Zoned-RAID for multimedia database servers

Authors:
Ali E. Dashti;Seon Ho Kim;Roger Zimmermann
Affiliations:
Electrical and Computer Engineering Department, Kuwait University, Safat, Kuwait;Department of Computer Science, University of Denver, Denver, CO;Department of Computer Science, University of Southern California, Los Angeles, CA
Venue:
DASFAA'05 Proceedings of the 10th international conference on Database Systems for Advanced Applications
Year:
2005

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Zoned-RAID

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Abstract

This paper proposes a novel fault-tolerant disk subsystem named Zoned-RAID (Z-RAID). Z-RAID improves the performance of traditional RAID system by utilizing the zoning property of modern disks which provides multiple zones with different data transfer rates in a disk. This study proposes to optimize data transfer rate of RAID system by constraining placement of data blocks in multi-zone disks. We apply Z-RAID for multimedia database servers such as video servers that require a high data transfer rate as well as fault tolerance. Our analytical and experimental results demonstrate the superiority of Z-RAID to conventional RAID. Z-RAID provides a higher effective data transfer rate in normal mode with no disadvantage. In the presence of a disk failure, Z-RAID still performs as well as RAID.