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SnapSAN AutoTier User Guide

1. Moved Material Logical Disk Disk Array Subsystem D8 10 1 PoolNo 0000h LD No 0531h Pool Busy 5 gt 5 Work Disk for Optimization Pool Name Pool RAID PD Type Pool0025 0 1 SAS wk OMLIME 050e Ready 0025h ONLINE 051 Scheduled SPAR 00h 0025 0512 WN k ONLINE 0512 Moving VSPAR 00h 10 Poolo 5 SAS P 0514h CX wk_ONLINE_0514 Ready VSPAR 00h 0025h Pool0025 232 5 545 Figure 3 7 Example of Display of Detailed Information of Work Disk for Optimization Table 3 6 Display Items for Work Disk for Optimization Display Item Description Disk Array Subsystem in Moved Displays the disk array name for the logical disk to be moved selected in the Material Logical Disk Detailed Display Area RANK Pool No in Moved Material Displays the RANK pool number for the logical disk to be moved selected in Logical Disk the Detailed Display Area LD No in Moved Material Logical Displays the logical disk number for the logical disk to be moved selected in Disk the Detailed Display Area RANK Pool Busy in Moved Displays the estimated Busy Ratio of the RANKs pools after the logical disk Material Logical Disk to be moved selected in the Detailed Display Area have been moved Number Displays icons and logical disk number of Work Disks for Optimization Type Displays the volume type of each work disk for optimization LD Name Displays nicknames of Work Disks f
2. 3 2 Operation on Screen Execute the planned replacement practically 4 1 Logical Disk Movement Command Appendix A Command of Performance Optimization Function Verifying logical disk performance after replacement Performance Monitoring User s Manual Verify that the bottleneck is resolved as expected by using the Performance Analysis User s Manual performance monitoring function and the performance analysis function as a result of replacement Chapter 1 Overview of Performance Optimization Function 1 4 2 Performance improvement by ng of Business Data At initial binding for the business for which business data is bound on a low speed physical disk if you need to improve performance later due to increase of business or other reasons you can use the performance optimization function to replace data to a high speed physical disk to improve performance without stopping business In the example shown in Figure 1 3 performance of business using 1 001 is improved by replacing LDO1 on a low speed physical disk with the Work Disk for Optimization LD02 bound in a high speed physical disk area Business Performance Improvement Response Deterioration Application Application Application Application Server Server Server Server Pool000 Pool001 Low speed area High speed area Replacement of Logical Disk Replacemen
3. LD Selection area when RANK pool is selected on Configuration Display Area or Detailed Display Area Specifies start date and end date of a period for displaying Target Pernod HEN the Busy Ratio Graph The order in which the Number Type and LD Name columns are displayed in the LD Selection area differs depending on the setting of the SnapSAN Manager client underlined Display in numerical order Number Type LD Name Status are displayed in this order Display in alphabetical order Type LD Name Number Status are displayed in this order 44 Chapter 3 Operation of Performance Optimization Function GUI 2 3 Specifying display items on Busy Ratio Graph On the Busy Ratio Graph dialog select RANKs pools or logical disks to be displayed on a Busy Ratio Graph specify start date or end date and then click the Show Graph button Up to 8 RANKs pools or 8 logical disks are selectable for displaying at the same time Downloading optimization log files that records Busy Ratio Clicking Show Graph button on the Busy Ratio Graph dialog displays Download Selection dialog Figure 3 13 shows an example of Download Selection dialog Table 3 13 describes the radio buttons on the Download Selection dialog Download Selection The data for target period is insufficient Show graph using data already downloaded men Figure 3 13 Download Selection Dial
4. 4 Configuration Display Area 8 Status Bar Figure 3 1 AutoTier Screen 21 Chapter 3 Operation of Performance Optimization Function GUI The screen is divided into eight areas from 1 to 8 as shown in Figure 3 1 Descriptions for each area are as follows If you log into the system to which the partitioning function is installed as a partition user only the resources of the partitions the user can manage are displayed in the display area The order in which the Number Type and LD Name columns are displayed on each screen differs depending on the setting of the SnapSAN Manager client For details on the setting method refer to the Client Start Stop of the User s Manual or User s Manual UNIX in accordance with your OS The order on each screen is described in the explanation of the related screen 1 Menu Bar Select necessary items from the menu to perform operations For details refer to Help 2 Tool Bar Among menu functions buttons for frequently used menu functions are provided to enable the one click operation For details about each button refer to Help Menu functions provided as tool bar buttons Save Settings Start LD Movement Stop LD Movement Change LD Movement Speed Change LD Movement Schedule Analysis Property Replacement Plan Replacement Effect Prediction Busy Ratio Graph 3 Analysis Period Display Area Displays the current anal
5. For details on the thin provisioning function refer to Thin Provisioning User s Manual When the thin provisioning function is available the LD capacity quota might be exceeded or the capacity of the pool including the source logical disk might be insufficient if allocation to the destination logical disk occurs while the logical disk is being moved without interrupting the operation In such a case the logical disk is successfully moved but after that the data of the destination logical disk must be recovered If the logical disk is moved with the LD capacity threshold LD capacity quota settings cancelled or if the logical disk is moved assuming that the destination logical disk is an actual capacity logical disk the moved logical disk might not be fault over quota or fault over capacity Identify a faulty logical disk by referring to the message output to the SnapSAN Manager operation log and then recover the data in it For details about how to recover data when fault over quota or fault over capacity occurs refer to Thin Provisioning User s Manual When a logical disk bound in an encryption disk is to be moved to a non encryption disk a destination logical disk will be decrypted 68 Chapter 3 Operation of Performance Optimization Function GUI 66 ______ _ _ _ _ _ 2 Viewing move
6. 77 Chapter 4 Operation of Performance Optimization Function CLI 4 2 Logical Disk Movement Speed Modification Command The LD movement speed can be changed by the command operation as well as the screen operation on the client screen of performance optimization function previously explained If a shell script or batch file is prepared beforehand the modification of LD movement speed can be scheduled by using the command Use the SnapSAN Managerprfctl command to change the LD movement speed For details on the SnapSAN Managerprfctl command synopsis refer to the SnapSAN Manager Command Reference 1 Command specification Use the LD movement speed modification function chgspeed_ldmv of the SnapSAN Managerprfctl command to change the LD movement speed If you must quickly complete moving the data or reduce load on the business system due to LD movement and therefore change the LD movement speed by the command check for necessary information on the client screen of performance optimization function beforehand Then specify the information in the command options The following information needs to be specified in the SnapSAN Managerprfctl command e Disk Array Name Name of the Disk Array Subsystem containing the Moved Material Logical Disk Specify the name in the arrayname option e Source LD A logical disk on the RANK pool where data is being moved or scheduled to be moved The logical disk number or name should be
7. Cache segment_2 Execution of Replacement Replacement I I I I I I I Partition A Partition node000 node001 node000 node001 If cache segment capacity of the destination node is smaller than that of the source node and the load to the cache segment of the destination node is higher than the load to the cache segment of the source node performance may not be improved even if replacement is executed When replacement is executed between logical disks that belong to different nodes you need to consider cache segment capacity and performance of cache segments adequately 16 Chapter 2 Installation of Performance Optimization Function Chapter 2 Installation of Performance Optimization Function 2 14 Server Installation 2 1 1 Operating Environment The operating environment of the target hardware operation OS memory and disk Capacity is the same as that of SnapSAN Manager For the operating environment refer to the installation guide For details on the required program products and target storage refer to Functions of Optional Software in the Manual Guide You need to unlock the licenses of the performance optimization function and required program products for the disk array to be applied when installing the performance optimization function 2 1 2 Installation The performance optimization function is simultaneously installed when the SnapSAN Manager is ins
8. numbers are displayed in a row For other than disk arrays with pool Pool No Displays the pool number for which the logical disk has been bound For disk arrays with pool Pool Name Displays the pool name for which the logical disk has been bound For disk arrays with pool PD Type Displays the type of physical disks configuring the logical disk The same information as the PD Type of the logical disk displayed in the state monitoring screen of the SnapSAN Manager is displayed Snapshot Type Displays the snapshot type of the logical disk The same information as the snapshot type of the logical disk displayed in the state monitoring screen of the SnapSAN Manager is displayed When the snapshot is installed Cache Resident Displays the cache resident state of the logical disk The same information as the logical disk resident displayed in the state monitoring screen of the SnapSAN Manager is displayed Data Protection Displays whether a logical disk is protected or not The same information as the logical disk resident displayed in the state monitoring screen of the SnapSAN Manager is displayed When the data retention function is installed If a failure occurs in the virtual capacity pool due to fault over capacity or fault over quota a logical disk cannot be moved In such a case restore the virtual capacity logical disks and then move the logical disks If writing fails in the virtual capacity logical disk due t
9. 11 48 52 63 64 65 Start LD movement 58 60 ruri d M 32 91 T tol Dat omitted ER ERR 22 tuning U utilization ratio of a disk array subsystem 20 V viewing movement progress operation register movement schedule sese 67 Work Disk for Optimization eese 12 18 Work Disk for Optimization display area 29
10. Pool Name PD Type Snapshot Type Cache Resident Data Protection t 000dh CX Batch Ready 1 2 0 VSPAR 00h 0010h 0000 SAS BY J 4ah N Batch hed 1 SPAR 001 0000 5 5 Mdh Batch Moving SPAR D 001 Pool0000 SAS Bi 004d 1 2 0 1 tid 0050h Cx Batch Ready 0 1 2 0 VSPAR 00h 0010h Pooloo00 5 5 BY Figure 3 6 Example of Display of Logical Disk List Table 3 5 Display Items of Logical Disk List Display Item Description Number Displays icons and numbers of logical disks Similar to RANK pools icons logical disks icons are also displayed in the three stages expressed in different colors depending on Busy Ratio e When the logical disk is in the Ready mode Busy High 4 09 Busy Ratio Medium to Busy Ratio Low 09 Busy Ratio No information tp e When the logical disk is not in the Ready mode A Faut a o Type Displays the type of volume of the logical disk Displays the same information of the logical disk type that is displayed on the SnapSAN Manager state monitoring screen LD Name Displays nicknames of logical disks Status Ready Indicates the normal state Moving Indicates that the logical disk is being moved Scheduled Indicates that movement of applicable logical disk has been registered in schedule a Indicates that a sensitive event formatting etc occurred or a logical disk is in the
11. Em SnapSAN AutoTier User Guide August 2012 10400408 001 overland storage 2012 Overland Storage Inc All rights reserved Overland Overland Data Overland Storage ARCvault DynamicRAID LibraryPro LoaderXpress Multi SitePAC NEO NEO Series PowerLoader Protection OS REO REO 4000 REO Series Snap Appliance Snap Care EU only SnapServer StorAssure Ultamus VR2 and XchangeNOW are registered trademarks of Overland Storage Inc GuardianOS RAINcloud SnapDisk SnapEDR Snap Enterprise Data Replicator SnapExpansion SnapSAN SnapScale SnapServer DX Series SnapServer Manager SnapWrite and SnapServer Manager are trademarks of Overland Storage Inc All other brand names or trademarks are the property of their respective owners The names of companies and individuals used in examples are fictitious and intended to illustrate the use of the software Any resemblance to actual companies or individuals whether past or present is coincidental PROPRIETARY NOTICE All information contained in or disclosed by this document is considered proprietary by Overland Storage By accepting this material the recipient agrees that this material and the information contained therein are held in confidence and in trust and will not be used reproduced in whole or in part nor its contents revealed to others except to meet the purpose f
12. menu on the main screen of the performance optimization function for settings upon activating next time 1 Specification of the Busy Ratio range Use spin buttons provided for the Busy Ratio range with the yellow signal to specify the three stages of the Busy Ratio range Specifying the upper limit value of the yellow zone automatically results in specifying the limit value 1 as the lower limit of red danger zone On the other hand specifying the lower limit value of the yellow caution zone automatically results in specifying the limit value 1 as the upper limit of blue safety zone ii Setting Busy Ratio zones Clicking OK button on the Setup the Busy Ratio dialog screen will activate the specified Busy Ratio zones Clicking Cancel button will cancel the Busy Ratio zones and restore the original Busy Ratio Zones 40 Chapter 3 Operation of Performance Optimization Function GUI 3 2 3 Setting Folder to Store Data For executing Busy Ratio Graph and Replacement Effect Prediction functions the optimization log files recording the Busy Ratio information must be downloaded from the SnapSAN Manager server to SnapSAN Manager client and must be stored in a folder to store data The folder to store data for storing downloaded optimization log files can be created in an arbitrary folder This section describes the dialog for setting the folder to store data and the setting procedures 1 Displaying
13. 20 shows an example of the Replacement Effect Prediction screen Table 3 18 describes the areas on Replacement Effect Prediction screen Graph Display Area Graph Scale Setting Area Replacement Effect Prediction Storage4900 Target Period 2006 11 22 00 00 2006 12 21 19 00 Graph Scale Busy Ratio GA Ar ANAL ERE SAA AU P 01 00 02 00 Average Busy RatioT 10001 18 10002 0 PoolO001 10002 Legend Display Area Figure 3 20 Replacement Effect Prediction Screen 57 Chapter 3 Operation of Performance Optimization Function GUI Table 3 18 Description of Replacement Effect Prediction Screen Area Description Graph Scale setting area Selects a time range of Replacement Effect Prediction Graph on screen A range is specified by hours 3 6 12 24 days 1 to 31 or weeks 1 to 4 Setting is allowed within a period specified by the target period area on the Graph Indicating Replacement Effect Prediction dialog Upon activation of the Prediction of Replacement screen all ranges specified for the target period are displayed on one screen Graph display area Changes of Busy Ratios of source and destination RANKs pools before and after moving is displayed in graphs Vertical axis Indicates Busy Ratio Horizontal axis Indicates target period Period indicated by markings is variable by value of Graph scale setting area Horizontal axis labe
14. 3 16 Description of Graph Indicating Replacement Effect Prediction Dialog Area Description Specifies start date and end date of a period for displaying Target Period Replacement Effect Prediction graph 2 Specify period for Replacement Effect Prediction On the Graph Indicating Replacement Effect Prediction dialog specify a period for Replacement Effect Prediction of logical disks Specifying a period when a bottleneck occurred makes it easier to know the effect of replacing applicable logical disks Specify a start date and end date and then click the Show Graph button 3 Download performance optimization log file containing Busy Ratios Clicking Show Graph button on the Graph Indicating Replacement Effect Prediction dialog displays the Download Selection dialog Figure 3 18 shows an example of Download Selection dialog Table 3 17 describes the radio buttons on the Download Selection dialog Download Selection The data for target period is insufficient C Show graph using data already downloaded meer Figure 3 18 Download Selection Dialog 55 Chapter 3 Operation of Performance Optimization Function GUI Table 3 17 Description of Download Selection Dialog Radio Button Description Downloads optimization log file recording Busy Show graph after downloading insufficient data Ratios onto the SnapSAN Manager client Displays Busy Ratio Graph without downloading
15. 4 Operation of Performance Optimization Function CLI auto or high in the same manner as for screen operation The default is auto as the recommended speed e LD capacity threshold LD capacity quota settings This command option specifies whether the destination logical disk takes over the LD capacity threshold and LD capacity quota set to the source logical disk when the source and destination logical disks are virtual capacity logical disks You can specify whether to take over or cancel the settings The settings are taken over by default Predetermine the combination of a source logical disk and a Work Disk for Optimization so that the RANK pool Busy Ratio will be leveled To do so use the client screen of AutoTier Consider the business operation state when moving a logical disk and specify the optimum volume movement speed The following shows examples of specifying the SnapSAN Managerprfctl command Example 1 Move data between the logical disk 000ah and the Work Disk for Optimization 0010h Select the default volume movement speed auto SnapSAN Managerprfctl start ldmv arrayname storagel ldn ah wkldn 10h Example 2 Move data between the logical disk 000ah and the Work Disk for Optimization 0010h Select the maximum data transfer rate high as the volume movement speed SnapSAN Managerprfctl start ldmv arrayname storagel ldn ah wkldn 10h spee
16. Analysis Property dialog Folder to Store Data tab Select Setting Analysis Property menu on the main screen of the performance optimization function On the displayed Analysis Property dialog box select Folder to Store Data tab that displays an area for specifying a folder to store data Or when Busy Ratio Graph and Replacement Effect Prediction functions are displayed and the Confirmation of Overwriting dialog is displayed clicking Change Folder button displays this dialog Figure 3 11 shows an example of displayed Analysis Property dialog Folder to Store Data tab and Table 3 11 provides description of the tab in the dialog Analysis Property Analysis Period Sort of Busy Ratio Folder to Store Data C Program Files NEC iSMClient T MP Browse Setup the folder to store data which is used to draw busy ratio graph and replacement effect prediction E Cancel Help Figure 3 11 Analysis Property Dialog Folder to Store Data Tab 41 Chapter 3 Operation of Performance Optimization Function GUI Table 3 11 Description of Analysis Property Dialog Folder to Store Data Tab Tab Description Folder to Store Data Specifies a folder to store data 2 Setting Folder to Store Data Enter an arbitrary folder as a folder to store data or click the Browse button and select a directory on the Browse for Folder dialog After specifying a folder to store data click
17. Disks for Optimization the estimated Busy Ratio of the pools for the Work Disks for Optimization is displayed Note Ifthe RAID type of the Work Disk for Optimization is different from that of the moved material logical disk if the moved material logical disk is bound in the dynamic pool or if the RAID type is RAID10 or RAIDSO the Busy Ratio after the disk movement cannot be estimated therefore a string of asterisks is displayed For disk arrays with pool RAID Displays the RAID type of Work Disks for Optimization PD Type Displays the type of physical disks configuring the Work Disk for Optimization The same information as the PD Type of the logical disk displayed in the state monitoring screen of the SnapSAN Manager is displayed If the work disk for optimization is a virtual capacity logical disk the LD capacity threshold or LD capacity quota cannot be set It is also impossible to set the logical disk for which LD capacity threshold or LD capacity quota is set as a work disk for optimization For details refer to Thin Provisioning User s Manual 31 Chapter 3 Operation of Performance Optimization Function GUI 7 Movement Progress Information Display Area A list of progress information about movement of logical disks is displayed Figure 3 8 shows an example of display of disk transfer progress information Table 3 7 provides descriptions of each display item The order in
18. Graph display area Fluctuations of Busy Ratios of RANKs pools or logical disks are displayed in graphs A maximum of 8 graph lines are displayed Vertical axis Indicates Busy Ratio Horizontal axis Indicates target period Period indicated by markings is variable by value of Graph scale setting area Horizontal axis label Indicates graph display time Display intervals by a label are as follows 1 hour period 20 minute interval 2 hour period 30 minute interval 3 hour period or longer Interval variable by value specified in Graph scale setting area Legend display area Displays the items listed below Number Indicates icons and numbers of RANKs pools or logical disks Type Indicates logical disk type Displayed only when Busy Ratio of logical disks are shown LD Name Indicates logical disk name Displayed only when Busy Ratio of logical disks are shown e Average Busy Ratio 26 Indicates an average Busy Ratio within the target period Note When the configuration of the relevant RANK pool is changed during the target period including the logical disk movement this ratio is calculated based on the information after the configuration is changed However if there is no data to be calculated during the target period a string of asterisks is displayed Maximum Busy Ratio Indicates a maximum Busy Ratio within the target period Note When the configuration of the relevant RANK pool is
19. Medium 05 RANK RANE Busy Ratio Low Busy Ratio No information P e When the RANK pool is not in the Ready mode Attn ae A Faut a Qo An icon for the disk array which is not monitored by the SnapSAN Manager server is displayed in gray 23 Chapter 3 Operation of Performance Optimization Function GUI 5 Detailed Display Area Lists detailed information of the component located one layer below the layer selected in the configuration display area When the SnapSAN Manager server is selected Disk array list is displayed When the disk array is selected RANK pool list is displayed When the RANK pool is selected Logical disk list is displayed Displayed items of the disk array RANK pool and logical disk lists will be described below Disk array list Figure 3 3 shows an example of display of the disk array list Table 3 2 provides descriptions of each display item Disk Array Subsystem Monitoring State Logging State Logging Start Time Logging End Time D8 10 1 Running Accumulate 2007 12 22 14 39 2007 12 22 15 29 Figure 3 3 Example of Display of Disk Array List Table 3 2 Display Items of Disk Array List Display Item Description Disk Array Displays the icon and nickname of the disk array Subsystem Monitoring Status Running a Indicates that the SnapSAN Manager server is monitoring the stat
20. OK button After specifying a folder to store data executing downloading operation downloads the performance optimization log file in the specified directory When Busy Ratio Graph or Replacement Effect Prediction function is activated the information is displayed on the basis of the performance optimization log file stored in this folder 42 Chapter 3 Operation of Performance Optimization Function GUI 3 2 4 Showing the Busy Ratio Graph The Busy Ratio of logical disks and RANKs pools can be displayed using time series graphs as well as by the numeric values displayed on the Detailed Display Area If you log into the system to which the partitioning function is installed as a partition user only the resources of the partitions the user can manage can be displayed in graphs This section describes the dialog for showing the Busy Ratio Graph and the displaying procedures 1 Showing the Busy Ratio Graph For selecting the applicable items for displaying Busy Ratio in graph display the Busy Ratio Graph dialog Three procedures are provided for displaying Busy Ratio Graph dialog Open the Busy Ratio Graph dialog by one of the following three procedures Popup menu Select disk array or RANK pool on the Configuration Display Area or Detailed Display Area and display a popup menu by right clicking Select Busy Ratio Graph on the popup menu Menu Select disk array or RANK pool on the Configuration Disp
21. Resident Data Protection TK 000dh Batch Ready 2 0 0010h Pooloooo t 004ah Mx Eia 004ah NX Batch Moving 70 2 0 010 0000 Double clicking a logical disk The Busy Ratio of the source will display destination RANK pool is displayed in the candidate Work Disks for Before movement After Optimization movement format Moved Material Logical Disk Disk Array Subsystem Work Disk for Optimization m Qv Pool 025 wk O NLINE 0511 Moving 0025h Pool0025 wN wk ONLIME 0512 Moving 0025h Pool0025 D 4 CX wk ONLIME 0514 Ready 0025h Pool0025 The Busy Ratio of the destination RANK pool is displayed in the Before movement After movement format Figure 3 22 Selecting Moved Material Logical Disks Selecting Work Disk for Optimization iii Start LD Movement Register LD Movement Schedule After deciding a logical disk to be moved and work disk for optimization start moving or register a movement schedule Start of moving or registration of moving is specified on the Start LD Movement dialog Four procedures are provided for displaying the Start LD Movement dialog Display the Start LD Movement dialog with one of the following procedures Popup menu Select a work disk for optimization of the movement target on the Work Disk for Optimization Display Area and display a popup menu by right clicking Select Start LD Movement on the popup menu Menu
22. Select a work disk for optimization of the movement target on the work disk for optimization display area and select Operation Start LD Movement Tool Bar button Select a destination Work Disk for Optimization from the Work Disk for Optimization Display Area and then click the Start LD Movement button on the tool bar 62 Chapter 3 Operation of Performance Optimization Function GUI Replacement Plan dialog Click the Start LD Movement button on the Replacement Plan dialog Refer to 3 2 5 Replacement Plan for details on Replacement Plan dialog When the following conditions are met the confirmation dialog is displayed e work disk for optimization which was bound on a node other than the node including a logical disk to be moved was selected A logical disk to be moved which was bound in an encryption disk and a work disk for optimization which was bound in a non encryption disk was selected 04404 Please note about the Following Factors The source logical disk moves to a different node The data will be unencrypted after move Is it OK Figure 3 23 Confirmation Dialog When you click the OK button on this dialog the Start LD Movement dialog is displayed Figure 3 24 shows an example of displayed Start LD Movement dialog and Table 3 19 provides descriptions of the areas in the dialog 63 Chapter 3 Operation of Performance Optimization Function GUI Start LD Movem
23. Show graph using data already downloaded optimization log file Selecting Show graph after downloading insufficient data and clicking OK button downloads the performance optimization log files accumulated on the SnapSAN Manager server onto the SnapSAN Manager client and the optimization log files stored in a folder to store data is updated into a latest file For the folder to store data refer to 3 2 3 Setting Folder to Store Data Selecting Show graph using data already downloaded and clicking OK button results in estimating replacement effect without downloading performance optimization log files form the SnapSAN Manager server In this case replacement effect is estimated for a log accumulation period of the optimization log files that have already been downloaded If the optimization log files of the specified period have already been downloaded for estimating replacement effect the Confirmation of Overwriting dialog is displayed Figure 3 19 shows the Confirmation of Overwriting dialog Confirmation of Overwriting The data of an analysis period already exists in the following folders Overwrite it Folder to Store Data C Program Files NEC iSMClient T MP B Cancel Change Folder Help Figure 3 19 Confirmation of Overwriting Dialog Clicking OK on the Confirmation of Overwriting dialog overwrites the existing data Click the Change Folder button allows changing the folders to store data to be do
24. When specifying a specific day of the week as an analysis target day activate the specification area check box for the target day of the week Time Zone to Calculate When specifying a specific time zone period of time as an analysis target you specification area can specify the time zone period of time in the format of x Hour y Min To n Hours n hours from x o clock y 36 Chapter 3 Operation of Performance Optimization Function GUI 2 Procedures for setting analysis period This section describes the procedures for specifying an analysis period on the Analysis Property dialog Analysis Period tab The specified analysis period can be saved by selecting File Save Settings menu on the main screen of the performance optimization function for settings upon activating next time 1 Specification of the period You can specify the period by selecting Absolute Date or Period to Calculate The usage of Absolute Date and Period to Calculate is described below Effectively select either one of them according to the purpose of analysis e Absolute Date Select this function to analyze a specific period in the past e Period to Calculate Select this function to analyze data in a specified period periodically such as daily weekly or monthly For example if you set the period from six days ago to the present you can perform weekly analysis of the week without changing settings ii Specification
25. are different in capacity A moved material logical disk is multi RANK type Movement start time has already past the time on the server Specified source or destination logical disks are already in moving process Movement schedule has been registered for a specified source or destination logical disk A source logical disk is a cache resident disk A disk array is not being monitored by SnapSAN Manager A disk array RANK and logical disk are in the fault state A source logical disk is multi RANK type A source logical disk is formatting 66 Chapter 3 Operation of Performance Optimization Function GUI For disk arrays with pool The user role is monitor A moved material logical disk is located in the same pool as a Work Disk for Optimization A moved material logical disk and a Work Disk for Optimization are different in capacity Movement start time has already past the time on the server Specified source or destination logical disks are already in moving process Movement schedule has been registered for a specified source or destination logical disk A source logical disk is a cache resident disk A disk array is not being monitored by SnapSAN Manager A disk array pool and logical disk are in the fault state A source or destination logical disk is formatting except ready formatting of the logical disk in a dynamic pool A logical disk is a snapshot related volum
26. changed during the target period including the logical disk movement this ratio is calculated based on the information after the configuration is changed However if there is no data to be calculated during the target period a string of asterisks is displayed Maximum Busy Ratio Detection time Indicates time when a maximum Busy Ratio was detected 48 Chapter 3 Operation of Performance Optimization Function GUI The order in which the Number Type and LD Name columns displayed in the legend display area differs depending on the setting of the SnapSAN Manager client underlined Display in numerical order Number Type LD Name Average Busy Ratio are displayed in this order Display in alphabetical order Type LD Name Number Average Busy Ratio are displayed in this order Upon activation of the Busy Ratio Graph screen the Busy Ratio Graphs all ranges specified for target periods on one screen For changing graph scale specify a range to be displayed on one screen hours 3 6 12 24 days 1 to 31 or weeks 1 to 4 and then click the Apply button If system configuration is changed within a target period including movement of logical disks the graph lines become discontinuous The average maximum Busy Ratios after a configuration change are calculated on the basis of the system configuration after the changes If configuration change is perfo
27. does not decrease due to the setting of Work Disks for Optimization 20 Chapter 3 Operation of Performance Optimization Function GUI Chapter 3 Operation of Performance Optimization Function GUI This chapter will describe the composition of the AutoTier dedicated client screen and its method of operation 3 1 Description of Screen Figure 3 1 shows the AutoTier main screen This section will describe the composition of the screen 2 Tool Bar 1 Menu Bar 3 Analysis Period Display Area 5 Cotimizer 08 10 110001h Hours Week C Analysis Period 2007 12 20 2008 01 19 00 00 23 59 7 Monl Tue Wed IF 7 Sat 7 Sun Partition Name Node N Cache Data Protection T 20 VsPAR 00h 0001h Batch_DISK_0025 Ready 20 SPAR 00h O001h 10001 Batch_DISK_0026 Ready 20 SPAR 00h 0001h Pool0001 0001 e DEL 5 Detailed Display Area 027 Batch DISK 0028 Ready DISK 0 cheduled m ES 00h 0001h p Moved Material Logical Disk Disk Array Subsystem D8101 0001h LD No 0531h Pool Work Disk for Optimization WN WN wk ONLINE 0031 wk ONLINE 0032 6 Source LD Name Destination LD Destination LD Name Destination Partiti Status e an DISK VSPAR 707 TR TITETIT Scheduled WN Batch DISK VSPAR Pool0000 0013h WN wk ONLINE 0023 Moving 7 Movement Progress Information Display Area 10 Working
28. information for the movement schedule is being changed Schedule Canceled Indicates that registration of the movement schedule has been canceled Schedule Failed Indicates that execution of the registered movement schedule has failed Fault Indicates that abnormal termination of movement has occurred in midstream due to a fault Progress 46 Displays the movement progress ratio in percentage Speed of Movement By moving a logical disk all data contained in the source logical disk is copied to the destination Work Disk for Optimization This area displays the speed of moving the data Displayed contents are as follows auto The movement speed is automatically adjusted according to the operating state of the disk array high A disk is moved at maximum data transfer speed Start Time Displays the disk transfer start time Chase pes pick 1s displayed before the movement information is obtained from the disk array However if the status is scheduled the disk transfer scheduled time is displayed End Time Displays the disk transfer end time A blank is displayed if the status is Moving or Scheduled If the status is Schedule canceled time of canceling the schedule is displayed and if the status is Interrupted or Fault time of interrupting movement is displayed 8 Status Bar Displays the operating state of the AutoTier client Table 3 8
29. not in use state by the power saving function Fault media error Indicates that a media fault occurred Faut aaa Indicates that a RANK pool fault occurred In the case of virtual capacity logical disk this indicates that the LD capacity threshold and LD capacity quota are exceeded 28 Chapter 3 Operation of Performance Optimization Function GUI Display Item Description Busy Ratio Displays the Busy Ratio of the logical disk For the RANK that does not have valid Busy Ratio information an asterisk is displayed Note When a logical disk in the RANK pool is moved Busy Ratio information which has been accumulated is no longer related with Busy Ratio information which is to be accumulated after the movement Therefore immediately after a logical disk has been moved there is no valid Busy Ratio information for the RANK pool This state will be cancelled when Busy Ratio information is accumulated at the next interval RAID Displays the RAID type of the logical disk Capacity GB The capacity of the logical disk is displayed in GB Partition Name Displays the name of the partition to which the logical disk belongs When the partitioning function is installed Node No Displays the number of the node to which the logical disk belongs For disk arrays with node RANK Displays the RANK number for which logical disks have been bound For the multiple RANK types all Ranks
30. of Performance Optimization Function cccccccccsssssssseceeeessessesssaeeeeess 3 1 5 FUNCTION OVERVIEW e p M 11 1 6 Concurrent Use of Partitioning Function cesses eene nnne nennen nnns nn 14 Chapter2 Installation of Performance Optimization Function 17 2 1 Server Installation iiu ert eiae eene 17 2 2 Client Installation sca eL 17 2 3 Installation of Work Disks for OptiMiZation cccccccccccsssssssscecececesseseceeseceeecesseseaeseeeesensees 18 Chapter3 Operation of Performance Optimization Function 21 3 1 Description of SCre nic t eaa deiei ceti eee Een e cn Me 21 3 2 Operation On Screens succi ci rU P CERE EORR ED P RN OIN UNE 35 Chapter 4 Operation of Performance Optimization Function 74 4 1 Logical Disk Movement Command 74 4 2 Logical Disk Movement Speed Modification Command sese 78 AppendixA X Estimating Size of Files for Auto Tier Function nnn 77 Appendix B LICENSES ie ott D ED pm on dere vehe 79 B 1 Apache log4j License ce ee Ie sauces ge dE 79 B 2 gH Ie 85 B 3 GI KMIMEDTMICSNEREBRU REDIT 86 Chapte
31. of the days of the week Specify the analysis target days of the week i11 Specification of the time zone Specify the analysis target time zone A time zone spanning over two days e g 8 hours starting from 20 00 can be specified iv Determination of the analysis period When you specify a period days of the week and time zone and then click the OK button on the Analysis Property dialog screen the specified analysis period is registered Clicking the Cancel button will cancel the specified analysis period and restore the original analysis period The analysis period is set under the power conditions of the period the day s of the week and the time zone that have been specified The following is the examples of the analysis period setting Example Setting analysis period Analysis Period to be specified From 10 00 to 17 00 on Thursdays Fridays and Saturdays for the past 20 days Assume that the current date is January 31 2002 37 Chapter 3 Operation of Performance Optimization Function GUI Specification on the Setup the Analysis Period dialog screen Period Absolute Date Specify the start day and end day as follows Opening 2002 Year 01 Month 11 Day End 2002 Year 01 Month 31 Day Period to Calculate Specify from 20 days before to the present Day of the Week to Calculate Activate check boxes of Thursday Friday and Saturday Time Zone to Calculate Specify 7 hours from 10 00 38 Chapter 3 Operat
32. specified Specify the logical disk number in the Idn option or the logical disk name in the Idname option e LD movement speed Speed at which data is copied when a logical disk is moved The speed can be specified by selecting auto or high in the same manner as for screen operation Before changing the LD movement speed carefully consider the operation status when a logical disk is moved and specify the optimal speed The following shows examples of specifying the SnapSAN Managerprfctl command Example 1 LD movement is executed between the logical disk 000ah and the Work Disk for Optimization 0010h The default LD movement speed auto is currently used Change this LD movement speed from default auto to the maximum data transfer rate 78 Chapter 4 Operation of Performance Optimization Function CLI SnapSAN Managerprfctl chgspeed ldmv arrayname storagel ldn ah speed high Example 2 The schedule of the logical movement between the logical disk 000ah and the Work Disk for Optimization 0010h is registered The LD movement speed for the registered schedule is the maximum data transfer rate high Specify a volume name to change the LD movement speed from the maximum data transfer rate to default auto SnapSAN Managerprfctl chgspeed ldmv arrayname storagel ldname VOL000ah speed auto 2 Confirming change in LD movement speed The chgspeed ldmv function of the SnapSAN Managerprfctl comm
33. state A logical disk is a snapshot related volume except the BV Note 1 A source or destination logical disk is formatting except ready formatting of the logical disk in a dynamic pool A source logical disk is a System Volume A source logical disk to which data protection setting has already been set A source or destination logical disk is in the not in use state by the power saving function A pool in which a specified source or destination logical disk has been bound is expanding A source logical disk and a destination logical disk belong to different partitions and the partition allocation of the pool in which the source logical disk or the destination logical disk is bound is Exclusive A source logical disk and a destination logical disk belong to different partitions and the destination logical disk is bound in a different node from that of the source logical disk logical disk virtual capacity logical disk is being released Note 2 Note 1 BV base volume original volume which is the copy source Note 2 For details about how to release the capacity refer to the Thin Provisioning User s Manual LD movement schedule cannot be registered in the following cases For other than disk arrays with pool The user role is monitor A moved material logical disk is located in the same RANK as a Work Disk for Optimization A moved material logical disk and a Work Disk for Optimization
34. the obtained Busy Ratio for each physical disk on the dedicated client screen Analysis of the Busy Ratio displayed on the dedicated client screen allows you to detect a physical disk bottleneck location in which I O concentrates The AutoTier features the following display of the Busy Ratio which enables the analysis suitable for the business system and visual detection of the bottleneck The analysis period Busy Ratio calculation period can be specified in terms of the exponent condition for the date days of the week and time zone Display a Busy Ratio in three level with color coding Display over time changes of Busy Ratio in three different colors 1 5 2 Replacement Plan Upon detecting a physical disk with concentrated I Os bottleneck part logical disks are moved replaced to tune performances This function displays information about the movement destination logical disks which are best suited for the source logical disk This function automatically finds the destination logical disks that are highly effective for I O distribution after moving disks and displays the disks in the order of effectiveness An administrator is allowed to tune the performances on the basis of the information and remove the bottleneck 1 5 3 Replacement Effect Prediction EHEHHEEHEHHHEHRHEHEHEHNHEHRHEEHREHEHRHERHERHERHRHEEHHHEHEHERHEHRHERHERHEREHEHEHREHRHEHEHEHEHEHRHEHENHHRHEHENERENH An effect of load distribution after logical disk moveme
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36. you may not use this file except in compliance with the License You may obtain a copy of the License at http www apache org licenses LICENSE 2 0 Unless required by applicable law or agreed to in writing software distributed under the License is distributed on an AS IS BASIS 83 Appendix Licenses WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND either express or implied See the License for the specific language governing permissions and limitations under the License 84 Appendix Licenses B 2 Flex License The flex manual is placed under the same licensing conditions as the rest of flex Copyright c 2001 2002 2003 2004 2005 2006 2007 The Flex Project Copyright c 1990 1997 The Regents of the University of California All rights reserved This code is derived from software contributed to Berkeley by Vern Paxson The United States Government has rights in this work pursuant to contract no DE AC03 76SF00098 between the United States Department of Energy and the University of California Redistribution and use in source and binary forms with or without modification are permitted provided that the following conditions are met Redistributions of source code must retain the above copyright notice this list of conditions and the following disclaimer Redistributions in binary form must reproduce the above copyright notice this list of conditions and the following disclaimer in the documentation and o
37. 3 28 shows an example screen of Change LD Movement Schedule dialog Change LD Movement Schedule Movement schedule of the following logical disk is changed Disk Array Subsystem Storage4900 Logical Disk 050eh NX ONLINE DISK 07 Movement Speed C high auto Copy at the optimal speed high Copy at the maximum speed Start Schedule 2006 Year 12 v Mon 24 Day 02 v Hour zo T Min start within 124 Hours Specify the time to continue re execution when start movement or cannot start movement Change Schedule Cancel Schedule Close Help Figure 3 28 Change LD Movement Schedule Dialog iii Change cancel movement schedule For changing time of starting disk movement or time of continuing re execution Change the setting value and click the Change Schedule button Forcanceling disk movement schedule Click the Cancel Schedule button 73 Chapter 4 Operation of Performance Optimization Function CLI Chapter 4 Operation of Performance Optimization Function CLI This chapter explains how to operate a command provided by AutoTier The command provided by AutoTier can be executed on the server on which SnapSAN Manager is operating 4 1 Logical Disk Movement Command Logical disks can be moved by the command operation as well as the screen operation on the client screen of AutoTier previously explained If a shell script or batch file is prepared beforehand the movement of logical disks can be
38. BV Note 1 A logical disk is a System Volume A logical disk to which data protection setting has already been set A logical disk virtual capacity logical disk is being released Note 2 Note 1 BV base volume original volume which is the copy source Note 2 For details about how to release the capacity refer to the Thin Provisioning User s Manual 13 Chapter 1 Overview of Performance Optimization Function 1 6 Concurrent Use of Partitioning Function The partitioning function partitions resources disk cache memory and port of a disk array on a logic basis such as business to bind and manage virtual storage VSPAR Virtual Storage Partition that has independent resources For details on the partitioning function refer to the Partitioning User s Manual The performance optimization function implements more efficient performance tuning operation by concurrent use of the partitioning function In the partitioning function the virtual storage described above is referred to as a partition A user who performs operation management of a specific partition is referred to as a partition user A storage group user user who performs operation management of all disk arrays gives authorization to operate a specific partition to a partition user A partition user is also classified into some user roles as in the case of a storage group user and can operate the functions provided by performance optimization for the pa
39. Function 2 3 2 Placement of Work Disks for Optimization Generally a bottleneck in performance occurs due to an increase of the amount of data which results from an increase of the amount of work or an access pattern change If the amount of the business increases usually the load is distributed by adding physical disks When tuning performance with the performance optimization function arrange Work Disks for Optimization and move logical disks from high load physical disks A tuning operation can be performed without stopping operations Work Disks for Optimization are to be used when the performance optimization function eliminates the cause of a bottleneck in performance There is no need to arrange them when installing a disk array subsystem To place work disks for optimization the following conditions must be satisfied according to the moved material logical disk e The capacity of the moved material logical disk must be identical to that of the Work Disk for Optimization e A Work Disk for Optimization needs to be placed in a RANK or pool in which the moved material logical disk is not placed The area of a Work Disk for Optimization is used from business after movement Therefore they must be placed appropriately based on understanding of performance characteristics Main points are as follows Load of a RANK or pool in which a Work Disk for Optimization is placed When a RANK or pool in which a Work Disk for Optimiz
40. ITUTE GOODS OR SERVICES LOSS OF USE DATA OR PROFITS OR BUSINESS INTERRUPTION HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY WHETHER IN CONTRACT STRICT LIABILITY OR TORT INCLUDING NEGLIGENCE OR OTHERWISE ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE This product includes cryptographic software written by Eric Young eay cryptsoft com This product includes software written by Tim Hudson tjh cryptsoft com Original SSLeay License Copyright C 1995 1998 Eric Young eay cryptsoft com All rights reserved This package is an SSL implementation written by Eric Young eay cryptsoft com The implementation was written to conform with Netscapes SSL 87 Appendix Licenses This library is free for commercial and non commercial use as long as the following conditions are adhered to The following conditions apply to all code found in this distribution be it the RC4 RSA hash DES etc code not just the SSL code The SSL documentation included with this distribution is covered by the same copyright terms except that the holder is Tim Hudson tjh cryptsoft com Copyright remains Eric Young s and as such any Copyright notices in the code are not to be removed Tf this package is used in a product Eric Young should be given attribution as the author of the parts of the library used
41. LIABLE FOR ANY DIRECT INDIRECT INCIDENTAL SPECIAL EXEMPLARY OR CONSEQUENTIAL DAMAGES INCLUDING BUT NOT LIMITED TO PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES LOSS OF USE DATA OR PROFITS OR BUSINESS INTERRUPTION HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY WHETHER IN CONTRACT 88 Appendix Licenses STRICT LIABILITY OR TORT INCLUDING NEGLIGENCE OR OTHERWISE ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE The license and distribution terms for any publically available version or derivative of this code cannot be changed i e this code cannot simply be copied and put under another distribution license including the GNU Public License 89 A AccessControl analysis period analysis period display area Analysis Property dialog Analysis Period tab 33 34 Analysis Property dialog Folder to Store Data tab 39 Analysis Property dialog Sort of Busy Ratio tab 37 38 B BasePtroduct 5i ih een eni aeo ob ipsins 2 bottleneck detection support T bottleneck location eene 11 cache resident 15 13 59 63 64 65 canceling LD Movement eee 68 capacity of a Work Disk for Optimization 19 Camon ZONE 38 change cancel of logical disk movement sc
42. Movement speed of the following logical disk is changed Disk Array Subsystem Storage4900 Logical Disk 050eh NX ONELINE DISK 07 Movement Speed auto C high auto Copy at the optimal speed high Copy at the maximum speed Close Help Figure 3 27 Change LD Movement Speed Dialog iii Specifying movement speed after change Select auto or high in the movement speed change area iv Executing change of moving speed Clicking OK button on the Change LD Movement Speed dialog displays a confirmation dialog Clicking Yes on the confirmation dialog changes the moving speeds Clicking No button cancels the change of moving speed Change cancel of logical disk movement schedule i Select logical disks of movement schedule to be changed or canceled On the Movement Progress Information Display Area click to select logical disks of movement schedule to be changed or canceled ii Display Change LD Movement Schedule dialog Three procedures are provided for displaying the Change LD Movement Schedule dialog Display the Change LD Movement Schedule dialog with one of the following procedures Popup menu Display a popup menu and select Change LD Movement Schedule on the popup menu Menu Select Operation Change LD Movement Schedule on the menu Tool Bar button Select Change LD Movement Schedule button on the toolbar 72 Chapter 3 Operation of Performance Optimization Function GUI Figure
43. Optimization Configuration Setting Tool User s Manual GUD LD Administrator User s Manual Optimization Replacing Execute replacement handling the prepared Work Disk for Optimization as the destination of movement 1 5 4 Performance Tuning 3 2 Operation on Screen 4 1 Logical Disk Movement Command Appendix A Command of Performance Optimization Function Verifying performance of the logical disk after replacement Verify that the replacement produces the expected result by using the performance monitoring function and the performance analysis function Performance Monitoring User s Manual Performance Analysis User s Manual 10 Chapter 1 Overview of Performance Optimization Function 1 5 Function Overview The performance optimization function provides the capability of Bottleneck Detection Support Replacement Plan Replacement Effect Prediction and Performance Tuning This section describes outlines of the functions 1 5 1 Bottleneck Detection Support Concentration of I O in a specific physical disk causes I O competition thereby deteriorating response The degree of concentration of I O in a physical disk can be indicated as the physical disk s operating time per unit time This value is expressed as the physical disk s Busy Ratio The AutoTier monitors the load state of physical disks at specified intervals and displays
44. This can be in the form of a textual message at program startup or in documentation online or textual provided with the package Redistribution and use in source and binary forms with or without modification are permitted provided that the following conditions are met Redistributions of source code must retain the copyright notice this list of conditions and the following disclaimer 2 Redistributions in binary form must reproduce the above copyright notice this list of conditions and the following disclaimer in the documentation and or other materials provided with the distribution 3 All advertising materials mentioning features or use of this software must display the following acknowledgement This product includes cryptographic software written by Eric Young eay cryptsoft com The word cryptographic can be left out if the rouines from the library being used are not cryptographic related 4 If you include any Windows specific code or a derivative thereof from the apps directory application code you must include an acknowledgement This product includes software written by Tim Hudson tjh Qcryptsoft com THIS SOFTWARE IS PROVIDED BY ERIC YOUNG AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
45. a Data can be placed optimally by moving business data that is not used frequently to a low priced physical disk with large capacity For details refer to 1 4 3 Optimal Placement of Data e Data migration when adding a node For a disk array with node Load of a node can be distributed by adding a node and moving business data from a high load node to the added node For details refer to 1 4 4 Data Migration When Adding a Node The performance optimization function can execute the above operations without stopping your business Operations of the performance optimization function are explained in the subsequent sections with examples Chapter 1 Overview of Performance Optimization Function 1 4 1 Resolution of Bottlenecks When I Os are concentrated and a physical disk is highly loaded it is possible to level the load without stopping business by moving a logical disk bound to the physical disk to a low load physical disk In the example shown in Figure 1 2 a bottleneck can be resolved by replacing LDO1 with Work Disk for Optimization LD02 and distributing I O concentrating to POOLO00 to POOLOO1 Application Application Application Server Server Application Server Resolution of Bottleneck Replacement of Logical Disk Pool001 Pool000 Pool001 Figure 1 2 Resolution of Bottlenecks Chapter 1 Overview of Performance Optimization Function _ESE LpE
46. and changes the LD movement speed If having changed the LD movement speed by executing the command confirm that the LD movement speed has been changed by the following methods e Modification of LD movement speed The LD movement speed can be confirmed by the message for the SnapSAN Managerprfctl command and the message that is output to the SnapSAN Manager operation log When data starts moving normally the following messages are output Message for the SnapSAN Managerprfctl command SnapSAN Managerprfctl 001 Message output to the SnapSAN Manager operation log SnapSAN Manager09004 3 Notes e The SnapSAN Managerprfctl command is executable only on the server on which SnapSAN Manager is operating Do not execute the command on an Application Server or while SnapSAN Manager is in the stopped state e The SnapSAN Managerprfctl command is available with a client PC only when Telnet is connected It is not available with Terminal Service 79 Appendix A Estimating Size of Files for AutoTier Function Appendix Estimating Size of Files for AutoTier Function For each disk array an AutoTier log for up to 2 months is accumulated in a file The capacity can be estimated by applying the number of disk array components the number of RANKs pools and logical disks LDs and logging interval time to the following equations The calculated capacity is assumed as a general case The actual capacity differs from the calculated one
47. aph Clicking OK button on the Download Selection dialog displays the Busy Ratio Graph screen The Busy Ratio Graph screen displays the graphs indicating fluctuations of Busy Ratio for specified logical disks or RANKs pools 46 Chapter 3 Operation of Performance Optimization Function GUI Figure 3 15 shows an example of the Busy Ratio Graph screen displayed when pools are selected Table 3 14 describes the areas on the Busy Ratio Graph screen Graph Display Area Graph Scale Setting Area Busy Ratio Graph Storage4900 Target Period 2006 11 22 00 00 2006 12 21 19 00 E aph Scale Busy Ratio m Al VA N bp RE AIC d Talal eh Mas hs Average Busy Ratio Maximum Busy Rati l Maximum Bus Pool0001 18 0002h 10002 2006 12 20 Bd oco Pool0003 2006 12 20 2 Legend Display Area Figure 3 15 Busy Ratio Graph Screen 47 Chapter 3 Operation of Performance Optimization Function GUI Table 3 14 Description of Busy Ratio Graph Screen Area Description Graph Scale setting area Selects a time range of Busy Ratio Graph on screen A range is specified by hours 3 6 12 24 days 1 to 31 or weeks 1 to 4 Setting is allowed within a period specified by the target period area on the Busy Ratio Graph dialog Upon activation of the Busy Ratio Graph screen all ranges specified for the target period are displayed on one screen
48. ation ON SCTeell oen erect eter etr eere iba qe 33 P partitioning function essere 14 performance analysis eese 1 performance optimization 1 performance optimization log file 77 performance tuning PerformanceMonitor eere 2 PerformanceOptimizer main 21 physical disk cecei rea oreet E rE eres 11 physical disk type of a Work Disk for Optimization 19 amp c procedures for setting analysis period procedures for setting sort of busy ratio R RANK ttn tta 23 RANK list 2 125 ReallocationControl eee 2 register LD movement schedule 60 replacement effect prediction 11 52 replacement effect prediction screen 55 56 replacement replacement plan dialog S Safety ZOIG d cene yr E o nr ato ERES setting analysis period setting folder to store data 39 40 setting sort of busy ratio sseseeeen 37 setting Work Disks for Optimization 18 showing the busy ratio graph sort of busy source logical disk
49. ation WK are allocated to different partitions SS s o ooo ooo artition A artition B The partition user whose user role is an operator or higher who has the management authorization of Partition A and Partition B can execute all operations In the following cases replacement cannot be executed between a source logical disk and a Work Disk for Optimization that belongs to different partitions e Partition allocation of the pool to which the source logical disk or the Work Disk for Optimization belongs is Exclusive The source logical disk and the Work Disk for Optimization belong to different nodes 15 Chapter 1 Overview of Performance Optimization Function If the partitioning function is available and replacement is executed between a source logical disk and a Work Disk for Optimization that belong to different nodes the logical disks use the cache segment allocated to the same partition of each destination node after replacement Example When LD that will be a source logical disk belongs to Partition A to which cache segment_1 of node000 is allocated and the destination Work Disk for Optimization WK belongs to Partition A to which cache segment_2 of node001 is allocated After replacement the source LD uses cache segmane_2 of the destination node node001 and the destination Work Disk for Optimization WK uses cache segment 1 of the node000
50. ation is placed is highly loaded performance will not be improved after movement Before placing a Work Disk for Optimization in a RANK or pool check the load state of the RANK or pool e RAID type A logical disk can be moved even if the RAID type is different between the moved material logical disk and the destination Work Disk for optimization Since each RAID type however has different characteristics you need to select the RAID type that is appropriate for operations when placing a Work Disk for Optimization For details on each RAID type refer to the Configuration Setting Tool User s Manual GUI e Physical disk type A logical disk can be moved even if the types of physical disks that make up the pool including the moved material logical disk and the destination Work Disk for Optimization are different Generally the FC disk drive or the SAS disk drive is used for mission critical tasks that require high performance and nonstop operation The SATA disk drive is used for backup and an archive that require 19 Chapter 2 Installation of Performance Optimization Function low cost and large capacity Performance of FC and SAS disk drives said to be higher than that of the SATA disk drive SSDs Solid State Drives which are faster and offer better performance than FC and SAS disk drives are also supported Use the type of disk drive suitable for your purpose e Rotation speed of a physical disk A logical disk can b
51. butions 6 Trademarks This License does not grant permission to use the trade names trademarks service marks or product names of the Licensor except as required for reasonable and customary use in describing the origin of the Work and reproducing the content of the NOTICE file 7 Disclaimer of Warranty Unless required by applicable law or agreed to in writing Licensor provides the Work and each Contributor provides its Contributions on an AS IS BASIS WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND either express or implied including without limitation any warranties or conditions of TITLE NON INFRINGEMENT MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE You are solely responsible for determining the appropriateness of using or redistributing the Work and assume any risks associated with Your exercise of permissions under this License 8 Limitation of Liability In no event and under no legal theory whether in tort including negligence contract or otherwise unless required by applicable law such as deliberate and grossly negligent acts or agreed to in writing shall any Contributor be liable to You for damages including any direct indirect special 82 Appendix Licenses incidental or consequential damages of any character arising as a result of this License or out of the use or inability to use the Work including but not limited to damages for loss of goodwill work stoppage computer failure o
52. ct Prediction graph dialog Display the Replacement Effect Prediction dialog with one of the following procedures Popup menu Select a work disk on Work Disk for Optimization Display Area and display a popup menu by right clicking Then select Replacement Effect Prediction on the popup menu Menu Select a work disk on Work Disk for Optimization Display Area and select Operation gt Replacement Effect Prediction Tool button Select a work disk on Work Disk for Optimization Display Area and select Replacement Effect Prediction on the toolbar Replacement Plan dialog Click the Replacement Effect Prediction button on the Replacement plan dialog Refer to 3 2 5 Replacement Plan for details on the Replacement Plan dialog Figure 3 17 shows an example of displayed the Graph Indicating Replacement Effect Prediction dialog and Table 3 16 provides descriptions of the areas in the dialog 54 Chapter 3 Operation of Performance Optimization Function GUI Graph Indicating Replacement Effect Prediction Storage4900 Source Pool 0001h 10001 Source LD 050eh WN ONLINE work 050e Destination Pool 0002h 10002 Target Period ar a Destination LD 10325h WN ONLINE work 0325 Target Period art Time 2006 Year 11 Mon 25 Day 2006 Year 12 Mon 24 Day Show Graph Cancel Help Figure 3 17 Graph Indicating Replacement Effect Prediction Dialog Table
53. d high Example 3 Specify a volume name to move data between the logical disk 000ah and the Work Disk for Optimization 0010h Select the default volume movement speed auto SnapSAN Managerprfctl start ldmv arrayname storagel ldname NX VOLOO00a wkldname NX WK0010 Example 4 Specify a volume name to move data between the logical disk 000ah and the Work Disk for Optimization 0010h The volume name is specified with the volume format being omitted Select the default volume movement speed auto 75 Chapter 4 Operation of Performance Optimization Function CLI gt gt E gt gt gt E gt E gt gt E gt E gt EL E Eb S S S Ih gt E _ _ _ E S SE _ H H h Yh __LLLL___ _ _ _ __________ SnapSAN Managerprfctl start ldmv arrayname storagel ldname VOL000a wkldname WK0010 Example 5 Specify a volume name to move data between the logical disk 000ah and the Work Disk for Optimization 0010h which are both virtual capacity logical disks The volume name is specified with the volume format being omitted Select the default volume movement speed auto and cancel the set LD capacity threshold and LD capacity quota at movement SnapSAN Managerprfctl start ldmv arrayname storagel ldname VOL000a wkldname WK0010 capattr reset 2 Confirmation of movement The start function of the SnapSAN Managerprfctl command starts moving a logical di
54. depending on the disk array configuration change and T O situation etc Therefore reserve a disk capacity large enough for the calculated capacity 1 AutoTier log file The disk capacity required when the AutoTier log is accumulated for 2 months can be calculated by using the following formula Required disk capacity bytes 80 80 the number of RANKs pools x 28 the number of LDs x 4 x 89280 logging interval min 2 Calculation example of AutoTier log file The capacity for the AutoTier log file is calculated by assuming that the number of pools is 256 the number of logical disks is 4096 and the logging interval is 5 minutes for the target disk array Required disk capacity bytes 80 80 256 x 28 4096 x 4 x 89280 5 421973072 bytes approx 402 5 MB 3 Index file for the AutoTier log file An index file file name OPTDFASTF for the performance optimizing log file is also created in the same directory as the performance optimizing log file The disk capacity required for the index file of the AutoTier log file can be calculated by using the following formula Required disk capacity bytes 80 disk array x 644 the number of RANKs pools in all disk arrays x 20 77 Appendix A Estimating Size of Files for AutoTier Function 4 Calculation example of the index file for the AutoTier log file The capacity of the index file for the AutoTier log file is calculated by assuming that number o
55. e Stop Indicates that the SnapSAN Manager server is stopping monitoring the state Logging Status Accumulate Indicates that Busy Ratio information is being accumulated Stop Indicates that the accumulation of Busy Ratio information is stopping Logging Start Time Displays the time when accumulation of Busy Ratio information started Logging End Time Displays the time of latest accumulation of Busy Ratio information 24 Chapter 3 Operation of Performance Optimization Function GUI ii RANK list Figure 3 4 shows an example of display of the RANK list Table 3 3 provides descriptions of each display item Number Busy Completion Time RAID Status PD Type Un carrying Un carrying Un carrying Un carrying Un carrying Figure 3 4 Example of Display of RANK List Table 3 3 Display Items of RANK List Display Item Description Number Displays the icons and numbers of RANKs Display format of the icon is the same as that of the Configuration Display Area Busy Ratio Displays the Busy Ratio of RANKs For the RANK that does not have valid Busy Ratio information a string of asterisks is displayed Note When a logical disk in the RANK is moved Busy Ratio information which has been accumulated is no longer related with Busy Ratio information which is to be accumulated after the movement Therefore immediately after a logical disk has been moved there is no valid Busy Ra
56. e except the BV Note 1 A source logical disk is a System Volume A source logical disk to which data protection setting has already been set A source logical disk and a destination logical disk belong to different partitions and the partition allocation of the pool in which the source logical disk or the destination logical disk is bound is Exclusive A source logical disk and a destination logical disk belong to different partitions and the destination logical disk is bound in a different node from that of the source logical disk A logical disk virtual capacity logical disk is being released Note 2 Note 1 BV base volume original volume which is the copy source Note 2 For details about how to release the capacity refer to the Thin Provisioning User s Manual If the partitioning function is available when replacement is executed between a source logical disk and a Work Disk for Optimization that belong to different nodes the cache segment to which each logical disk is assigned is replaced 67 Chapter 3 Operation of Performance Optimization Function GUI When the thin provisioning function is available the capacity of the pool including the destination logical disk might be insufficient if allocation to the destination logical disk occurs while the logical disk is being moved As such data may not be moved between logical disks when the destination logical disk is a virtual capacity logical disk
57. e moved even if the rotation speed is different between the moved material logical disk and physical disks that make up the pool including the destination Work Disk for Optimization Performance of a physical disk with high rotation speed is said to be higher than that of a physical disk with low rotation speed e Number of physical disks making up a pool to which logical disks belong If a pool is made up of a lot of physical disks of the same RAID type data to be saved is distributed across physical disks and parallel processing is allowed As a result high speed access performance can be achieved If a pool is made up of physical disks of different RAID types performance cannot always be increased in proportion to the number of physical disks because characteristic of RAID Performing placement of Work Disks for Optimization when introducing a disk array subsystem is one of the operation modes If Work Disks for Optimization are allocated beforehand performance can be tuned without physical disks being added However since it is difficult to predict occurrence of a bottleneck in performance placement of Work Disks for Optimization needs to be designed after due consideration Note the following when placing Work Disks for Optimization when introducing a disk array subsystem e Utilization ratio of a disk array subsystem Work Disks for Optimization cannot be used for business Be careful that the utilization ratio of the disk array subsystem
58. ement Start LD Movement ET E oe Close Help Figure 3 16 Replacement Plan Dialog 51 Chapter 3 Operation of Performance Optimization Function GUI Table 3 15 Description of Replacement Plan Dialog Area Description Disk Array Subsystem Nicknames of selected disk arrays are displayed RANK pool numbers of the bottleneck RANKs pools are displayed The High Load RANK Pool applicable RANKs pools to be displayed in the replacement plan display area can be changed by selecting RANKs pools on a pull down menu RANK pool numbers are listed in order of heavy load Replacement plan display area The candidate movement destination logical disks are listed in the order of effectiveness in I O distribution The following are items to be displayed Recommendation Rating Ranking of effectiveness in I O distribution after logical disk movement is displayed Source LD No Icon and number of source LD are displayed Icons displayed are the same as those in Configuration Display Area Source LD Name Source logical disk names are displayed Source Partition Name When the partitioning function is installed The name of the partition to which the source logical disk belongs is displayed Destination RANK For other than disk arrays with pool Icons and numbers of destination RANKs are displayed RANK icons displayed are the same as those in Configuration Display Area and Detailed Display Area Destina
59. ent LD O050eh NX ONLINE DISK 1126 03 Movement Pool OOO00h gt 0005h Speed Area Movement Speed C high Copy at the optimal speed the maxinum speed LD capacity LD capacity threshold LD capaci cp threshold When moving amaeT g virtual capacity logical disk of Thin Provisioning a specifies LD capacity Stment of the set LD capacity threshold LD capacity quota quota Area Eeep Setting C Reset Setting Keep Setting It specifies the LD capacity threshold LD capacity quota of the source logical disk in the destination loqical disk LD capacity threshold LD capacity quota are not specified b ination logical disk Start Schedule Start Schedule Area Scart lately tart at Specified Time Year Mon Day v Hour v Min start within 24 Hours time to continue re execution when start movement or cannot start movement Figure 3 24 Start LD Movement Dialog Table 3 19 Description of Start LD Movement Dialog Area Description Select Moving speed between auto and high The following describes the two speeds auto The disk array automatically adjusts movement speeds in accordance with the load state minimizing the influence of moving operation to the business system A recommended moving speed is used and this is selected by Movement Speed area default high Data is copied in a maximum data transfer rate Although this setting com
60. erformance Optimization Function GUI Example 1 Example of correct transfer Busy Ratio of the source RANK pool 9096 Busy Ratio of the moved material logical disk 30 Busy Ratio of the destination RANK pool 25 Busy Ratio after the moved material logical disk Busy Ratio of the source RANK pool Almost equally averaged correct transfer Busy Ratio of the destination RANK pool Example 2 Example of incorrect transfer Busy Ratio of the source RANK pool 9096 Busy Ratio of the moved materiallogical disk 4596 Busy Ratio of the destination RANK pool 2596 Busy Ratio after the moved material logical disk es 2 The destination RANK have bottleneck incorrect transfer Busy Ratio of the source RANK pool Busy Ratio of the destination RANK pool When you double click a logical disk in the detailed information display area destination candidates are displayed in the Work Disk for Optimization Display Area Then based on the above mentioned points select a Moved Material Logical Disk and a destination Work Disk for Optimization If the RAID type of the source logical disk and the destination Work Disk for Optimization is different if the moved material logical disk is bound in the dynamic pool or if the RAID type is RAIDIO or RAID50 the Busy Ratio after movement cannot be expected In addition effect after movement depends on the RAID type of the pool of a Work Disk for Optimization the type of the ph
61. ess operations Chapter 1 Overview of Performance Optimization Function Application Server Disk Array Large number diversified accesses AutoTier Performance analysis tuning Cancellation of bottleneck Large number diversified accesses Dynamic execution of rearrangement without stopping business operations Figure 1 1 Concept of AutoTier 1 2 AutoTier and Related Product The AutoTier is for the following program products BaseProduct AccessControl Performance Monitor ReallocationControl 1 3 System Configuration For system configuration examples when using the performance optimization function refer to Chapter 3 System Configuration in the Manual Guide Chapter 1 Overview of Performance Optimization Function 1 4 Operation Example of Performance Optimization Function The following effects can be expected by installing the performance optimization function e Resolution of bottlenecks Bottlenecks can be resolved by moving business data from a high load physical disk pool or RANK to a low load physical disk For details refer to 1 4 1 Resolution of Bottlenecks e Performance improvement by replacing business data Performance can be improved by replacing business data from a low speed physical disk to a high speed physical disk For details refer to 1 4 2 Performance Improvement by Replacing of Business Data e Optimal placement of dat
62. f the target disk arrays is 3 and number of pools for each disk array is 256 Required disk capacity bytes 80 3 x 644 256 x 3 x 20 17 372 bytes approx 17 0 KB 78 Appendix Licenses Appendix Licenses B 1 Apache log4j License Apache License Version 2 0 January 2004 http www apache org licenses TERMS AND CONDITIONS FOR USE REPRODUCTION AND DISTRIBUTION 1 Definitions License shall mean the terms and conditions for use reproduction and distribution as defined by Sections 1 through 9 of this document Licensor shall mean the copyright owner or entity authorized by the copyright owner that is granting the License Legal Entity shall mean the union of the acting entity and all other entities that control are controlled by or are under common control with that entity For the purposes of this definition control means 1 the power direct or indirect to cause the direction or management of such entity whether by contract or otherwise or ii ownership of fifty percent 50 or more of the outstanding shares or iii beneficial ownership of such entity You or Your shall mean an individual or Legal Entity exercising permissions granted by this License Source form shall mean the preferred form for making modifications including but not limited to software source code documentation source and configuration files Object form shall mea
63. gt E E SSSSSSS_____L_ _A Operation flow Monitoring and analyzing the load state Activate the performance optimization function screen and analyze the load state based on the busy ratios displayed on the screen The Performance Monitoring User s Manual busy ratios are color coded according to the height of the ratios In Performance Analysis User s Manual addition since the information can be displayed in graphs the 3 2 Operation on Screen bottlenecks of concentrated I Os can be detected easily Use of the performance monitoring function and the performance analysis function together allows more effective monitoring and analysis Planning replacement After detecting a bottleneck replace the logical disk to distribute the 1 5 2 Replacement Plan loads and resolve the bottleneck Use of the replacement plan 3 2 Operation on Screen function can plan effective replacement easily Predicting replacement effect Effect of the planned replacement can be checked before practicing the replacement process You can verify the effect of replacement by 1 5 3 Replacement Effect Prediction comparing the busy ratios before and after replacement which are 3 2 Operation on Screen indicated in values and graphs After verifying sufficient effect of replacement proceed to the next step of performance tuning shown below Replacing 1 5 4 Performance Tuning
64. hedule 70 changing speed eere 69 completion of logical disk movement 67 configuration display area see 22 configuration of the disk array sss 22 D danget AD P 38 destination logical disk 48 52 63 64 65 detailed display area disk array layer inen cn neon IR REST disk array lita ie chere ene 24 disk performance 1 display order of columns 22 277 29 31 42 47 51 Download Selection dialog esses 43 downloading optimization log files that records Busy nennen ire nre dde ee 43 E environment Setting uois 17 estimating size of files for performance optimization PUNCHON Hber e HR RE 79 90 mstallatioti iui eise aii e de 17 installation of a disk array subsystem Ni ISM client aeree petet D RES 1 L LD Administration function eeeeeeeee LD movement speed modification command logical ere err eene e logical disk list tret rrt er rei logical disk movement command M ines movement destination logical disks movement progress information display area multi RANK type operating environment 17 operation example of performance optimization function EE 3 Oper
65. ical disk movement operation at a specified time Moving start time and time of continuing re execution can be specified Starting time can be specified as late as 1 month later When movement cannot be executed even after moving start time movement is retried within the time set for time of continuing re execution Specifying up to 24 hours is allowed for continuing retries Note that logical disks cannot be moved in the following cases For other than disk arrays with pool For disk arrays with pool To move a logical disk specify a movement speed in the Start LD Movement dialog To move a virtual capacity logical disk specify the settings for LD capacity threshold LD capacity quota in that dialog Next select Start Immediately of the Start Schedule area and then click the OK button Click the Yes button when the confirmation dialog appears to start moving the logical disks To specify a LD movement schedule of logical disks specify a movement speed for a logical disk or specify the LD capacity threshold and LD capacity quota settings for a virtual capacity logical disk Next select Start at Specified Time of the Start Schedule area and specify moving start time and time of continuing re execution Click the OK button displays the confirmation dialog Then click the Yes button to register the LD movement schedule The user role is monitor The number of transfers has exceeded the maximum number of transfer
66. imization Please note this point when you specify configuration of the disk array For other than disk arrays with pool A logical disk is multi RANK type A logical disk is set as a pair of Volume Cloning Remote Replication Note 1 A logical disk is a cache resident disk For disk arrays with pool A logical disk is set as a pair of Volume Cloning Remote Replication Note 1 A logical disk is a cache resident disk A logical disk is a snapshot related volume except the BV A logical disk is a System Volume A logical disk is a previously set data protection setting An LD capacity quota or logical disk for which LD capacity threshold is set in the case of virtual capacity logical disk Note 2 In addition the maximum number of work disks for optimization which can be set for each disk array is predetermined The maximum number of work disks for optimization depends on the specification of each disk array Therefore check the number when configuring the settings for the disk array Note 1 For details on Volume Cloning Remote Replication refer to the Data Replication User s Manual Function Guide and Data Replication User s Manual Installation and Operation Guide in accordance with your OS in use Note 2 For details on virtual capacity logical disk LD capacity quota and LD capacity threshold refers to Thin Provisioning User s Manual 18 Chapter 2 Installation of Performance Optimization
67. ing graph scale specify a range to be displayed on one screen hours 3 6 12 24 days 1 to 31 or weeks 1 to 4 and then click the Apply button If system configuration is changed within a target period including movement of logical disks the graph lines become discontinuous The average maximum Busy Ratios after a configuration change are calculated on the basis of the system configuration after the changes If configuration change is performed for two or more times the average maximum Busy Ratios are displayed on the basis of configuration after the latest change However the change occurs at the end of or after the target period 15 displayed for average maximum Busy Ratios 59 Chapter 3 Operation of Performance Optimization Function GUI 3 2 7 Start LD Movement If a RANK pool with Busy Ratio reaching a caution zone or a danger zone is detected the logical disks on the RANK pool must be moved to balance the I O density The tuning can be executed instantly or at a specified time and date by registering a schedule Explanation will be made below about the procedures for logical disk movement 1 From deciding logical disks to be moved to starting disk moving registering disk LD movement schedule i Selecting a RANK pool Select a RANK pool to be tuned in the Configuration Display Area or in the detailed information display area You can specify a RANK pool in which the Busy Ratio has not reached the critical
68. ion of Performance Optimization Function GUI Setting Sort of Busy 322 Setting Sort of Busy The signal color corresponding to the Busy Ratio is appended to the icon of a RANK pool and logical disk The color allows you to visually recognize the degree of the Busy Ratio so that the bottleneck can be detected easily Furthermore by specifying classes of Busy Ratios reference level values for executing replacement are specified Replacement plan is applicable to the RANKs pools and logical disks that reached the caution zone or danger zone For replacement plan refer to 3 2 5 Replacement Plan Explanation will be given below about Analysis Property dialog Sort of Busy Ratio tab screen and setting procedures 1 Displaying Analysis Property dialog Sort of Busy Ratio tab Select Setting Analysis Property menu on the main screen of the performance optimization function On the displayed Analysis Property dialog box select Sort of Busy Ratio tab that displays an area for specifying the sort of busy ratio Figure 3 10 shows an example display of Analysis Property dialog Sort of Busy Ratio tab Analysis Property Analysis Period Sort of Busy Ratio Folder to Store Data Signal Color Busy Ratio e 81 100 e EE 80 4 e 0 50 Red Since it is in a high load state tuning is required danger Yellow Although the busy ratio is not in the danger range caution user must caution about bus
69. isks will not require any setting changes or access methods to business systems High load physical disk bottleneck I O to LDx has been moved to the low load I O concentrates in logical disks LDy LDz physical disk thereby canceling the high load causing a high load state state Logical disk in which I O concentrates is replaced with a work Distribution of I O cancels the bottleneck Work disk Figure 1 6 Concept of Performance Tuning 12 Chapter 1 Overview of Performance Optimization Function Due to performance tuning effect and so on the performance optimization by the performance tuning function has limitation Logical disks cannot be moved in the cases described below When you perform the tuning operation or configuration setting of the disk array please note the following For other than disk arrays with pool A moved material logical disk is located in the same RANK as a Work Disk for Optimization A moved material logical disk and a Work Disk for Optimization are different in capacity A moved material logical disk is multi RANK type A logical disk is a cache resident disk For disk arrays with pool A moved material logical disk is located in the same pool as a Work Disk for Optimization A moved material logical disk and a Work Disk for Optimization are different in capacity A logical disk is a cache resident disk A logical disk is a snapshot related volume except the
70. l Indicates graph display time Display intervals by a label are as follows 1 hour period 20 minute interval 2 hour period 30 minute interval 3 hour period or longer Interval variable by value specified in Graph scale setting area Legend display area Displays the items listed below Number Indicates icon and number of RANK pool Pool Name For disk arrays with pool Indicates the pool name Average Busy Ratio Indicates an average Busy Ratio within the target period Note When the configuration of the relevant RANK pool is changed during the target period including the logical disk movement this ratio is calculated based on the information after the configuration is changed However if there is no data to be calculated during the target period a string of asterisks is displayed Maximum Busy Ratio 46 Indicates a maximum Busy Ratio within the target period Note When the configuration of the relevant RANK pool is changed during the target period including the logical disk movement this ratio is calculated based on the information after the configuration is changed However if there is no data to be calculated during the target period a string of asterisks is displayed 58 Chapter 3 Operation of Performance Optimization Function GUI Upon activation of Replacement Effect Prediction screen the graph displays all ranges specified for target periods on one screen For chang
71. lay Area or Detailed Display Area and select Operation Busy Ratio Graph Tool button Select disk array or RANK pool on the Configuration Display Area or Detailed Display Area and select Busy Ratio Graph on the toolbar 43 Chapter 3 Operation of Performance Optimization Function GUI Figure 3 12 shows example of displayed the Busy Ratio Graph dialog when selecting pool and Table 3 12 provides descriptions of the areas in the dialog LD Selection area when pool is selected on Configuration display area or Detailed Display Area or Pool Selection area when disk array is selected on Configuration display area or Detailed Display Area Busy Ratio Graph Storage4 900 Pool Selection Un carrying 10002 Un carrying PoolO0003 Un carrying PoolO006 Un carrying Pool0007 Un carrying v Target Period Show Graph Cancel Help Figure 3 12 Busy Ratio Graph Dialog Table 3 12 Descriptions of Busy Ratio Graph Dialog Area Description RANK Pool Selection area when disk Displays a list of RANKs pools included in selected disk array is selected on Configuration Display array For display items refer to Table 3 3 3 4 Display Area or Detailed Display Area Items of RANK Pool List Displays a list of LDs included in selected RANK pool For display items refer to Table 3 5 Display Items of Logical Disk List except Snapshot Type and Cache Resident
72. ment progress operation register movement schedule Movement progress operation and register movement schedule can be viewed on the state field of Movement Progress Information Display Area on the main screen of performance optimization function Figure 3 25 displays an example display of the moving progress information display area Movement Progress Information Disk Array Subsystem Source RANK Pool No Source Pool Name Source LD No Source LD Name Destination RANK Pool Destination Pool Name Destination LD No Destination LD Name Status Progress Ratio Speed of Movement Start Time End Time Storage4900 0002h Pool0002 0530h NX ONLINE_0 0025h Pool0025 0511h LX wk_ONLINE_0094 Scheduled auto 2006 12 Storage4900 0002h Pool0002 0531h NX ONLINE 0 0025h Pool0025 0512h LX wk_ONLINE_0095 Moving 0 auto 2006 12 10 Working Figure 3 25 Example of Movement Progress Information Display The display items can be selected among the choices displayed when selecting View Movement Progress menu on the main screen of performance optimization function The following lists the selectable items All of Movement Information Displays logical disks in current moving process and scheduled moving process Movement Under Processing Displays only logical disks that are currently being moved Scheduled Movement Displays only logical disks that are schedule to be mo
73. n Function GUI 3 2 Operation on Screen 3 2 1 Setting Analysis Period The Busy Ratios of RANKs pools and logical disks are displayed on the screen The displayed values are average values during the specified period This period is called an analysis period The time zone in which the disk array is used depends on the business system The following is the examples The time zone in which the disk array is used is limited to a specific time zone for a day The business peak comes on weekends which increase the load on the disk array The business peak comes at the end of the month which makes the load on the disk array highest When the use of the disk array is limited to a specific time zone or period or when the period during which it is expected that there will be a high load on the disk array an analysis period must be adjusted according to such a time zone or period This adjustment allows displaying appropriate Busy Ratios and appropriate analysis for the business system operations This section describes the dialog for specifying an analysis period and the specifying procedures 1 Displaying Analysis Property dialog Analysis Period tab Select Setting Analysis Property menu on the main screen of the performance optimization function On the displayed Analysis Property dialog box select Analysis Period tab that displays an area for specifying an analysis period A period within the time including past 1 month ca
74. n any form resulting from mechanical transformation or translation of a Source form including but not limited to compiled object code generated documentation and conversions to other media types 79 Appendix Licenses Work shall mean the work of authorship whether in Source or Object form made available under the License as indicated by a copyright notice that is included in or attached to the work an example is provided in the Appendix below Derivative Works shall mean any work whether in Source or Object form that is based on or derived from the Work and for which the editorial revisions annotations elaborations or other modifications represent as a whole an original work of authorship For the purposes of this License Derivative Works shall not include works that remain separable from or merely link or bind by name to the interfaces of the Work and Derivative Works thereof Contribution shall mean any work of authorship including the original version of the Work and any modifications or additions to that Work or Derivative Works thereof that is intentionally submitted to Licensor for inclusion in the Work by the copyright owner or by an individual or Legal Entity authorized to submit on behalf of the copyright owner For the purposes of this definition submitted means any form of electronic verbal or written communication sent to the Licensor or its representatives including b
75. n be specified for an analysis period The following shows the default values for an analysis period Initial values for the analysis period Period to Calculate Starting from one month before to the present Days of the Week to Calculate All days of the week Time Zone to Calculate 24 hours from 0 00 Figure 3 9 shows an example of displayed Analysis Property dialog Analysis Period tab and Table 3 9 provides descriptions of the areas in the dialog 35 Chapter 3 Operation of Performance Optimization Function GUI Analysis Property Penod to Calculate Analysis Period Sort of Busy Ratio Folder to Store Data Specification Area Period to Calculate C Absolute Tue M WedM Thu M Fi M Sat Iv 4 00 Hour 00 Min To 24 2 Hours Time Zone to Calculate Day of the Week to Specification Area Calculate Specification Area Figure 3 9 Example of Display of Analysis Property Dialog Analysis Period Tab Table 3 9 Descriptions of Areas in Analysis Property Dialog Analysis Period Tab Area Description Period to Calculate specification Specifies the analysis period by day unit Date and elapsed days can be used for area the specification e Absolute Date Specifies the start day and end day of the analysis period in the Year Month Day format e Period to Calculate Specifies the analysis period in the format of days ago to now Day of the Week to Calculate
76. nce optimization log file Busy Ratio information of an analysis period does not exist in performance optimization log file The moved material logical disk is bound in the dynamic pool or the RAID type of logical disk is RAID10 or RAIDSO A suggested replacement plan is invalid in the following cases A source logical disk on high load RANK pool has been moved Movement schedule has been registered for a source logical disk on high load RANK pool 53 Chapter 3 Operation of Performance Optimization Function GUI 3 2 6 Replacement Effect Prediction The performance optimization function is capable of estimating an effect of load distribution after logical disk movement By executing this function the changes of Busy Ratios for RANKs pools to which source and destination logical disks belong are displayed in graphs A volume that cannot be replaced is not displayed in a graph If you log into the system to which the partitioning function is installed as a partition user only the resources of the partitions the user can manage can be displayed in graphs This section describes the dialog for displaying an effect of replacement and the displaying procedures 1 Display Replacement Effect Prediction dialog For selecting the items for displaying graphs of replacement effect the Graph Indicating Replacement Effect Prediction dialog must be displayed Four procedures are provided for displaying the Displaying Replacement Effe
77. ng User s Manual Performance Analysis User s Manual function Preparing a Work Disk for Optimization As results of analysis of usage frequency if movement is needed bind a logical disk that will be a Work Disk for Optimization in the pool configured by low speed physical disks and add the attribute of 2 3 2 Placement of Work Disks for Optimization Configuration Setting Tool User s Manual GUD LD Administrator User s Manual the Work Disk for Optimization Replacing Execute replacement handling the prepared Work Disk for Optimization as the destination of movement 1 5 4 Performance Tuning 3 2 Operation on Screen 4 1 Logical Disk Movement Command Appendix A Command of Performance Optimization Function Chapter 1 Overview of Performance Optimization Function 1 4 4 Data Migration When Adding a Node For a disk array with node when a node in which business data is placed is highly loaded and business performance might be degraded In this case the load can be distributed between nodes by adding a node and moving business data to the added node If the performance optimization function is not installed you need to stop business to move data If the performance optimization function is installed you can move data without stopping business when adding a node In the example shown in Figure 1 5 node performance leveling is performed by replacing 1 000 bo
78. ng folders Overwrite it Folder to Store Data C Program Files NEC SISMClient T MP 4 i Cancel Change Folder Figure 3 14 Confirmation of Overwriting Dialog Clicking OK on the Confirmation of Overwriting dialog overwrites the existing data Clicking Change Folder button allows changing the folders to store data to be downloading destination For changing the folders to store data refer to 3 2 3 Setting Folder to Store Data When downloading is executed the performance optimization log files stored in the folder to store data of the SnapSAN Manager client are updated and the data older than one month old is deleted Upon attempting execution of download process if a performance optimization log file storing Busy Ratios does not exist on the SnapSAN Manager server the process results in an error without executing downloading Meanwhile upon attempting execution of Busy Ratio Graph without downloading performance optimization log file the process results in an error without showing the Busy Ratio Graph if no data exists in the folder to store data of the SnapSAN Manager client Clicking Cancel on the Downloading dialog during execution of download process interrupts the download process And closing the main screen of performance optimization function interrupts the download process too If a process is interrupted the performance optimization log files must be downloaded again Showing the Busy Ratio Gr
79. ng on the setting of the SnapSAN Manager client underlined Display in numerical order Source LD No Source LD Name Source Partition Name Destination RANK Destination Pool No Destination LD No Destination LD Name Destination Partition Name and Source RANK Busy are displayed in this order Display in alphabetical order Source LD Name Source LD No Source Partition Name Destination RANK Destination Pool No Destination LD Name Destination LD No Destination Partition Name and Source RANK Busy are displayed in this order On the Replacement Plan dialog select a line of a replacement plan on the Replacement plan display area and click Start LD Movement button or select Start LD Movement on right click popup menu This can start movement of the logical disks For starting moving of logical disks refer to 3 2 7 Start LD Movement On the Replacement Plan dialog select a line of a replacement plan on the Replacement plan display area and click Replacement Effect Prediction button or select Replacement Effect Prediction on right click popup menu This can estimate the effectiveness of replacement after logical disk movement For the replacement effectiveness of replacement after logical disk movement refer to 3 2 6 Replacement Effect Prediction Replacement plan is unavailable in the following cases Busy Ratio information is not stored in performa
80. nt can be estimated before logical disk movement This function displays the changes of Busy Ratios in source and destination logical disks or RANK pool in graph format An administrator is allowed to verify that I O will not concentrate after moving disks and tune the performances on the basis of the estimated effects 11 Chapter 1 Overview of Performance Optimization Function 1 5 4 Performance Tuning The AutoTier moves logical disks located in a high load physical disk in which I O concentrates to a low load RANK so as to distribute the concentration of I O thereby canceling the I O competition and removing the bottleneck In addition moving a logical disk whose usage frequency is low in a low priced physical disk with large capacity enables you to use resources in the entire storage effectively This is called performance tuning The performance tuning can be executed instantly or at a registered time Figure 1 6 shows the concept of performance tuning implement by the performance optimization function The work disks shown in the figure are logical disks dedicated to the use for the performance tuning the Work Disk for Optimization By moving a logical disk placement of the Moved Material Logical Disk and the Work Disk for Optimization is switched The logical disks are moved inside the disk array without affecting any business system As a result performance tuning is possible while business is in operation Transfer of logical d
81. o the insufficient capacity of the pool including the virtual capacity logical disk or the LD capacity quota excess restore it to the level where data consistency is ensured for example by restoring backup data For details refer to Thin Provisioning User s Manual 29 Chapter 3 Operation of Performance Optimization Function GUI 6 Work Disk for Optimization Display Area When you double click a Logical Disk listed in the detailed display area the list of Work Disks for Optimization which are the destination candidates is displayed in the Work Disk for Optimization Display Area Only Work Disks for Optimization which satisfy the following requirements are listed The capacity of the optimization logical disk is the same as that of the logical disk selected in the detailed display area The optimization logical disk is bound for a different RANK pool from the logical disk selected in the detailed display area Figure 3 7 shows an example of display of detailed information of the Work Disk for Optimization Table 3 6 provides descriptions of each display item The order in which the Number Type and LD Name columns are displayed differs depending on the setting of the SnapSAN Manager client underlined Display in numerical order Number Type LD Name Status are displayed in this order Display in alphabetical order Type LD Name Number Status are displayed in this order
82. og Table 3 13 Descriptions of Download Selection Dialog Radio Button Description Downloads optimization log file recording Show graph after downloading insufficient data Busy Ratios onto the SnapSAN Manager client Displays Busy Ratio Graph without Show graph using data already downloaded downloading optimization log file Selecting Show graph after downloading insufficient data and clicking OK button downloads the performance optimization log files accumulated on the SnapSAN Manager server onto the SnapSAN Manager client and the optimization log files stored in a folder to store data is updated into a latest file For the folder to store data refer to 3 2 3 Setting Folder to Store Data Selecting Show graph using data already downloaded and clicking OK button displays Busy Ratio Graphs without downloading performance optimization log files form the SnapSAN Manager server In this case Busy Ratio Graphs are displayed for a log accumulation period of the optimization log files that have already been downloaded If the optimization log files of the specified period have already been downloaded for showing the Busy Ratio Graph the Confirmation of Overwriting dialog is displayed Figure 3 14 shows the Confirmation of Overwriting dialog 45 Chapter 3 Operation of Performance Optimization Function GUI Confirmation of Overwriting The data of an analysis period already exists in the followi
83. ong with the latest release of the software Point your browser to http docs overlandstorage com snapsan Follow the appropriate link to download the latest software file or document For additional assistance search at http support overlandstorage com Overland Technical Support For help configuring and using your SnapSAN Manager Suite for Windows search for help at http support overlandstorage com kb You can email our technical support staff at techsupport overlandstorage com or get additional technical support information on the Contact Us web page http www overlandstorage com company contact us For a complete list of support times depending on the type of coverage visit our web site at http support overlandstorage com support overland_care html Conventions Convention Description amp Usage Boldface Words in a boldface font Example indicate items to select such as menu items or command buttons Ctrl Alt r This type of format details the keys you press simultaneously In this example hold down the Ctrl and Alt keys and press the r key NOTE A Note indicates neutral or positive information that emphasizes or supplements important points of the main text A note supplies information that may apply only in special cases for example memory limitations or details that apply to specific program versions IMPORTANT An Important note is a type of note that provides info
84. ool List Display Item Description Number Displays the icons and numbers of pools Display format of the icon is the same as that of the Configuration Display Area Pool Name Displays the name of pool Busy Ratio 9 Displays the Busy Ratio of pools For the pool that does not have valid Busy Ratio information a string of asterisks is displayed Note When a logical disk in the pool is moved Busy Ratio information which has been accumulated until the movement is no longer related with Busy Ratio information which is to be accumulated after the movement Therefore immediately after the logical disk movement there is no valid Busy Ratio information for the pool This state will be cancelled when Busy Ratio information is accumulated at the next interval Completion Time Displays the time when the logical disk movement in the relevant pool has been completed When logical disks are not moved Un carrying is displayed RAID Displays the RAID type of the pool Status Ready Indicates that the pool is in the normal state ow Indicates that an event reduce formatting etc occurred in the pool and attention is necessary Faut Indicates that a fault occurred in the pool When fault is displayed some logical disks in the pool cannot be moved PD Type Displays the type of physical disks configuring the pool The same information as the PD Type of the pool displayed in the state moni
85. or Optimization Status Displays the state of Work Disks for Optimization Detailed Information is the same as that of the logical disks Partition Name Displays the name of the partition where the Work Disk for Optimization belongs When the partitioning function is installed Node No Displays the number of the node to which the Work Disk for Optimization belongs For disk arrays with node 30 Chapter 3 Operation of Performance Optimization Function GUI Display Item Description RANK Displays the RANK numbers of Work Disks for Optimization For other than disk arrays with pool RANK Busy When a moved material logical disk selected in the Detailed Display Area is moved to the Work Disks for Optimization the estimated Busy Ratio of the RANKs for the Work Disks for Optimization is displayed Note Ifthe RAID type of the Work Disk for Optimization is different from that of the moved material logical disk or if the RANK type is other than RAID1 and RAIDS the Busy Ratio after the disk movement cannot be estimated therefore a string of asterisks is displayed For other than the disk arrays with pool Pool No Displays the pool numbers of Work Disks for Optimization For disk arrays with pool Pool Name Displays the pool names of Work Disks for Optimization For disk arrays with pool Pool Busy When a moved material logical disk selected in the Detailed Display Area is moved to the Work
86. or the source logical disk Source LD No Displays the number of the source logical disk Source LD Name Displays the volume type and nickname of the source logical disk Source Partition Name Displays the name of the partition to which the source logical disk belongs When the partitioning function is installed Destination Displays the RANK pool number for the destination work disk for optimization RANK Pool No Destination Pool Name Displays the pool name for the destination logical disk Destination LD No Displays the logical disk number for the destination Work Disk for Optimization Destination LD Name Displays the volume type and nickname of the destination Work Disk for Optimization Destination Partition Name Displays the name of the partition to which the destination logical disk belongs When the partitioning function is installed 32 Chapter 3 Operation of Performance Optimization Function GUI Display Item Description Status Displays the movement status Displayed contents are as follows Moving Indicates that a disk is being moved Complete Indicates that movement has been finished normally Discontinue Indicates that movement is being canceled Discontinuation Indicates that movement has canceled due to a cancellation request Scheduled Indicates that movement schedule has been registered Changing Schedule Indicates that registered
87. or which it was delivered It is understood that no right is conveyed to reproduce or have reproduced any item herein disclosed without express permission from Overland Storage Overland Storage provides this manual as is without warranty of any kind either expressed or implied including but not limited to the implied warranties of merchantability and fitness for a particular purpose Overland Storage may make improvements or changes in the product s or programs described in this manual at any time These changes will be incorporated in new editions of this publication Overland Storage assumes no responsibility for the accuracy completeness sufficiency or usefulness of this manual nor for any problem that might arise from the use of the information in this manual Preface This user guide explains how to install setup and use your new SnapSAN AutoTune for Windows software to analyze the causes of lowered responses in the disk array subsystem and improving its performances This guide assumes that you are familiar with computer hardware data storage and network administration terminology and tasks It also assumes you have basic knowledge of Internet SCSI GSCSD Serial attached SCSI SAS Serial ATA SATA Storage Area Network SAN and Redundant Array of Independent Disks RAID technology Product Documentation and Firmware Updates Overland Storage SnapSAN product documentation and additional literature are available online al
88. pletes moving process in a shorter time than auto it causes greater influences to the business system This setting is specified in a specific case such as a case where the system tuning takes precedence over business operations This area is enabled when the source and destination logical disks are both virtual capacity logical disks and specifies whether the destination logical disk takes over the LD capacity threshold and LD capacity quota Keep Setting The destination logical disk takes over the LD capacity threshold and LD LD capacity capacity quota specified to the source logical disk threshold LD capacity po T P g quota area Reset Setting The LD capacity threshold and LD capacity quota are not specified to the destination logical disk Re specify them as needed This area is not specifiable if a source or destination logical disk is not virtual capacity logical disk If the destination logical disk is a virtual capacity logical disk the LD capacity threshold and LD capacity quota are not 64 Chapter 3 Operation of Performance Optimization Function GUI Area Description specified when the logical disk has been moved Re specify them as needed Start Schedule area This area specifies whether to Start LD Movement immediately or at a specified time Start Immediately Starts logical disk movement operation immediately Start at Specified Time Starts log
89. provides descriptions of each display item Table 3 8 Display Items for Status Bar Display Item Description Operating state Displays the current operating state Displayed contents are as follows Information acquiring Indicates that disk array configuration information or Busy Ratio information is being collected from the SnapSAN Manager server Working a Indicates that the AutoTier client is operating Stop Indicates that the AutoTier client has stopped due to a disconnection with the SnapSAN Manager server or a cancellation instruction provided on the Information acquiring dialog screen When the client is connected to the SnapSAN Manager server the operation can be resumed by selecting Update to The Current Information from the menu Interval for updating logical disk transfer progress information Numerical values displayed next to the operating state are the interval for updating logical disk transfer progress information This interval is for updating logical disk transfer progress information shown on the screen The value is the same as the interval for checking transfer progress of a logical disk specified in the environment setting of the SnapSAN Manager server Numerical values in 33 Chapter 3 Operation of Performance Optimization Function GUI the range from 5 seconds to 30 seconds are displayed 34 Chapter 3 Operation of Performance Optimizatio
90. pup menu Select Disk Array on the Configuration Display Area or Detailed Display Area and display a popup menu by right clicking Select Replacement Plan on the popup menu Menu Select Disk Array on the Configuration Display Area or Detailed Display Area and select Operation Replacement Plan Tool button Select Disk Array on the Configuration Display Area or Detailed Display Area and select Replacement Plan on the toolbar 50 Chapter 3 Operation of Performance Optimization Function GUI the Replacement Plan dialog a list of replacement plans for source destination logical disks which can expect higher effects of I O distribution after moving Figure 3 16 shows an example of displayed Replacement Plan dialog and Table 3 15 provides descriptions of the areas in the dialog Replacement Plan Display Area Replacement Plan The resource that exists in the same node as the high load pool is targeted in the feplacement plan Disk Array Subsystem D8 10 1 High Load Pool 0002h zes l aeures Manel Source soue pesti mmea ation Partition Name z VSPARL ti 0628h D 0516h VSPARL 2t D62sh ON VSPARI t 062ah ON Bj 0516 WN ON VSPARL ti 062bh LON WSPARZ tk 062bh ON 0516 WN ON VSPARZ ti 062ch ON VSPARZ ti O62ch ON pl sieh WNION vsparz ti 062dh ON VSPARZ Bj 062dh 10 0516 WN ON vsPAR2 S D Replac
91. r 1 Overview of Performance Optimization Function Chapter 1 Overview of Performance Optimization Function The performance optimization function is capable of analyzing the causes of lowered responses in the disk array subsystem and improving its performances An administrator with use of the performance optimization function analyzes the performances of disk array under the control of SnapSAN Manager by centralized operations on a SnapSAN Manager client and tunes the performances as necessary 1 1 Performance Optimization Function As the volume of business data increases day by day the scale and capacity of disk array become larger Access patterns have also been diverted due to the use by multiple business systems To maintain quick response of the business system it is necessary to monitor the load state of disk arrays and detect a bottleneck and improve it This work however requires advanced technical knowledge and techniques of performance analysis and tuning operations Furthermore when it is necessary to tune the performance business operations may be stopped for a while causing inconvenience to business operations The AutoTier solves such problems Introduction of the AutoTier makes it possible to properly and easily conduct painstaking performance analysis and tuning operations A tuning operation can be done while business is in operation thereby maintaining optimal disk performance around the clock without stopping busin
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94. result by using Performance Analysis User s Manual the performance monitoring function and the performance analysis function Chapter 1 1 4 3 Overview of Performance Optimization Function Optimal Placement of Data Business data whose usage frequency is decreased does not need to be placed on a high speed physical disk mostly Replacing business data whose usage frequency is decreased from a high speed physical disk to a low priced and low speed physical disk with large capacity can make investment cost for the entire storage reasonable without stopping business In the example shown in Figure 1 4 replacing LDO1 bound on a high speed physical disk whose usage frequency is decreased with the Work Disk for Optimization LD02 bound in a low speed physical disk area implements optimal placement of data 7 Operation flow Optimal Decrease in Application Application Application Server Placement Server Server Usage Completed Frequency Y v bot Replacement 1002 of E 1000 Pool001 slate Pool000 Pool001 Low speed area High speed area f Low speed area High speed area Reference Analyzing usage frequency To analyze usage frequency of a logical disk check IOPS transfer rate and transition of busy ratios of the logical disk by using the performance monitoring function and the performance analysis Performance Monitori
95. rmation essential to the completion of a task or that can impact the product and its function CAUTION A Caution contains information that the user needs to know to avoid damaging or permanently deleting data or causing physical damage to the hardware or system WARNING A Warning contains information concerning personal safety Failure to follow directions in the warning could result in bodily harm or death Menu Flow Words in bold font with a greater than sign between them Indicator indicate the flow of actions to accomplish a task For example gt Setup gt Passwords gt User indicates that you should press the Setup button then the Passwords button and finally the User button to accomplish a task Information contained in this guide has been reviewed for accuracy but not for product warranty because of the various environments operating systems or settings involved Information and specifications may change without notice Table of Contents Chapter1 Overview of Performance Optimization Function cccccccccsscecssssececseseeecsesaeeeessaeeeeeeaas 1 1 1 Performance Optimization FUNCTION 1 1 2 AutoTier and Related Product ete 2 1 3 System Configuration cccccccsssssssseseeeeecessesseaeseceeecesseseaaesecesecusseseaseseeeeucescesaaaeseeeesceusenaaeeeeess 2 1 4 Operation Example
96. rmed for two or more times the average maximum Busy Ratios are displayed on the basis of configuration after the latest change However the change occurs at the end of or after the target period 1s displayed for average maximum Busy Ratios 49 Chapter 3 Operation of Performance Optimization Function GUI 3 2 5 Replacement Plan RERHHEHHEHHEHRHEHREEHHEHERERHEHHREEHERERHEHHREERHHHEEEEHREEHERHHEERHEHHEEEERHEEE This function detects High Load RANK pool and makes the most effective replacement plan A list of replacement plans expecting higher effects of I O distribution after moving is made for replacing source destination logical disks The replacement plan is applicable to the RANKs pools reaching danger zone and critical zone specified on the Analysis Property dialog Sort of Busy Ratio tab However a volume that cannot be replaced is excluded from the replacement plan For description of Sort of Busy Ratio tab refer to 3 2 2 Setting Sort of Busy Ratio If you log into the system to which the partitioning function is installed as a partition user a plan is applicable only to the resources of the partitions the user can manage This section describes Replacement Plan dialog that makes replacement plan and operating procedures 1 Displaying Replacement Plan dialog Three procedures are provided for displaying the Replacement Plan dialog Open a Replacement Plan dialog by one of the following three procedures Po
97. rt time must be changed or registered movement schedule must be canceled As described above interrupting disk movement changing movement speed and changing canceling movement schedule are unusual operations For such exceptional operations the screen allows interrupting disk movement changing movement speed and changing canceling movement schedule However pay extra attention in operations of interrupting disk movement changing movement speed and changing canceling movement schedule These operations are allowed for users of operator role or higher only The following describes the procedures for stopping movement changing movement speed and changing canceling movement schedule Canceling LD movement Select a logical disk to stop the movement Click the logical disk you want to stop its transfer from the Movement Progress Information Display Area ii Displaying the Stop LD Movement dialog Three types of procedures are available for displaying the Stop LD Movement dialog Use any one of them to display the Stop LD Movement dialog screen Popup menu Perform right clicking to display the popup menu and then click Stop LD Movement from the popup menu Menu Click Operation and then click Stop LD Movement from the menu Tool Bar button Click the Stop LD Movement button on the tool bar 70 Chapter 3 Operation of Performance Optimization Function GUI Figure 3 26 shows an example of Stop LD Mo
98. rtitions whose management authorization is given and can reference the provided information Table 1 1 User Roles monitor Allows only reference operator Allows all operations administrator Allows all operations When the partitioning function is installed the following performance optimization functions are provided to a storage group user and a partition user e Storage group user A storage user can reference all information on performance optimization If a user role is an operator or higher the storage user can execute all operations No restriction is imposed on the operational range e Partition user A partition user can reference information on the pools and logical disks allocated to the partition whose management authorization is given If a user role is an operator or higher the partition user can execute all operations The operational range is limited to the logical disks and Work Disk for Optimization allocated to the partitions whose management authorization is given Example 1 When source logical disk LDx and destination Work Disk for Optimization WK are allocated to the same partition 14 Chapter 1 Overview of Performance Optimization Function ooo oo Partition The partition user whose user role is an operator or higher of Partition A can execute all operations Example 2 When source logical disk LDy and destination Work Disk for Optimiz
99. s simultaneously available in a disk array Maximum number 8 A moved material logical disk is located in the same RANK as a Work Disk for Optimization A moved material logical disk and a Work Disk for Optimization are different in capacity A moved material logical disk is multi RANK type A specified source or destination logical disk is already in moving process Movement schedule has already been registered to a specified source or destination A source logical disk is a cache resident disk A disk array is not being monitored by the SnapSAN Manager A disk array pool and logical disk are in the fault state A source logical disk is multi RANK type A source logical disk is formatting 65 Chapter 3 Operation of Performance Optimization Function GUI The user role is monitor The number of transfers has exceeded the maximum number of transfers simultaneously available in a disk array Maximum number 8 A moved material logical disk is located in the same pool as a Work Disk for Optimization A moved material logical disk and a Work Disk for Optimization are different in capacity A specified source or destination logical disk is already in moving process Movement schedule has already been registered to a specified source or destination A source logical disk is a cache resident disk A disk array is not being monitored by the SnapSAN Manager A disk array pool and logical disk are in the fault
100. scheduled by using the command Use the SnapSAN Managerprfctl command to move logical disks For details on the SnapSAN Managerprfctl command syntax refer to the SnapSAN Manager Command Reference 1 Command specification Use the logical disk movement function start ldmv of the SnapSAN Managerprfctl command to move logical disks If a logical disk is to be moved by the command when a bottleneck is detected or preventive maintenance is performed check information necessary on the client screen of AutoTier beforehand Then specifying the information in the command options The following information needs to be specified in the SnapSAN Managerprfctl command e Disk Array Subsystem Name of the Disk Array Subsystem containing the Moved Material Logical Disk Specify the name in the arrayname option e Source LD Logical disk on the RANK pool that is a bottleneck in performance due to the concentration of I O operations The logical disk number or name should be specified Specify the logical disk number in the Idn option or the logical disk name in the ldname option e Work Disk for Optimization Destination Work Disk for Optimization The logical disk number or name should be specified Specify the logical disk number in the wkldn option or the logical disk name in the wkldname option LD movement speed Speed at which data is copied when a logical disk is moved The speed can be specified by selecting 74 Chapter
101. sk This command does not wait until moving of the logical disk is completed If having moved a logical disk by executing the command confirm the start and completion of moving by the following methods e Start of movement Make sure of the message for the SnapSAN Managerprfctl command and the AutoTier message that is output to the SnapSAN Manager operation log When the logical disk starts moving normally the following messages are output Message for the SnapSAN Managerprfctl command SnapSAN Managerprfctl 001 Message output to the SnapSAN Manager operation log SnapSAN Manager09002 e Completion of movement Make sure of the AutoTier message that is output to the SnapSAN Manager operation log Message output to the SnapSAN Manager operation log SnapSAN Manager09003 When the moving terminates the SnapSAN Manager09003 message is output whether it terminates normally or not Therefore you can confirm the completion of moving by this message 76 Chapter 4 Operation of Performance Optimization Function CLI _ _ 3 Notes e The SnapSAN Managerprfctl command is executable only on the server on which SnapSAN Manager is operating Do not execute the command on an Application Server or while SnapSAN Manager is in stopped state e The SnapSAN Managerprfctl command is available with a client PC only when Telnet is connected It is not available with Terminal Service
102. t Pool000 Pool001 Low speed area High speed area Figure 1 3 Performance Improvement by Replacement of Business Data Chapter 1 Overview of Performance Optimization Function _ _ _ _ _ _ a ________ E_E______________ _ _ Operation flow Monitoring and analyzing the load status Performance Monitoring User s Manual Use the performance monitoring function and the performance i Performance Analysis User s Manual analysis function to monitor and analyze performance of the source logical disk Preparing a Work Disk for Optimization 2 2 Placement of Work Disks for As results of monitoring and analysis of the load status if movement Optimization is needed bind a logical disk that will be a Work Disk for Configuration Setting Tool User s Manual Optimization in the pool configured by high speed physical disks GUD and add the attribute of the Work Disk for Optimization LD Administrator User s Manual Replacing 1 5 4 Performance Tuning 3 2 Operation on Screen Execute replacement handling the prepared Work Disk for 4 1 Logical Disk Movement Command Optimization as the destination of movement Appendix A Command of Performance Optimization Function Verifying logical disk performance after replacement Performance Monitoring User s Manual Verify that the replacement produces the expected
103. talled For installation and uninstallation refer to the installation guide 2 1 3 Environment Setting The operating environment of the performance optimization function is the same as that of SnapSAN Manager For the operating environment setting refer to the installation guide 2 2 Client Installation 2 2 1 Operating Environment The operating environment of the performance optimization function is the same as that of SnapSAN Manager For the operating environment setting refer to the installation guide 2 2 2 Installation The performance optimization function is simultaneously installed when the SnapSAN Manager client is installed For installation and uninstallation refer to the installation guide 17 Chapter 2 Installation of Performance Optimization Function 2 3 Installation of Work Disks for Optimization When a logical disk is moved another logical disk which is hidden from all business systems and no access is ensured is required This logical disk is called a Work Disk for Optimization 2 3 1 Setting Work Disks for Optimization You can set Work Disks for Optimization by using the LD Administrator function of the SnapSAN Manager For the setting method refer to the LD Administrator User s Manual Due to the performance optimization function s limitation of logical disk movement and the nature of the Work Disk for Optimization logical disks listed below cannot be specified as Work Disks for Opt
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105. tio information for the RANK This state will be cancelled when Busy Ratio information is accumulated at the next interval Completion Time Displays the time when the transfer of the last logical disk in the RANK has been completed When logical disks are not moved Un carrying is displayed RAID Displays the RAID type of the RANK Status Ready Indicates that the RANK is in the normal state Attn Indicates that an event reduce formatting etc occurred in the RANK and attention is necessary Faut Indicates that a fault occurred in the RANK When fault is displayed logical disks in the RANK cannot be moved PD Type Displays the type of physical disks configuring RANK The same information as the PD Type displayed in the state monitoring screen of the SnapSAN Manager is displayed 25 Chapter 3 Operation of Performance Optimization Function GUI iii Pool list Figure 3 5 shows an example of display of the pool list Table 3 4 provides descriptions of each display item Number PoolName Busy Completion Time EE EE PD Type Partition Allocated Node No 0001 Pool0001 Un carrying Ready FC Exclusive 00h f0002h 0002 55 Un carrying 1 Ready FC Exclusive 00h f0003h 0003 30 Un carrying 1 Ready FC Shared ooh 004 0004 0 Un carrying 1 Ready FC Shared ooh Figure 3 5 Example of Display of Pool List Table 3 4 Display Items of P
106. tion Pool No For disk arrays with pool Icons and numbers of destination pools are displayed Pool icons displayed are the same as those in Configuration Display Area and Detailed Display Area Destination Pool Name For disk arrays with pool Destination pool name is displayed Destination LD No Icons and numbers of destination logical disks are displayed Icons displayed are the same as those in Work Disk for Optimization Display Area Destination LD Name The volume type and nickname of the destination logical disk are displayed Destination Partition Name When the partitioning function is installed The name of the partition to which the source logical disk belongs is displayed Source RANK BUSY For other than disk arrays with pool Expected change of Busy Ratio of a source RANK is displayed Destination RANK Busy For other than disk arrays with pool Expected change of Busy Ratio of a destination RANK is displayed Source Pool Busy For disk arrays with pool Current Busy Ratio and expected Busy Ratio of a source pool after the transfer are displayed Destination Pool Busy For disk arrays with pool Current Busy Ratio and expected Busy Ratio of a destination pool after the transfer are displayed 52 Chapter 3 Operation of Performance Optimization Function GUI The order in which the Source LD No Source LD Name Destination LD No and Destination LD Name columns are displayed differs dependi
107. tion and or other materials provided with the distribution 3 All advertising materials mentioning features or use of this software must display the following acknowledgment This product includes software developed by the OpenSSL Project ii for use in the OpenSSL Toolkit http www openssl org 4 The names OpenSSL Toolkit and OpenSSL Project must not be used to d endorse or promote products derived from this software without prior written permission For written permission please contact 86 Appendix Licenses openssl core Q openssl org 5 Products derived from this software may not be called OpenSSL nor may OpenSSL appear in their names without prior written permission of the OpenSSL Project 6 Redistributions of any form whatsoever must retain the following acknowledgment This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit http www openssl org THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT AS IS AND ANY EXPRESSED OR IMPLIED WARRANTIES INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED IN NO EVENT SHALL THE OpenSSL PROJECT OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT INDIRECT INCIDENTAL SPECIAL EXEMPLARY OR CONSEQUENTIAL DAMAGES INCLUDING BUT NOT LIMITED TO PROCUREMENT OF SUBST
108. toring screen of the SnapSAN Manager is displayed Partition Allocated Displays the allocation state of the pool The same information as the partition allocation displayed in the state monitoring screen of the SnapSAN Manager is displayed When the partitioning function is installed Node No Displays the number of the node to which the pool belongs For disk arrays with node If a failure occurs in the virtual capacity pool due to fault over capacity the capacity of some virtual capacity logical disks belonging to the failed pool becomes insufficient writing fails In such a case restore the virtual capacity pool and then the virtual capacity logical disks 26 Chapter 3 Operation of Performance Optimization Function GUI 27 Chapter 3 Operation of Performance Optimization Function GUI iv Logical disk list Figure 3 6 shows an example of display of the logical disk list Table 3 5 provides descriptions of each display item The order in which the Number Type and LD Name columns are displayed differs depending on the setting of the SnapSAN Manager client underlined Display in numerical order Number Type LD Name Status are displayed in this order Display in alphabetical order Type LD Name Number Status are displayed in this order Number Type LD Status Busy Ratio RAID Capacity GB Partition Name NodeNo _ Pool No
109. und on the node node000 that is highly loaded with the Work Disk for Optimization LDO1 bound on the added node node001 Application Application Server Node Server Performance Leveling x Replacement of Logical Disk Pool00 Pool000 Pool001 Node000 Node001 Figure 1 5 Data Migration When Adding a Node Chapter 1 Operation flow Overview of Performance Optimization Function _ _ i Reference Monitoring and analyzing the load state of a node Monitor and analyze the load status of a node by using the performance monitoring function and the performance analysis function and check whether a bottleneck exists on node resources If a bottleneck is found analyze business on the node and determine Performance Monitoring User s Manual Performance Analysis User s Manual the business to be moved Adding a node Add a node Y Binding a pool to the added node Bind a pool in which a Work Disk for Optimization is placed to the Configuration Setting Tool User s Manual GUD added node Preparing a Work Disk for Optimization Bind a logical disk that will be a Work Disk for Optimization in the bound pool and add the attribute of the Work Disk for 2 3 2 Placement of Work Disks for
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111. ved The Movement Progress Information is updated according to the interval time specified in the environment definition of the SnapSAN Manager For the check interval refer to Chapter 2 Installation of Performance Optimization Function After completion of logical disk movement the relation between the logical disk and the RANK pool changes In the case of virtual capacity logical disk the LD capacity threshold and LD capacity quota settings may change This configuration change is detected by the SnapSAN Manager simultaneously with the completion of the transfer and is reflected on the state monitoring screen of the SnapSAN Manager as well as on the performance optimization screen 69 Chapter 3 Operation of Performance Optimization Function GUI 3 Exceptional Operations After the transfer of a logical disk has started or the movement schedule has registered there is a possibility of canceling the movement changing the speed and changing canceling the movement schedule for some reason Canceling the movement A wrong logical disk has been moved Changing the speed The transfer speed will be changed to high because the disk has to be moved as soon as possible The speed setting will be changed to auto because the business system is greatly affected by the maximum speed Changing canceling movement schedule Due to circumstances that do not allow executing a move at a scheduled time movement sta
112. vement dialog When you want to cancel transfer click the OK button on the Stop LD Movement dialog screen Stop LD Movement Movement of the following logical disk is stopped Disk Array Subsystem Storage4900 Logical Disk 0531h NX ONLINE DISK 0329 Close 1 Figure 3 26 Stop LD Movement Dialog iii Cancellation When you click the OK button on the Stop LD Movement dialog screen the confirmation dialog screen appears When you click Yes on this screen the transfer is cancelled If you click No the transfer is not cancelled Changing speed i Select the logical disk of which transfer speed you want to change Click the logical disk of which transfer speed you want to change in the Movement Progress Information Display Area ii Displaying the Change LD Movement Speed dialog Three types of procedures are available for displaying the Change LD Movement Speed dialog screen Use any one of them to display the Change LD Movement Speed dialog screen Popup menu Perform right clicking to display the popup menu and then click Change LD Movement Speed from the popup menu Menu Click Operation and then click Change LD Movement Speed from the menu Tool Bar button Click the Change LD Movement Speed button on the tool bar 71 Chapter 3 Operation of Performance Optimization Function GUI Figure 3 27 shows an example of Change LD Movement Speed dialog Change LD Movement Speed
113. which the LD No and LD Name columns are displayed differs depending on the SnapSAN Manager client setting underlined Display in numerical order Source RANK Pool No Source Pool Name Source LD No Source LD Name Source Partition Name Destination RANK Pool No Destination Pool Name Destination LD No Destination LD Name Destination Partition Name and Status are displayed in this order Display in alphabetical order Source RANK Pool No Source Pool Name Source LD Name Source LD No Source Partition Name Destination RANK Pool No Destination Pool Name Destination LD Name Destination LD No Destination Partition Name and Status are displayed in this order Movement Progress Information Disk Array Subsystem Source RANK Pool No Source Pool Name Source LD No Source LD Name Source Partition Destination RANK Pool No Destination Pool Name Destinatiq 06 1071 00095 Paola 0519 NXOMUMED SARI 028 Pools 0512h lt gt Figure 3 8 Example of Display of Movement Progress Information Table 3 7 Detailed Information Display Items for Movement Progress Information Display Item Description Disk Array Subsystem Displays the disk array name for the moved material logical disk Source RANK Pool Displays the RANK pool number for the source logical disk No Source Pool Name Displays the pool number f
114. wnloading destination For changing the folder to store data refer to 3 2 3 Setting Folder to Store Data When downloading is executed the performance optimization log files stored in the folder to store data of the SnapSAN Manager client are updated and the data older than one month old is deleted Upon attempting execution of download process if a performance optimization log file storing Busy Ratios does not exist on the SnapSAN Manager server the process results in an error without executing downloading Meanwhile upon attempting execution of Replacement Effect Prediction without downloading performance optimization log file the process results in an error without Replacement Effect Prediction if no data exists in the folder to store data of the SnapSAN Manager client 56 Chapter 3 Operation of Performance Optimization Function GUI Clicking Cancel on the Downloading dialog during execution of download process interrupts the download process And closing the main screen of performance optimization function interrupts the download process If a process is interrupted the performance optimization log files must be downloaded again 4 Display Replacement Effect Prediction Clicking OK button on the Download Selection dialog displays the Replacement Effect Prediction screen The Replacement Effect Prediction screen displays the graphs indicating changes of Busy Ratios for specified source and destination RANKs pools Figure 3
115. y ratio If the busy ratio is in this range replacement plan will be made by replacement planning function Blue Tuning is not required safety Help Figure 3 10 Analysis Property Dialog Sort of Busy Ratio Tab The Busy Ratio range with the yellow signal color has spin buttons Use these spin buttons to set the three stages of the Busy Ratio As shown in Table 3 10 three signal colors are provided red yellow and blue 39 Chapter 3 Operation of Performance Optimization Function GUI Table 3 10 Description of Signal Colors Signal Color Meaning Description Red Danger zone The Busy Ratio has reached the Caution zone Tuning is necessary The RANKs pools reaching danger zone are applicable to Replacement Plan The default value ranges from 81 to 100 Yellow Caution zone The Busy Ratio has not reached the danger zone yet but attention is required Carefully continue the monitoring The RANKs pools reaching caution zone are applicable to Replacement Plan The default value ranges from 51 to 80 Blue Safety zone The Busy Ratio is normal No tuning is required The default value ranges from 0 to 50 2 Procedures for setting Sort of Busy Ratio This section describes the procedures for specifying the Sort of Busy Ratio on the Analysis Property dialog Sort of Busy Ratio tab The Sort of Busy Ratio can be saved by selecting File Save Settings
116. ysical disk configuring a pool the rotation speed and the like Therefore if you select a destination Work Disk for Optimization it is necessary to consider configuration in which the Work Disk for Optimization is placed in advance For placement of a Work Disk for Optimization refer to 2 3 2 Placement of Work Disks for Optimization The logical disks displayed in gray cannot be selected Gray display indicates that the logical disk movement is being executed that a movement schedule has been registered that the logical disk is a cache resident disk that the state of the logical disk is attn formatting that the state of the logical disk is fault that the logical disk is multi RANK type other than disk arrays with pool that it is a snapshot attribute and a disk other than the BV that the logical disk is a System Volume or that the data protection setting has already been set to the logical disk Also a reassignment plan prepared by the performance optimization function can be selected for moved material logical disk and work disk for optimization For details refer to 3 2 5 Replacement Plan 61 Chapter 3 Operation of Performance Optimization Function GUI EE gt gt gt gt gt gt gt gt E _ gt gt gt gt gt gt gt gt i i _ Type LD Name Status Busy Ratio RAID Capacity GB Pool No Pool Name PD Type Snapshot Type Cache
117. ysis period Busy Ratio calculation period 4 Configuration Display Area Configuration of the disk array that uses the AutoTier is separated into the disk array layer and the RANK pool layer and displayed in a tree view form Figure 3 2 shows an example of the display 22 Chapter 3 Operation of Performance Optimization Function GUI At the start of the screen or when you select Update to The Current Information from the menu only a disk array layer which is the initial state of the screen is displayed In Figure 3 2 the number 1 indicates a disk array layer and ii indicates a RANK pool layer Table 3 1 provides descriptions of each layer Table 3 1 Disk Array Layer and RANK Pool Layer Layer Description Disk Array layer Displays icons and the disk array name which correspond to respective disk array models An icon for the disk array which is not monitored by the SnapSAN Manager server is displayed in gray RANK Pool layer Displays the number and icon for the RANKs pools bound in the disk array Signal colors indicating the degree of the Busy Ratio are appended to the icon The signal colors can be changed on the Analysis Property dialog Sort of Busy Ratio tab Refer to 3 2 2 Setting Sort of Busy Ratio for Analysis Property dialog Sort of Busy Ratio tab e When the RANK pool is in the Ready mode PL Busy Ratio High tio RANK PL Busy Ratio
118. zone or attention zone yet as a tuning target It is possible to perform tuning for precautions or perform a tuning operation when short term I O concentration has been detected by the performance monitoring function Number PoolName Busy Ratio Completion Time RAID Status PD Type 57 Un carrying tid o003h Pool0003 0 Un carrying Ready 000 h Poold004 0 Un carrying Rea FC RANK Pool to Be Tuned Figure 3 21 Selecting a RANK Pool to Be Tuned Figure 3 21 shows an example of selecting a RANK pool to be tuned in the detailed information display area Double clicking the target RANK pool will display logical disks bound for the RANK pool in the Detailed Display Area ii Selecting Moved Material Logical Disks Selecting Work Disk for Optimization Among logical disks bound for the RANK pool to be tuned select a Moved Material Logical Disk It is not always right to move a logical disk which has the highest Busy Ratio Points to select a Moved Material Logical Disk are as follows Points to consider the moved material logical disks After logical disks have been moved the Busy Ratio of the destination RANK pool the RANK pool for which Work Disks for Optimization are bound should become nearly equal to that of the source RANK pool When there are multiple destination candidates Work Disks for Optimization select one that satisfies the above item and has the lowest Busy Ratio 60 Chapter 3 Operation of P

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