HP Insight Control Power Management 7.0 User Guide

5. Consider the business importance of the performance of an individual system before apply
any cap that is significantly below the Calibrated Max Power. If the response time of the
system is critically important, you must apply caps to other systems and ensure that your critical
systems always have access to the absolute highest performance they can deliver.
Task: Reclaiming power/thermal capacity for a new system
As you deploy the new system in your data center, you must select a location that has following
sufficient resources:
• Physical space in a rack to mount the system
• Power delivery capacity to plug it into
• Thermal capacity, or sufficient cooling, to avoid overheating it and surrounding systems
• Network connectivity of the proper type and bandwidth
• Location with other related systems and other organizational issues
If the power requirements for the system slightly exceed the power or thermal capacity within the
chosen rack, you can configure power capping to this system and others in the rack to ensure all
get the necessary resources, without wasted allocation. If you are deploying a system, you can
apply the cap value to the enclosure that will include the system to ensure the power capacity of
the power delivery devices and thermal capacity of the rack are not exceeded. Then, insert the
system in the enclosure. The cap value is divided among the other systems in the enclosure. If it is
not a system, you must determine the number of watts required by the new system. You can use
the HP Power Calculator, or more accurately start the system and determine its Calibrated Max
Power. You can obtain this value from the Power/Thermal Analysis views or Power/Thermal data
report pages of power management. You can also obtain the value from the Power Management
Settings page of the system's iLO page, where it is mentioned as Server Maximum Power, as shown
below:
Figure 8 Power Management Settings page of HP Integrated Lights-Out 2
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:
26 Managing power and cooling facilities in your data center