Thermal Logic And Dynamic Power Capping Reclaim Trapped Power Capacity - Compaq BL10e - HP ProLiant - 512 MB RAM Introduction Manual

attention of the CIO, and many organizations are now being asked to find creative ways to
reduce power consumption and better utilize existing facilities while maintaining or improving the
quality of IT service delivery. Faced with half-filled racks, a lack of power and cooling capacity
and no budget to increase capacity, IT organizations and their facilities counterparts are forced to
abandon traditional power-budgeting techniques, such as budgeting to power supply faceplate
levels. They must find more precise ways to measure actual power requirements and the means to
control the power that those devices consume.
Dynamic Power Capping Reclaims Trapped Power
Capacity
The Thermal Logic portfolio of products and technology provides an answer to the dilemma posed
by increasing data center power and cooling costs. First, HP energy-efficient servers deliver
maximum performance per watt, helping reduce the amount of power required to deliver IT
services. Also, starting in mid-December, 2008, HP will deliver Dynamic Power Capping, a
solution that allows systems administrators to reclaim trapped power and cooling capacity by
safely limiting the amount of power consumed by one or more ProLiant servers or HP BladeSystem
c7000 enclosures without impacting server performance.
Figure 1 illustrates the benefit of Dynamic Power Capping. Power consumption of IT equipment
within the data center is represented by the curve at the bottom of the diagram. The amount of
power consumed will vary over time as workload intensity varies. The amount of power budgeted
for the same equipment is represented by the "Allocated power capacity (per faceplate)" or
"Allocated power capacity (per power calculator)" lines. The "Actual peak power usage" line
represents the maximum power used by equipment in the data center over time. By using
Dynamic Power Capping and setting server or blade enclosure power caps to the actual peak
power usage, IT departments are able to reclaim the amount of power capacity represented by
the distance between the allocated power capacity lines and the actual peak power usage line.
Companies that currently budget to faceplate will see the greatest power-capacity benefit.
Companies that budget power using tools such as the HP Power Calculator also stand to reclaim
significant power capacity. By setting the Dynamic Power Cap at the actual peak-power usage,
power is reclaimed without impacting performance.
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