HP ML330 Dynamic Power Capping TCO and Best Practices White Paper (EMEA editio - Page 3
Dynamic Power Capping Reclaims Trapped Power Capacity
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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. 3