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23155 Analysis of disk power management for data-center storage systems
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Bostoen, T. and Mullender, S.J. and Berbers, Y. (2012) Analysis of disk power management for data-center storage systems. In: Proceedings of the third International Conference on Future Energy Systems: Where Energy, Computing and Communication Meet (e-Energy 2012), 9-11 May 2012, Madrid, Spain. 2. ACM. ISBN 978-1-4503-1055-0

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Up to one third of the electricity supplied to a data center is required for the operation of the storage subsystem. A typical data-center workload, characterized by short idle periods, prevents traditional disk power management (DPM) from saving energy. This paper starts with an analysis of DPM's traditional timer-based disk spin-down policy. Next, we examine how a multispeed disk adapts DPM to data-center workloads. Finally, we determine how to shape the workload to enable DPM on conventional server disks. All analysis is based on an analytical model for the energy consumed by a disk during an idle period. In addition, we assume standby power to be non-negligible. The results are that (1) the competitive ratio of a threshold-based disk spin-down policy depends on the ratio of standby power to idle power, (2) the notion of break-even time can be generalized for multispeed disks, and (3) DPM saves most energy when mean idle time and idle-time variance are maximized. With this analysis, the authors intend to stimulate the design of new data-center file and storage systems that optimally exploit DPM to save energy.

Item Type:Conference or Workshop Paper (Full Paper, Talk)
Research Group:EWI-PS: Pervasive Systems
Research Program:CTIT-WiSe: Wireless and Sensor Systems
ID Code:23155
Deposited On:28 March 2013
More Information:statisticsmetis

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