Power Meter; Hp Power Capping - HP AB500A - Integrated Lights-Out Advanced Technology Brief

Power Meter

Being able to quantify how much power a server is actually using is the first step in managing power
consumption at the server or facility level. Beginning with iLO 2 v 1.11, administrators can view
actual system power consumption data in watts and Btu/hr. A snapshot of this historical data
(Figure 6) is accessible from all iLO 2 interfaces. The data can be recorded and saved every
5 minutes. For example, a graphical display of power consumption can be retained up to 24 hours.
Figure 6. Power meter information can be retrieved from the iLO 2 processor from any web browser.

HP Power Capping

Some ProLiant servers support basic HP Power Capping. HP Power Capping provides strict control of
a server's maximum power consumption. iLO firmware adjusts server power performance to stay
below the specified power cap. This allows an administrator to more effectively allocate data center
cooling resources based on real server power consumption.
On servers that support basic Power Capping, the iLO 2 firmware monitors the power consumption of
the server and checks it against a power cap set by the administrator. If necessary, iLO 2 adjusts the
performance of the server to maintain an average power consumption that is less than or equal to the
power cap goal.
Basic power capping requires the following system firmware:
• iLO 2 version 1.30 or later
• System BIOS 2007.05.01 or later
Administrators should refer to the ProLiant server user guide for additional information about power
capping and to determine whether power capping is supported for their server.
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