Dell PowerEdge M710HD Information Update
Contents
1. DOLL Information Update Power Infrastructure Sizing Properly sizing system power consumption benefits an efficient IT environment If the power supply power rating for a system is used to calculate the cumulative power for an overall deployment it provides a conservative assessment for many hardware configurations and can be less efficient and more costly In an effort to gain optimal performance and to avoid costly over provisioning you need to understand how to assess power consumption of the system to adequately provision the facility Power consumption is specific to the system configuration and to the workload expected of the hardware If a system is assessed under a peak workload for a specific deployment the assessment may result in a significantly different power consumption requirement than that of the power supply power rating On line capacity planning tools available from Dell may help to understand peak power consumption for a particular system configuration Systems characterized while using the power capping features enabled from Dell system management software provide additional predictability for peak power consumption Combined use of system and workload characterization with power capping can more accurately approximate the appropriate size of Power Distribution Units PDUs Uninterruptible Power Supplies UPSs and other power infrastructure distribution equipment Example If a server power supply is rated at 1000W an2. d the characterization results in 500W of power consumption for the configuration and workload the 500W power value can be used for infrastructure sizing Using system power capping at the 500W value also provides additional assurance that 500W can be used for sizing the infrastructure When deploying 20 of the same configuration in a rack the total load can be sized for 1OKW By contrast if the power supply rated value or 1000W were used the total load would be sized as 20KW The power supply rated approach requires additional power and cooling and results in an infrastructure that is utilized less than 50 percent Using PDUs with circuit protection devices such as circuit breakers or fuses ensures that regulatory and safety guidance is met for a deployment June 2009 Information in this document is subject to change without notice 2009 Dell Inc All rights reserved Reproduction of these materials in any manner whatsoever without the written permission of Dell Inc is strictly forbidden Trademarks used in this text Dell and the DELL logo are trademarks of Dell Inc Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products Dell Inc disclaims any proprietary interest in trademarks and trade names other than its own
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