount of RAM in the system If the applications are configured to use more memory than there is RAM the system will begin to swap pages of memory to disk and the system performance will degrade For example by default an application may be configured to use all of the available system memory when needed and this may happen during high load operations These high load operations cause Double Take to need memory to queue the data being changed by the application In this case you would need to configure the applications so that they collectively do not exceed the amount of RAM on the server Perhaps on a server with 4 GB of RAM running the application and Double Take you might configure the application to use 1 GB and Double Take to use 1 GB leaving 2 GB for the operating system and other applications on the system Many server applications default to using all available system memory so it is important to check and configure applications appropriately particularly on high capacity servers Any changes to the memory usage will not take effect until the Do
102. or the following jobs e Full server e Full server for Linux e SQL e Exchange e Full server to ESX e Full server to ESX appliance e Full server to Hyper V e Vto ESX e V to Hyper V e Full server migration e Full server to ESX migration e Full server to Hyper V migration e Full server to Windows DR protection e Full server to Windows DR recovery e Compare file attributes Send the attributes and bytes that differ Double Take will compare file attributes and will mirror only the attributes and bytes that are different Chapter 10 Managing servers 83 This is equivalent to selecting the mirror different files only if source is newer and use block checksum options prior to Double Take version 7 1 This option is not available for the following jobs Full server Full server for Linux SQL Exchange Full server to ESX Full server to ESX appliance Full server to Hyper V V to ESX V to Hyper V Full server migration Full server to ESX migration Full server to Hyper V migration Full server to Windows DR protection Full server to Windows DR recovery e Compare file attributes and data Send the attributes and bytes that differ Double Take will compare file attributes and the file data and will mirror only the attributes and bytes that are different This is equivalent to selecting the mirror different files and use block checksum options prior to Double Take version 7 1 If you are using a database applicat
103. ort You can also select View View Console Data File to open the Double Take Console data file e Automatic Updates This section is for automatically updating your console Chapter 9 Double Take Console 63 e Automatically check for updates By default each time the console is started it will automatically check the Vision Solutions web site to see if there is updated console software available If there is updated console software available an Automatic Updates section will appear on the Home page Click Get the latest update to download and install the updated console software If you want to disable the automatic check for updates click Change automatic updates or select Options from the toolbar On the Options page deselect Automatically check for updates to disable the automatic check You can also manually check for updates by selecting Help Check for Updates e Update available lf there is an update available click Get Update The dialog box will close and your web browser will open to the Vision Solutions web site where you can download and install the update e No update available lIf you are using the most recent console software that will be indicated Click Close e No connection available If the console cannot contact the update server of if there is an error the console will report that information The console log contains a more detailed explanation of the error Click Check using Browser if you want t
104. ory Then click Add The license inventory feature cannot be enabled if your service provider has restricted access to it e Current license keys The server s current license key information is displayed To remove a key highlight it and click Remove To copy a key highlight it and click Copy Chapter 10 Managing servers 79 r If you are replacing an existing license key that has already been activated you must remove both the old license key and the old activation key Then you can add a new license key and activate it successfully If you are updating an existing license key do not remove the old license key or old activation key Add the new license key on top of the existing license key e Activation lf your license key needs to be activated you will see an additional Activation section at the bottom of the Licensing section To activate your key use one of the following procedures e Activate online lf you have Internet access you can activate your license and apply the activated license to the server in one step by selecting Activate Online i You will not be able to activate a license that has already been activated e Obtain activation key online then activate lf you have Internet access click the hyperlink in the Activation section to take you to the web so that you can submit your activation information Complete and submit the activation form and you will receive an e mail with the activation key Activate
105. ource Double Take automatically reads operations from the oldest transaction log file into Chapter 10 Managing servers 85 system memory As a transaction log is depleted it is deleted When all of the transaction log files are deleted data is again written directly to system memory step 1 4 Toensure the integrity of the data on the target the information must be applied in the same order as it was on the source If there are any delays in processing for example because of a locked file a similar queuing process occurs on the target Data that cannot immediately be applied is stored in system memory 5 When the allocated amount of system memory on the target is full new incoming data bypasses the full system memory and is queued directly to disk Data queued to disk is written toa transaction log On the target the transaction logs are identified with the source IP address the Double Take port the connection ID and an incrementing sequence number Like the source system memory on the target contains the oldest data so when data is applied to the target Double Take pulls the data from system memory Double Take automatically moves operations from the oldest transaction log file to system memory As a transaction log is depleted it is deleted When all of the transaction log files are deleted data is again written directly to system memory step 4 The following memory and queue options are available for each Double Take server
106. ppliance use the path DTAppliance installers for the Location of install folders The console will automatically use the installation files in the Linux subdirectory of this share location e Default Windows Installation Options All of the fields under the Default Installation Options section are used by the push installation on the Install page The values specified here will be the default options used for the push installation Temporary folder for installation package Specify a temporary location on the server where you are installing Double Take where the installation files will be copied and run Installation folder Specify the location where you want to install Double Take on each server This field is not used if you are upgrading an existing version of Double Take In that case the existing installation folder will be used Queue folder Specify the location where you want to store the Double Take disk queue on each server Amount of system memory to use Specify the maximum amount of memory in MB that can be used for Double Take processing Minimum free disk space This is the minimum amount of disk space in the specified Queue folder that must be available at all times This amount should be less than the amount of physical disk space minus the disk size specified for Limit disk space for queue Do not use disk queue This option will disable disk queuing When system memory has been exhausted Double Take will aut
107. r failover One to one active standby You cannot protect a single virtual machine to a One to one single active replica virtual machine The active active replica virtual machine is not active until after failover You cannot protect multiple virtual machines to a single virtual machine Each virtual machine Many to one RDIS you protect creates only one replica virtual machine You cannot protect a single virtual machine to multiple virtual machines A virtual machine can One to many only be protected once creating a single replica virtual machine You cannot protect a single virtual machine to a replica virtual machine to another replica virtual Chained machine The first replica virtual machine is not active and therefore cannot be protected until after failover oe protect a single virtual machine to yi ae Chapter 2 Agentless Hyper V requirements 12 Creating an agentless Hyper V job Use these instructions to create an agentless Hyper V job 1 2 3 Click Get Started from the toolbar Select Double Take Availability and click Next Select Protect files and folders an application or an entire Windows or Linux server and click Next Choose your source server This is the Hyper V server or cluster that is hosting the virtual machines that you want to protect If your virtual machines are on a cluster select the cluster name not the node name Choose Source Server i Choose the server w
108. r that has completed during the time it took to complete the calculation Subsequent mirrors will initially use the last calculated size and display an approximate percentage Once the calculation is complete the percentage will automatically adjust down or up to indicate the amount that has been completed Disabling calculation will result in the mirror status not showing the percentage complete or the number of bytes remaining to be mirrored The calculated amount of protected data may be slightly off if your data set contains compressed or sparse files e Verify Even if you have scheduled the verification process you can run it manually any time a mirror is not in progress e Report only Select this option if you only want to generate a verification report With this option no data that is found to be different will be mirrored to the target Choose how you want the verification to compare the files e Report and mirror files Select this option if you want to generate a verification report and mirror data that is different to the target Select the Chapter 6 Managing and controlling agentless Hyper V jobs 46 comparison method and type of mirroring you want to use See the previous mirroring methods described under Mirror Options e Set Bandwidth You can manually override bandwidth limiting settings configured for your job at any time e No bandwidth limit Double Take will transmit data using 100 bandwidth availability
109. r virtual machine is powered on and has Integration Services available this option will allow you to configure advanced settings which are used primarily for WAN support Before you can set these options you must provide credentials for the virtual machine you are protecting Click the link Provide credentials and specify the Guest Host name User name Password Domain and click OK e Use advanced settings for replica virtual machine network configuration Select this option to enable the replica virtual machine network setting configuration e Network adapters Select a network adapter from the source and specify the Replica IP addresses Replica Default Gateways and Replica DNS Server addresses to be used after failover If you add multiple gateways or DNS servers you can sort them by using the arrow up and arrow down buttons Repeat this step for each network adapter on the source i Updates made during failover will be based on the network adapter name when protection is established If you change that name you will need to delete the job and re create it so the new name will be used during failover If you update one of the advanced settings IP address gateway or DNS server then you must update all of them Otherwise the remaining items will be left blank If you do not specify any of the advanced settings the replica virtual machine will be assigned the same network configuration as the source By default the source IP addre
110. r virtual machine to respond plus the interval time between these two checks times the number of consecutive failures that can be allowed That would be ICMP host response time virtual machine response time interval failure number If the ICMP check fails the virtual machine check is skipped and the ICMP check will reoccur after the interval time e ICMP disabled lIf ICMP is disabled on your host when the job is created your failure time is calculated by the length of time it takes your virtual machine to respond plus the interval time between each response times the number of consecutive Chapter 3 Creating an agentless Hyper V job 22 failures that can be allowed That would be virtual machine response time interval failure number Keep in mind that timeouts from a failed check are included in the response times so your failure time will not be precise e Wait for user to initiate failover If you are monitoring for failover when a failure occurs you can have Double Take automatically initiate the failover process or wait for you to initiate it When this option is enabled and a failure occurs the job will wait in Failover Condition Met for you to manually initiate the failover process When this option is disabled failover will occur immediately when a failure occurs Chapter 3 Creating an agentless Hyper V job 23 Failover Identity l Failover Identity c Apply source nety K nt Retain target network
111. rease the chance of a lockout e Retry on this interval lf you have enabled the automatic retry specify the length of time in minutes to retry the login Chapter 10 Managing servers 78 Server licensing I The fields and buttons in the Licensing section will vary depending on your Double Take Console configuration and the type of license keys you are using a Licensing Add license keys and activation keys Choose Add Current license keys Product Serial Number A Double Take Availability for Windows 7323 10 12 2014 Remove Copy W Changes to licensing are applied immediately Activation A This server has one or more licenses that require activation To fully activate your software you can use the activate online feature to complete the activation process using your internet connection Alternatively using the link below you may obtain activation keys from our activation website and add them above to activate your software Server information tmax74pava8f5epfn7jukikc6ebz761f7vb mwpq Copy Get an activation key from our website pre online Add license keys and activation keys Y our license key or activation key is a 24 character alpha numeric key You can change your license key without reinstalling if your license changes To add a license key or activation key type in the key or click Choose from inventory and select a key from your console s license invent
112. rrent Servers This list contains the servers currently available in your console session Servers that are not licensed for the workflow you have selected and those not applicable to the workload type you have selected will be filtered out of the list Select your target server from the list Find a New Server If the server you need is not in the Current Servers list click the Find a New Server heading From here you can specify a server along with credentials for logging in to the server If necessary you can click Browse to select a server from a network drill down list If you enter the target server s fully qualified domain name the Double Take Console will resolve the entry to the server short name If that short name resides in two different domains this could result in name resolution issues In this case enter the IP address of the server When specifying credentials for a new server specify a user that is a member of the local Double Take Admin and local administrator security groups The user must also have administrative rights for Microsoft Hyper V 9 Click Next to continue Chapter 3 Creating an agentless Hyper V job 15 10 You have many options available for your agentless Hyper V job Configure those options that are applicable to your environment Allagentless Hyper V jobs will have the following sections available on the Set Options page e Replica Virtual Machine Configuration Mirror Verify amp
113. rs 0 e Headlines The top section gives a quick overview of any jobs that require attention as well as providing quick access buttons e These jobs require attention Any jobs that require attention those in an error state are listed You will see the source and target server names listed as well as a short description of the issue that requires your attention If the list is blank there are no jobs that require immediate attention Chapter 9 Double Take Console 60 e View lf you highlight a job in the list and click View you will go to the View Job Details page where you can see more detailed information about the job e Tools Select this drop down list to launch other Vision Solutions consoles e Servers Summary The middle section summarizes the servers in your console e Total number of servers This field displays the number of servers that you have been added to the console e View all servers Select this link to go to the Manage Servers page where you can view edit add remove or manage the servers in your console See Managing servers on page 66 e Jobs Summary The bottom section summarizes the jobs in your console e Total number of jobs This field displays the number of jobs running on the servers in your console e View jobs with errors Select this link to go to the Manage Jobs page where the Filter Jobs with errors will automatically be applied e View jobs with warnings Select this link to go to the Mana
114. rver a cluster or a node Cluster jobs will be associated with the cluster name and standalone Chapter 6 Managing and controlling agentless Hyper V jobs 38 jobs will be associated with a standalone server or a cluster node Job Type Each job type has a unique job type name This job is an Agentless Hyper V job Fora complete list of all job type names press F 1 to view the Double Take Console online help Activity There are many different Activity messages that keep you informed of the job activity Most of the activity messages are informational and do not require any administrator interaction If you see error messages check the job details Keep in mind that Idle indicates console to server activity is idle not that your servers are idle If your source is a cluster and the Double Take service on the source is stopped and restarted but failover is not initiated you will need to manually bring the supporting cluster resource back online through the cluster manager in order for your agentless Hyper V job to reconnect and transition to a good state The resource is located on the source cluster and is called DTTargetRes_VM_GUID where VM is the name of your virtual machine and GUID is a global unique ID assigned to the job The resource will be located in the Other Resources group If your source is a cluster and your cluster resource moves to a node that Double Take considers a bad node for example the Double Take service is not r
115. rvers 106
116. s been reached the oldest file will be overwritten e Verification The verification log is created during the verification process and details which files were verified as well as the files that are synchronized See Verification log on page 98 e File name This field contains the base log file name for the verification process The job type and a unique identifier will be prefixed to the base log file name For example since the default is DT Verify log the verification log for a files and folders job will be Files and Folders_123456abcdef DTVerify log e Maximum size Specify the maximum size in bytes of the verification log file The default is 1048576 bytes 1 MB e Append Enable the Append check box if you want to append each verification process to the same log file If this check box is disabled each verification process that is logged will overwrite the previous log file By default this option is enabled e Language Select the language for your verification log file Chapter 10 Managing servers 96 e Statistics tThe statistics log maintains connection statistics such as mirror bytes in queue or replication bytes sent This file is a binary file that is read by the DTStat utility See the Reference Guide for details on DTStat e File name This is the name of the statistics log file The default file name is statistic sts e Maximum size Specify the maximum size in bytes of the statistics log file The defa
117. s option if you want to start the verification schedule at the specified date and time e Report only Select this option if you only want to generate a verification report With this option no data that is found to be different will be mirrored to the target Choose how you want the verification to compare the files e Report and mirror files Select this option if you want to generate a verification report and mirror data that is different to the target Select the comparison method and type of mirroring you want to use See the previous mirroring methods described under Mirror Options e General Options Choose your general mirroring options e Calculate size of protected data upon connection Specify if you want Double Take to determine the mirroring percentage calculation based on the amount of data being protected If you enable this option the calculation will begin when mirroring begins For the initial mirror the percentage will display after the calculation is complete adjusting to the amount of the mirror that has completed during the time it took to complete the calculation Subsequent mirrors will initially use the last calculated size and display an approximate percentage Once the calculation is complete the percentage will automatically adjust down or up to indicate the amount that has been completed Disabling calculation will result in the mirror status not showing the percentage complete or the number of bytes remaining
118. s the messages selected in the Job logs window to the Windows clipboard Clear lt 4 This button clears the Job logs window The messages are not cleared from the respective files on the server If you want to view all of the messages again close and reopen the Job logs window Time This column in the table indicates the date and time when the message was logged Description This column in the table displays the actual message that was logged Chapter 6 Managing and controlling agentless Hyper V jobs 56 Failing over agentless Hyper V jobs When a failover condition has been met failover will be triggered automatically if you disabled the wait for user option during your failover configuration If the wait for user before failover option is enabled you will be notified in the console when a failover condition has been met At that time you will need to trigger it manually from the console when you are ready 1 On the Manage Jobs page highlight the job that you want to failover and click Failover Cutover or Recover in the toolbar 2 Select the type of failover to perform e Failover to live data Select this option to initiate a full live failover using the current data on the target This option will shutdown the source machine if it is online stop the protection job and start the replica virtual machine on the target with full network connectivity Perform test failover Select this option to perform a test failover
119. scheduled and automatic snapshots Scheduled and automatic snapshots will occur normally e User interaction required for manual snapshots Manual snapshots can be taken normally e Write operation retried e State Good e Description An operation cannot be written to the hard drive on the target For example the file could be in use by another application on the target e Automatic action taken for scheduled and automatic snapshots Scheduled and automatic snapshots will occur normally although the operation that is being retried will not be included in the snapshot e User interaction required for manual snapshots Manual snapshots can be taken normally although the operation that is being retried will not be included in the snapshot e Write operation dropped e State Bad e Description An operation could not be written to the hard drive on the target even after multiple retries For example the file could be in use by another application on the target e Automatic action taken for scheduled and automatic snapshots An automatic snapshot will be taken just prior to the operation being dropped Scheduled snapshots will be delayed until the target data is back in a good state e User interaction required for manual snapshots Start a mirror wait until it is complete and the data is in a good state and then take a manual snapshot e Write operation succeeded e State Good e Description An operation that was retryi
120. se 4 5 GB so that 500 MB remains free e Alert at this queue usage This is the percentage of the disk queue that must be in use to trigger an alert message By default the alert will be generated when the queue reaches 50 Chapter 10 Managing servers 88 Source server properties These properties are specific to the source server role Source Number of replication packets per one mirror packet Ej 5 zi Changing this ratio does not affect current connections I Replicate NTFS security attributes by name Maximum pending mirror operations 1000 Size of mirror packets bytes 3 Zj 65536 Ej Calculate size of protected data upon connection e Number of replication packets per one mirror packet You can specify the ratio of replication packets to mirror packets that are placed in the source queue The default value 5 allows Double Take to dynamically change the ratio as needed based on the amount of replication data in queue If you set a specific value other than the default other than 5 the specified value will be used Changes to this setting will take effect for future jobs Existing jobs will have to be stopped and restarted to pick up the new ratio e Replicate NTFS security attributes by name If you are protecting or migrating data Double Take allows you to replicate Windows permission attributes by local name as well as security ID SID By replicating Windows security by name you can transmit t
121. se the chance of a lockout e Restarting the Double Take Console will automatically initiate an immediate login e Entering new credentials will initiate an immediate login using the new credentials e Retry on this interval lf you have enabled the automatic retry specify the length of time in minutes to retry the login e Server Communication This section is used to determine how the console communicates with your Double Take servers e Default port for XML web services protocol Specifies the port that the console will use when sending and receiving data to Double Take servers By default the port is 6325 Changes to the console port will not take effect until the console is restarted e Default port for legacy protocol lIf you are using an older Double Take version you will need to use the legacy protocol port This applies to Double Take versions 5 1 or earlier e Diagnostics This section assists with console troubleshooting e Export Diagnostic Data This button creates a raw data file that can be used for debugging errors in the Double Take Console Use this button as directed by technical support e View Log File This button opens the Double Take Console log file Use this button as directed by technical support You can also select View View Console Log File to open the Double Take Console log file e View Data File This button opens the Double Take Console data file Use this button as directed by technical supp
122. source is located on the source cluster and is called DTTargetRes_VM_GUID where VM is the name of your virtual machine and GUID is a global unique ID assigned to the job The resource will be located in the Other Resources group Chapter 3 Creating an agentless Hyper V job 34 Simulating protection Double Take offers a simple way for you to simulate protection in order to generate statistics that can be used to approximate the time and amount of bandwidth that a particular source and job type will use when actively established This simulation uses the TDU Throughput Diagnostics Utility which is a built in null non existent target that simulates a real job No data is actually transmitted across the network Since there is no true job this diagnostics utility helps you plan your implementation strategy Before and after simulating a job you should gather network and system information specific to Double Take operations Use the Double Take Console to automatically collect this data It gathers Double Take log files Double Take and system settings network configuration information such as IP WINS and DNS addresses and other data which may be necessary in evaluating Double Take performance 1 From the Double Take Console on the Manage Servers page right click the source where you will be running the TDU select Gather Support Diagnostics and specify a location to store the zipped diagnostics information It may take several minut
123. ss will be included in the target IP address list as the default address If you do not want the source IP address to be the default address on the target after failover remove that address from the Replica IP addresses list Chapter 3 Creating an agentless Hyper V job 21 Failover Monitor Failover Monitor I Monitor for failover Total time to failure 99 05 00 Consecutive failures Fp 5 0 v 0 i Monitor on this interval 00 00 10 7 Wait for user to initiate failover e Monitor for failover Select this option if you want the target to actively monitor the source for a failure If you disable this option and do not monitor for failover the target will not actively monitor the source for a failure In this case you will have to monitor the source manually on your own and initiate failover manually if there is a source failure e Total time to failure Specify in hours minutes seconds how long the target will keep trying to contact the source before the source is considered failed This time is precise If the total time has expired without a successful response from the source this will be considered a failure Consider a shorter amount of time for servers such as a web server or order processing database which must remain available and responsive at all times Shorter times should be used where redundant interfaces and high speed reliable network links are available to prevent the false detection of failure I
124. ssion may improve performance even in high bandwidth environments e Do not enable compression in conjunction with a WAN Accelerator Use one or the other to compress Double Take data All jobs from a single source connected to the same IP address on a target will share the same compression configuration Chapter 3 Creating an agentless Hyper V job 31 Bandwidth Bandwidth Do not limit bandwidth Use a fixed limit bytes per second Use scheduled limits Every day 6 00 AM 6 00 PM 1250000 Every day 6 00 PM 6 00 AM 5625000 New Edit Delete i Bandwidth is not limited during unscheduled times Bandwidth limitations are available to restrict the amount of network bandwidth used for Double Take data transmissions When a bandwidth limit is specified Double Take never exceeds that allotted amount The bandwidth not in use by Double Take is available for all other network traffic All jobs from a single source connected to the same IP address on a target will share the same bandwidth configuration The scheduled option is not available in clustered environments e Do not limit bandwidth Double Take will transmit data using 100 bandwidth availability e Use a fixed limit Double Take will transmit data using a limited fixed bandwidth Select a Preset bandwidth limit rate from the common bandwidth limit values The Bandwidth field will automatically update to the bytes per second value for your sele
125. ssistance and support for advanced configurations may be referred to a Pre Sales Systems Engineer or to Professional Services For more information see the Windows and Linux tab on the Vision Solutions Consulting Services web page at http www visionsolutions com services support services overview e Training Classroom and computer based training are available For more information see the Double Take Product Training web page at http www VisionSolutions com Services DT Education aspx This documentation is subject to the following 1 Change without notice 2 Furnished pursuant to a license agreement 3 Proprietary to the respective owner 4 Not to be copied or reproduced unless authorized pursuant to the license agreement 5 Provided without any expressed or implied warranties 6 Does not entitle Licensee End User or any other party to the source code or source code documentation of anything within the documentation or otherwise provided that is proprietary to Vision Solutions Inc and 7 All Open Source and Third Party Components OSTPC are provided AS IS pursuant to that OSTPC s license agreement and disclaimers of warranties and liability Vision Solutions Inc and or its affiliates and subsidiaries in the United States and or other countries own hold rights to certain trademarks registered trademarks and logos Hyper V and Windows are registered trademarks of Microsoft Corporation in the United States
126. t on the source and target Replication status Replicating Data is being replicated to the target Ready There is no data to replicate Pending Replication is pending Stopped Replication has been stopped Out of Memory Replication memory has been exhausted Failed The Double Take service is not receiving replication operations from the Double Take driver Check the Event Viewer for driver related issues Unknown The console cannot determine the status Replication queue The total number of replication bytes in the source queue Disk queue The amount of disk space being used to queue data on the source Bytes sent The total number of mirror and replication bytes that have been transmitted to the target Chapter 6 Managing and controlling agentless Hyper V jobs 51 Bytes sent compressed The total number of compressed mirror and replication bytes that have been transmitted to the target If compression is disabled this statistic will be the same as Bytes sent Chapter 6 Managing and controlling agentless Hyper V jobs 52 Validating an agentless Hyper V job Over time you may want to confirm that any changes in your network or environment have not impacted your Double Take job Use these instructions to validate an existing job 1 2 3 From the Manage Jobs page highlight the job and click View Job Details in the toolbar In the Tasks area on the right on the View Job Details page click Valida
127. te Successfully created connection 98S5ae0ce bbba 47a2 84ec Sfa79da80174 connecting Files Waiting for source endpoint of to be established 00 10 00 Established source endpoint of 112 42 74 29 6320 for engine connection with replication s Changing to ProtectingState from StartingState in response to StartSucceededEvent consu Exited StartingState Entered ProtectingState Event log entry written 6004 Changing to MirroringState from ProtectingState in response to MirroringEvent consumed b Entered MirroringState Changing to SynchronizedState from MirroringState in response to MirrorCompletedEvent c Exited MirroringState Entered SynchronizedState Event log entry written 6008 Changing to MirroringState from SynchronizedState in response to MirroringEvent consume Exited SynchronizedState Entered MirroringState Changing to SynchronizedState from MirroringState in response to MirroridleEvent consum Exited MirroringState Entered SynchronizedState X The following table identifies the controls and the table columns in the Job logs window Start gt Pause ii This button starts the addition and scrolling of new messages in the window This button pauses the addition and scrolling of new messages in the window This is only for the Job logs window The messages are still logged to their respective files on the server Chapter 6 Managing and controlling agentless Hyper V jobs 55 Copy This button copie
128. te job properties Double Take validates that your source and target are compatible The Summary page displays your options and validation items Errors are designated by a white X inside a red circle Warnings are designated by a black exclamation point inside a yellow triangle A successful validation is designated by a white checkmark inside a green circle You can sort the list by the icon to see errors warnings or successful validations together Click on any of the validation items to see details You must correct any errors before you can continue Depending on the error you may be able to click Fix or Fix All and let Double Take correct the problem for you For those errors that Double Take cannot correct automatically you will need to modify the source or target to correct the error or you can select a different target You must revalidate the selected servers by clicking Recheck until the validation check passes without errors Validation checks for an existing job are logged to the job log on the target server 4 Once your servers have passed validation click Close Chapter 6 Managing and controlling agentless Hyper V jobs 53 Editing an agentless Hyper V job Use these instructions to edit an agentless Hyper V job 1 2 From the Manage Jobs page highlight the job and click View Job Details in the toolbar In the Tasks area on the right on the View Job Details page click Edit job properties You will not be
129. tely Alll of the data in the target queue will be discarded and failover will begin immediately The advantage to this option is that failover will occur immediately The disadvantage is that any data in the target queue will be lost e Revert to last good snapshot if target data state is bad If the target data is in a bad state Double Take will automatically revert to the last good Double Take snapshot before failover begins If the target data is in a good state Double Take will not revert the target data Instead Double Take will apply the data in the target queue and then failover The advantage to this option is that good data on the target is guaranteed to be used The disadvantage is that if the target data state is bad you will lose any data between the last good snapshot and the failure 4 When you are ready to begin failover click Failover Cutover or Recover Chapter 7 Failing over agentless Hyper V jobs 57 PA Depending on your replica configuration you may have to reboot your replica after failover You will be prompted to reboot if it is necessary In a cluster configuration if you move the shared storage ownership on the original source cluster or change the drive letter after failover you will be unable to reverse your protection Keep the source cluster configuration the same in order to allow proper reversing of protection 5 If desired you can undo your live or test failover by selecting Undo Failover or Cuto
130. the source will be flushed then Double Take will auto reconnect If configured Double Take will auto remirror The remirror re establishes the target baseline to ensure data integrity so disabling auto remirror is not advised e Queuing errors If there are errors during disk queuing on either the source or target for example Double Take cannot read from or write to the transaction log file the data integrity cannot be guaranteed To prevent any loss of data the source will auto disconnect and auto reconnect If configured Double Take will auto remirror The remirror re establishes the target baseline to ensure data integrity so disabling auto remirror is not advised e Target server interruption lf a target machine experiences an interruption such as a cable or NIC failure the source target network connection is physically broken but both the source and target maintain the connection information The Double Take source not being able to communicate with the Double Take target stops transmitting data to the target and queues the data changes similar to the exhausted target queues described above When the interruption is resolved and the physical source target connection is reestablished the source begins sending the queued data to the target If the source target connection is not reestablished by the time the source queues are exhausted the source will auto disconnect as described above e Target service shutdown If the target s
131. tion gathering and sending the resulting file to the console machine View Replication Service Details c Views the replication service details for a server This button opens the Replication service view window This separate window allows you to continue working in the Double Take Console while monitoring the replication service details You can open multiple Replication service view windows for multiple servers When the Double Take Console is closed all Replication service view windows will automatically close If you do not want to open separate windows you can switch between servers that are in your Double Take Console from within the Replication service view window See the Reference Guide for a complete list of replication details gt Refresh Refreshes the status of the selected servers Overflow Chevron Displays any toolbar buttons that are hidden from view when the window size is reduced Chapter 10 Managing servers 70 Left pane toolbar Between the main toolbar and the left pane is a smaller toolbar These toolbar options control the server groups in the left pane Create New Server Group a Creates a new server group below the selected group Rename Server Group m Allows you to rename the selected server group Delete Server Group x Deletes the selected server group This will not delete the servers in the group only the group itself Overflow Chevron Displays any toolbar buttons that are h
132. to be mirrored ri The calculated amount of protected data may be slightly off if your data set contains compressed or sparse files e Delete orphaned files An orphaned file is a file that exists in the replica data on the target but does not exist in the protected data on the source This option specifies if orphaned files should be deleted on the target Orphaned file configuration is a per target configuration All jobs to the same target will have the same orphaned file configuration Chapter 3 Creating an agentless Hyper V job 27 The orphaned file feature does not delete alternate data streams To do this use a full mirror which will delete the additional streams when the file is re created If delete orphaned files is enabled carefully review any replication rules that use wildcard definitions If you have specified wildcards to be excluded from protection files matching those wildcards will also be excluded from orphaned file processing and will not be deleted from the target However if you have specified wildcards to be included in your protection those files that fall outside the wildcard inclusion rule will be considered orphaned files and will be deleted from the target If you want to move orphaned files rather than delete them you can configure this option along with the move deleted files feature to move your orphaned files to the specified deleted files directory See Target server properties on page 91 for
133. to take to return a host virtual machine or any other component of a virtual environment to a healthy state Double Take extends the PRO capabilities by providing specific PRO tips for agentless Hyper V jobs In order to receive PRO tips for agentless Hyper V jobs your SCVMM machine must be a member of the domain where your Hyper V host is located and you must have a machine same or different than your SCVMM machine running Microsoft System Center Operations Manager SCOM 2007 R2 or 2012 1 Determine the Double Take Hyper V Management Pack for System Center Operations Manager file that you need for your version of SCOM e SCOM 2007 R2 Use the file DTHV FailoverPendingNotification MP xml e SCOM 2012 Use the file DTHV FailoverPendingNotification2012 MP xml 2 Locate the management pack you need using one of the following methods e Start the Double Take installation and when the Autorun appears select the Get the SCVMM Management Pack link Copy the appropriate xml file to your SCOM machine e Onthe Double Take installation DVD browse to the SCMgmt SCVMM directory and copy the appropriate xml file to your SCOM machine e Download the appropriate Hyper V Management Pack from the Vision Solutions support web site to your SCOM machine 3 From the SCOM console click Administration or select Go Administration 4 Right click on the Management Packs line item in the left pane and select Import Management Pack 5 Click Add and s
134. uble Take service has been restarted on the server Do not use disk queue This option will disable disk queuing When system memory has been exhausted Double Take will automatically begin the auto disconnect process e Unlimited disk queue Double Take will use an unlimited amount of disk space in the specified Queue folder for disk queuing which will allow the queue usage to automatically expand whenever the available disk space expands When the available disk space has been used Double Take will automatically begin the auto disconnect process e Limit disk space for queue This option will allow you to specify a fixed amount of disk space in MB in the specified Queue folder that can be used for Double Take disk queuing When the disk space limit is reached Double Take will automatically begin the auto disconnect process e Minimum free disk space This is the minimum amount of disk space in the specified Queue folder that must be available at all times This amount should be less than the amount of physical Chapter 10 Managing servers 87 disk space minus the disk size specified for Limit disk space for queue The Limit disk space for queue and Minimum free disk space settings work in conjunction with each other For example assume your queue is stored on a 10 GB disk with the Limit disk space for queue setto 10 GB and the Minimum free disk space set to 500 MB If another program uses 5 GB Double Take will only be able to u
135. ult is 10485760 bytes 10 MB Once this maximum has been reached the oldest data will be overwritten e Write interval Specify how often in minutes Double Take writes to the statistics log file The default is every 5 minutes Chapter 10 Managing servers 97 Verification log In the log file each verification process is delineated by beginning and end markers A list of files that are different on the source and target is provided as well cumulative totals for the verification process The information provided for each file is the state of its synchronization between the source and the target at the time the file is verified If the remirror option is selected so that files that are different are remirrored the data in the verify log reflects the state of the file before it is remirrored and does not report the state of the file after it is remirrored If a file is reported as different review the output for the file to determine what is different Sample verification log VERIFICATION OF CONNECTION 2 CHECKSUM ENABLED Sales data for alpha gt 206 31 65 40 1100 Start Time 1 24 2015 12 15 20 PM for connection 2 Sales data for alpha gt 206 31 65 40 1100 File beta users bob budget xls DIFFERENT ON TARGET Source Attributes Timestamp 1 17 2015 8 21 36 PM Size 272 Mask 0x20 Target Attributes Timestamp 1 17 2015 8 21 36 PM Size 272 Mask 0x20 Security descriptors are different 0 BYTES OUT OF SYNC Fi
136. unning or the node has an invalid license key your job will enter an error state You must fix the issue on the cluster node and then you can restart the job However if this situation occurs on a target cluster the job will no longer appear in the console In this case you will need to fix the issue on the cluster node and then bring the supporting cluster resource back online through the cluster manager The resource is located on the source cluster and is called DTTargetRes_VM_GUID where VM is the name of your virtual machine and GUID is a global unique ID assigned to the job The resource will be located in the Other Resources group Mirror Status e Calculating The amount of data to be mirrored is being calculated e In Progress Data is currently being mirrored e Waiting Mirroring is complete but data is still being written to the target e Idle Data is not being mirrored e Paused Mirroring has been paused e Stopped Mirroring has been stopped e Removing Orphans Orphan files on the target are being removed or deleted depending on the configuration e Verifying Data is being verified between the source and target e Unknown The console cannot determine the status Replication Status e Replicating Data is being replicated to the target e Ready There is no data to replicate e Pending Replication is pending Chapter 6 Managing and controlling agentless Hyper V jobs 39 Transmit Mode Stopped
137. ust manually remirror your data from the source to the target overwriting the target data changes that you caused to ensure data integrity between your source and target e Behavior when automatically remirroring Specify how Double Take will perform the mirror when it is automatically remirroring Ifyou are using files and folders full server to ESX appliance data migration DR data protection or DR data recovery job and are using a database application or are protecting a domain controller do not use the compare file attributes only options unless you know for certain that you need it With database applications and because domain controllers store their data in a database it is critical that all files not just some of the files are mirrored In this case you should compare both the attributes and the data Do not compare files Send the entire file Double Take will not perform any comparisons between the files on the source and target All files will be mirrored to the target sending the entire file This is equivalent to selecting the mirror all files option prior to Double Take version 7 1 e Compare file attributes Send the entire file Double Take will compare file attributes and will mirror those files that have different attributes sending the entire file This is equivalent to selecting the mirror different files and the only if source is newer options prior to Double Take version 7 1 This option is not available f
138. ver Core servers e Virtual machine configurations The following limitations apply to the virtual machines on the source and target Hyper V servers e The virtual machines must be in their own home folder that is not shared by any other virtual machines e The virtual machines cannot be located in the root ofa CSV e The virtual machines cannot be created in or replicated to the Hyper V system default folder e The virtual machines snapshot folder must be unique to each virtual machine they cannot be in the Hyper V system default folder and they cannot be changed once protection has been established e The virtual machines cannot use raw pass through or differencing disks e The virtual machines disks cannot reside on storage accessed by a UNC path e Ifa source virtual machine is configured for dynamic memory the replica virtual machine will automatically be configured for dynamic memory You cannot configure the replica differently e System memory The minimum system memory on each server should be 1 GB The recommended amount for each server is 2 GB e Disk space for program files This is the amount of disk space needed for the Double Take program files The amount depends on your operating system version and your architecture 32 bit or 64 bit and ranges from 350 500 MB Chapter 2 Agentless Hyper V requirements 5 Pi The program files can be installed to any volume while the Microsoft Windows Installer files are
139. ver in the toolbar In either case the replica virtual machine on the target will be shut down and the protection job will be restarted performing a file differences mirror The one difference when undoing a live failover is the virtual machine on the source will be started This step is not needed when undoing a test failover because the virtual machine on the source is not shut down during a test failover In both cases all changes made on the replica virtual machine on the target will be lost If you do not want to lose data changes made on the replica virtual machine on the target see Reversing agentless Hyper V jobs on page 59 Chapter 7 Failing over agentless Hyper V jobs 58 Reversing agentless Hyper V jobs Reversing protection allows you to protect your source replica virtual server running on the target back to the original source host 1 Make sure you original source virtual machine is not running 2 Onthe Manage Jobs page highlight the job that you want to reverse and click Reverse in the toolbar The flow of mirroring and replication data will change Data will be transmitted from the replica virtual machine on the target back to the original source host After the reverse is complete your source replica virtual machine on the target is being protected to your original source host In the event you want to go back to your original server roles and hardware configuration you can failover again Chapter 8 Reversing agent
140. will automatically be updated to include the new virtual hard disk and a file difference mirror will automatically start However if a virtual hard disk is removed from the protected virtual machine the virtual hard disk will not be removed from the projection job until it is deleted from the source or the protection job is deleted and re created If your source is a cluster and the Double Take service on the source is stopped and restarted but failover is not initiated you will need to manually bring the supporting cluster resource back online through the cluster manager in order for your agentless Hyper V job to reconnect and transition to a good state The resource is located on the source cluster and is called DTTargetRes_VM_GUID where VM is the name of your virtual machine and GUID is a global unique ID assigned to the job The resource will be located in the Other Resources group If your source is a cluster and your cluster resource moves to a node that Double Take considers a bad node for example the Double Take service is not running or the node has an invalid license key your job will enter an error state You must fix the issue on the cluster node and then you can restart the job However if this situation occurs on a target cluster the job will no longer appear in the console In this case you will need to fix the issue on the cluster node and then bring the supporting cluster resource back online through the cluster manager The re
141. will be used After you have specified credentials you can click Test to confirm the credentials can be used for a successful login It the credentials cannot be authenticated you will receive an error You will need to manually test that credentials you supply have appropriate rights to execute any scripts you may be running Chapter 10 Managing servers 95 Log file properties These settings allow you to specify your log file configuration a Logging Logging folder C Program Files Vision Solutions Double Take Hl Messages amp Alerts Maximum size bytes Maximum number of files 5242880 jo Jg Verification File name DTVerify log Maximum size bytes 1048576 IV Append Language English United States Statistics File name Maximum size bytes Write interval minutes 10485760 ES e Logging folder Specify the directory where each of the log files in this section are stored The default location is the directory where the Double Take program files are installed e Messages amp Alerts These settings apply to the service log file e Maximum size Specify the maximum size in bytes of the log file The default size is 5242880 bytes 5 MB Once the maximum has been reached a new log file will be created e Maximum number of files Specify the maximum number of log files that are maintained The default is 20 and the maximum is 999 Once the maximum ha
142. y clicking Recheck until the validation check passes without errors Before a job is created the results of the validation checks are logged to the Double Take Management Service log on the target After a job is created the results of the validation checks are logged to the job log See the Double Take Reference Guide for details on the various Double Take log files Once your servers have passed validation and you are ready to update your job click Finish Chapter 6 Managing and controlling agentless Hyper V jobs 54 Viewing an agentless Hyper V job log You can view a job log file through the Double Take Console by selecting View Job Log from the toolbar on the Manage Jobs page Separate logging windows allow you to continue working in the Double Take Console while monitoring log messages You can open multiple logging windows for multiple jobs When the Double Take Console is closed all logging windows will automatically close ri Because the job log window communicates with the target server if the console loses communication with the target server after the job log window has already been opened the job log window will display an error This includes a target cluster node roll that causes the job log to be hosted by a new cluster node FJ Job logs for alpha to beta a 7 ua 2 2 14 2012 6 48 46 AM 2 14 2012 6 48 47 AM 2 14 2012 6 48 47 AM 2 14 2012 6 48 47 AM 2 14 2012 6 48 47 AM 2 14 2012 6 48 47 AM 2 2 14 2012 6
143. you change this setting you must restart the Double Take service for this change to take effect e Port The server uses this port to send and receive commands and operations between Double Take servers e Encrypt network data Use this option to encrypt your data before it is sent from the source to the target Both the source and target must be encryption capable version 7 0 1 or later however this option only needs to be enabled on the source or target in order to encrypt data Keep in mind that all jobs from a source with this option enabled or to a target with this option enabled will have the same encryption setting Changing this option will cause jobs to auto reconnect and possibly remirror e Automatic retry This option will have the target server automatically retry server login credentials for a job after the specified retry interval if the server login credentials are not accepted Keep in mind the following caveats when using this option e Because server logins for a job are controlled by the target this setting is only applicable to target servers e This is only for server credentials not job credentials e Verify your environment s security policy when using this option Check your policies for failed login lock outs and resets For example if your policy is to reset the failed login attempt count after 30 minutes set this auto retry option to the same or a slightly larger value as the 30 minute security policy to dec
144. your job Chapter 3 Creating an agentless Hyper V job 17 Replica Virtual Machines C Replica Virtual Machines Map source virtual machines to target volumes VM Display Name a Target Volume Target Path re alpha D DTHV_Replicas 112 42 74 29 alpha D beta D z DTHV_Replicas 112 42 74 29 beta Show additional target volumes information e Target Volume For each virtual machine you are protecting specify the volume where you want to store the replica virtual machine on the target e Target Path For each virtual machine you are protecting specify a path on the selected Target Volume where you want to store the replica virtual machine on the target e Show additional target volumes information Click this link to see storage information for the volumes on your target This will help you select the appropriate volumes for your replica virtual machines O If your target is a cluster you will only see the clustered volumes that have been added to the cluster prior to creating the job If the target is a cluster node you will only see non clustered volumes Chapter 3 Creating an agentless Hyper V job 18 Replica Virtual Machine Location Replica Virtual Machine Location Select the volume and folder on the target server that will hold the replica virtual machine _ voume Total size Free Space ome PY w C 19 43 GB 2 8 GB w E 213 29 GB 176 53 GB Full path where the replica virtual

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