NDLI: Workload-adaptive management of energy-smart disk storage systems

Content Provider	IEEE Xplore Digital Library
Author	Otoo, E. Rotem, D. Shih-Chiang Tsao
Copyright Year	2009
Description	Author affiliation: Lawrence Berkeley National Laboratory, University of California, 1 Cyclotron Road, Berkeley, CA 94720 (Otoo, E.; Rotem, D.; Shih-Chiang Tsao)
Abstract	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 “hot” 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.
Starting Page	1
Ending Page	11
File Size	593217
Page Count	11
File Format	PDF
ISBN	9781424450114
ISSN	15525244
DOI	10.1109/CLUSTR.2009.5289151
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-08-31
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Energy management Energy storage Spinning Delay Heuristic algorithms Power system management Costs Energy consumption Temperature Laboratories
Content Type	Text
Resource Type	Article

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