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Proceedings Paper

A new energy saving storage system: SERAID for disk array
Author(s): Fei Wu; Huaixiang Hu; Ke Liu
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Paper Abstract

Recently, high-energy consumption has become a serious concern for both storage servers and data centers. Recent research studies have utilized the short response times of multiple speed disks to decrease energy consumption. However, very few manufactures can produce the multiple speeds hard disk because of its complexity. The main limitation to MAID system is that we must assume the frequently accessed data is less than 5%, in fact, in most strong coupling system, the data can't be cached due to the access pattern and moreover the first accessed data which are usually frequently accessed are not cached, as a result, system performance is heavily degraded. In this paper, we propose the new storage system called saving energy RAID (SERAID), in which we place the frequently accessed data into solid state disks (SSD) and place the less frequently accessed ones into conventional hard disks (CHD). Because the energy consumption is very low and the random read/write rate is very fast in SSD, we can get high availability and high saving energy RAID system at the expense of very few costs. The simulation result shows that the random write performance of SERAID is 10 times rapid than those of traditional RAID and the random read performance of SERAID is 5 times rapid than those of conventional RAID. Besides that, the mean energy consumption of SERAIDsystem is lower than that of traditional RAID.

Paper Details

Date Published: 19 March 2009
PDF: 6 pages
Proc. SPIE 7125, Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage, 71251I (19 March 2009); doi: 10.1117/12.822603
Show Author Affiliations
Fei Wu, Wuhan National Lab. for Optoelectronics, Huazhong Univ. of Science and Technology (China)
Huaixiang Hu, China Electronics Technology Group Corp. (China)
Ke Liu, Wuhan National Lab. for Optoelectronics, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 7125:
Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage
Fuxi Gan, Editor(s)

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