Workload-adaptive management of energy-smart disk storage systems

Recent studies have identified disk storage systems as one of the major consumers of power in data centers. Many disk power management (DPM) schemes were suggested where the power consumed by disks is reduced by spinning them down during long idle periods. Spinning the disks down and up results in a...

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Bibliographic Details
Main Authors: Otoo, E., Rotem, D., Shih-Chiang Tsao
Format: Conference Proceeding
Language:English
Subjects:
Costs
Delay
Energy consumption
Energy management
Energy storage
Heuristic algorithms
Laboratories
Power system management
Spinning
Temperature
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Summary:Recent studies have identified disk storage systems as one of the major consumers of power in data centers. Many disk power management (DPM) schemes were suggested where the power consumed by disks is reduced by spinning them down during long idle periods. Spinning the disks down and up results in additional energy and response time costs. For that reason, DPM schemes are effective only if the disks experience relatively long idle periods and the scheme does not introduce a severe response time penalty. In this paper we introduce a dynamic block exchange algorithm which switches data between disks based on the observed workload such that frequently accessed blocks end up residing on a few ldquohotrdquo disks thus allowing the majority of disks to experience longer idle periods. We validate the effectiveness of the algorithm with trace-driven simulations showing power savings of up to 50% with very small response time penalties.
ISSN:1552-5244
2168-9253
DOI:10.1109/CLUSTR.2009.5289151