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Power Policy (Power Capping)
18 Benchmark the Performance, Reliability and Scalability of Dell EMC OpenManage Enterprise Power Manager
2.0 in Data Center Environment
7 Power Policy (Power Capping)
Create and apply power policies for regulating the power consumption of a device or a group of devices.
Power Manager supports applying a Power Policy on a single target device or single static or physical group
at a time from the policy creation wizard.
7.1 Configuration Details and Generic Recommendations
7.1.1 Configuration Details
Applying a Power Policy is supported on individual devices, static groups, and physical groups. Tests were
performed by creating 400 Power Policies and applying them on 400 devices sequentially.
7.1.2 Recommendations
After analyzing the test results, following are the recommendations for using Power Policy feature:
• It is recommended to create Static and Rack Physical Groups with not more than 40 devices for all
Power Policy actions.
• Ensure that the target devices are reachable to Power Manager and is responsive with respect to the
management protocols. Higher number of non-responsive devices and network latency can cause
failures during Power Policy deployments.
• If policies are applied at individual device level, ensure that you select a maximum of up to 200
policies to perform any simultaneous policy related actions on the devices for maximum performance
optimization.
• If multiple Power Policies are applied on an Individual Device or a Group, then there is an increase in
the computation time for Power Manager that results in slightly higher time duration for applying
policies in a scaled infrastructure.
7.2 Test Results in Scaled Infrastructure
Test results were very similar when Power Policies related actions were performed on individual devices,
Static Groups, and Physical groups. Hence the data captured for all the following actions are on Physical
Groups. Following actions were tested in scaled infrastructure for Enterprise business Large scale
deployment.
• Apply Power Policy
• Disable Power Policy
• Enable Power Policy
• Delete Power Policy
Power Policy action is applied on 400 devices that are in a single Physical Group (Datacenter level) across 10
racks, to ensure that the policy action is triggered simultaneously for all devices without any lag or obstruction.
The following graphs represent the CPU and Memory utilization of Task Execution Service during different
power policy actions.