HP Insight Control Power Management 6.2 User Guide

Then, determine the amount of power must be reclaimed to make the necessary power/thermal capacity
available in the rack.
When applying caps, use the following guidelines:
1. As the power demand varies, Enclosure Dynamic Power Capping can share caps between systems, it
is the first place to investigate when capping and there is typically significant capacity that can be
reclaimed by applying caps to enclosures.
2. If you have multiple enclosures, reclaim similar percentages of capacity of the headroom from each
enclosure instead of a large amount of headroom from a single enclosure.
3. When applying power cap value to individual systems, you need to be careful not to impact their
performance because of increase in load beyond the historically observed loads result in reduced
performance. Again, reclaiming a small percentage of capacity from multiple systems is preferable and
less likely to have a significant impact on performance.
4. When reclaiming power delivery capacity, you must ensure not to remove or increase power cap values
without proper planning as it could lead to overload of the circuit capacity.
Task: Classifying systems by business criticality
Based on business criticality, you can classify systems using the Customize Collections option of HP Systems
Insight Manager. The systems that you want to classify are controlled by the collections in the Systems by
Service Class group. You can find the collections under Systems > Shared > Systems by Service Class
in the System and Event Collections tree view from the left pane of the Systems Insight Manager home
page.
To add service classes and remove or rename existing service classes, use the Customize ... option at the
top of the tree view to change the set of collections within Systems by Service Class.
To classify a system, use the Customize... option to add the system to the collection for its service class.
For more information on changing HP Systems Insight Manager collections, see Chapter 17 Collections in
HP Systems Insight Manager in HP Systems Insight Manager User Guide available at http://
h18002.www1.hp.com/products/servers/management/hpsim/infolibrary.html.
Task: Defining rules to reduce power consumption
HP Insight Control power management supplies pre-defined rules for reducing power consumption through
the Data Center Power Control facility. To create rules specific to your environment, start with one of the
pre-defined rules, customize it for your environment, and then mark it as "Ready for Use".
Task: Classifying systems by business criticality 27