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Power Consumption Prediction and Power-Aware Packing in Consolidated Environments

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5 Author(s)
Jeonghwan Choi ; Sch. of Inf. & Commun. Eng., Sungkyunkwan Univ., Suwon, South Korea ; Govindan, S. ; Jinkyu Jeong ; Urgaonkar, B.
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Consolidation of workloads has emerged as a key mechanism to dampen the rapidly growing energy expenditure within enterprise-scale data centers. To gainfully utilize consolidation-based techniques, we must be able to characterize the power consumption of groups of colocated applications. Such characterization is crucial for effective prediction and enforcement of appropriate limits on power consumption-power budgets-within the data center. We identify two kinds of power budgets: 1) an average budget to capture an upper bound on long-term energy consumption within that level and 2) a sustained budget to capture any restrictions on sustained draw of current above a certain threshold. Using a simple measurement infrastructure, we derive power profiles-statistical descriptions of the power consumption of applications. Based on insights gained from detailed profiling of several applications-both individual and consolidated-we develop models for predicting average and sustained power consumption of consolidated applications. We conduct an experimental evaluation of our techniques on a Xen-based server that consolidates applications drawn from a diverse pool. For a variety of consolidation scenarios, we are able to predict average power consumption within five percent error margin and sustained power within 10 percent error margin. Using prediction techniques allows us to ensure safe yet efficient system operation-in a representative case, we are able to improve the number of applications consolidated on a server from two to three (compared to existing baseline techniques) by choosing the appropriate power state that satisfies the power budgets associated with the server.

Published in:

Computers, IEEE Transactions on  (Volume:59 ,  Issue: 12 )

Date of Publication:

Dec. 2010

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