Power Regulator; Basic Power Capping For Each Server Blade; Hp Dynamic Power Capping - HP Xw460c - ProLiant - Blade Workstation Overview

NOTE
In redundant environments, at least two power supplies are
always active, and the maximum load that can be reached on
any power supply is 50%. Once the 50% load is reached,
another two power supplies are activated to ensure that
redundancy is maintained at all times.

Power Regulator

HP ProLiant Power Regulator provides iLO-controlled speed stepping for Intel x86 and recent AMD
processors. The Power Regulator feature improves server energy efficiency by giving processors full
power when they need it and reducing power when they do not. This power management feature
allows ProLiant servers with policy-based power management to control processor power states.
Power Regulator can be configured for continuous, static low power mode or for Dynamic Power
Savings mode in which power is automatically adjusted to match processor demand. Additional
information on the HP Power Regulator is provided in the paper titled ―Power Regulator for ProLiant
servers‖:
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00593374/c00593374.pdf.

Basic Power Capping for each server blade

Using ProLiant Onboard Administrator (iLO 2) firmware version 1.30 and System ROM/BIOS dated
May 1, 2007, or later, ProLiant server blades can limit the amount of power consumed. Customers
can set a limit in watts or BTUs per hour. The purpose of this limit is to constrain the amount of power
consumed, which reduces heat output into the data center. The ProLiant Onboard Administrator (iLO
2) firmware monitors server power consumption, checks it against the power cap goal, and, if
necessary, adjusts server performance to maintain an average power consumption that is less than or
equal to the power cap goal. This functionality is available on all ProLiant server blades using Intel or
recent AMD processors.
Using the Insight Power Manager (IPM) v1.10 plug-in to HP Systems Insight Manager v5.1, customers
can set power caps on groups of supported servers. The IPM software statically allocates the group
power cap among the servers in the group. The group cap is allocated equitably among all servers in
the group based on a calculation using the idle and maximum measured power consumption of each
server. In addition, IPM can track and graph over time the actual power use of groups of servers and
enclosures. This provides data center facilities managers with measured power consumption for
various time periods, reducing the need to install monitored PDUs to measure actual power use in
data centers.

HP Dynamic Power Capping

HP launched Dynamic Power Capping in December 2008 with ProLiant Onboard Administrator
(iLO 2) version 1.70. Supported servers contain an internal hardware circuit that monitors server
power consumption on a sub-second basis. If consumption approaches the power cap set in ProLiant
Onboard Administrator (iLO 2), the internal hardware circuit will limit power consumption quickly
enough to protect PDU-level circuits from over-subscription and prevent power-related server outages.
At the enclosure level, HP Enclosure Dynamic Power Capping lets administrators set an enclosure level
power cap. The BladeSystem Onboard Administrator manages the power distribution to the server
blades and will change server caps over time as workloads change. Enclosure Dynamic Power
Capping requires redundant power wired to separate A and B feeds, redundant BladeSystem
Onboard Administrator modules using firmware version 2.30 or later, and supported servers using
ProLiant Onboard Administrator (iLO 2) version 1.70 or later.
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