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Saving power in flash and disk hybrid storage system

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4 Author(s)
Prada, L. ; Comput. Sci. Dept., Univ. Carlos III of Madrid, Leganes, Spain ; Garcia, J.D. ; Carretero, J. ; Garcia, F.

This paper considers the question of saving energy in the disk drive making advantage of diverse devices in a hybrid storage system employing flash and disk drives. The flash and disk offer different power characteristics, being flash much less power consuming than the disk drive. We propose a technique that uses a flash device as a cache for a single disk device. We examine various options for managing the flash and disk devices in such a hybrid system and show that the proposed method saves energy in diverse scenarios. We implemented a simulator composed of disk and flash devices. This paper gives an overview of the design and evaluation of the proposed approach with the help of realistic workloads.

Published in:

Modeling, Analysis & Simulation of Computer and Telecommunication Systems, 2009. MASCOTS '09. IEEE International Symposium on

Date of Conference:

21-23 Sept. 2009