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Conference Paper: A RAID reconfiguration scheme for gracefully degraded operations

TitleA RAID reconfiguration scheme for gracefully degraded operations
Authors
KeywordsComputers
Computer architecture
Issue Date1999
PublisherIEEE.
Citation
Proceedings of the 7th Euromicro Workshop on Parallel and Distributed Processing 1999, Funchal, Portugal, 3-5 February 1999, p. 66-73 How to Cite?
AbstractOne distinct advantage of Redundant Array of Independent Disks (RAID) is fault tolerance. But the performance of a disk array in degraded mode is so poor that no one uses the RAID after failure. Continuous operation of RAID in degraded mode is very important in many real time applications, which can not be interrupted in providing continuous services. In this paper, we propose an efficient architectural reconfiguration scheme to enhance the performance of RAID-5 in degraded mode, called reconfigurable RAID-5. It reconfigures RAID-5 to RPTD-0 in degraded mode. Using this scheme, the calculation of the failure data and the generation of parity in writing the new data to the failed disk can be reduced. It also alleviates the small write problem for RAID-5 in degraded mode. We use the phase parallel model to analyze the total execution time of the RAID-5 and of the reconfigurable RAID-5. Through theoretical analysis and benchmark test, we find the performance of the reconfigurable RAID-5 can be 200 times better than conventional RAID-5.
Persistent Identifierhttp://hdl.handle.net/10722/54071
ISSN

 

DC FieldValueLanguage
dc.contributor.authorJin, Hen_HK
dc.contributor.authorHwang, Ken_HK
dc.contributor.authorZhang, Jen_HK
dc.date.accessioned2009-04-03T07:35:58Z-
dc.date.available2009-04-03T07:35:58Z-
dc.date.issued1999en_HK
dc.identifier.citationProceedings of the 7th Euromicro Workshop on Parallel and Distributed Processing 1999, Funchal, Portugal, 3-5 February 1999, p. 66-73en_HK
dc.identifier.issn1066-6192en_HK
dc.identifier.urihttp://hdl.handle.net/10722/54071-
dc.description.abstractOne distinct advantage of Redundant Array of Independent Disks (RAID) is fault tolerance. But the performance of a disk array in degraded mode is so poor that no one uses the RAID after failure. Continuous operation of RAID in degraded mode is very important in many real time applications, which can not be interrupted in providing continuous services. In this paper, we propose an efficient architectural reconfiguration scheme to enhance the performance of RAID-5 in degraded mode, called reconfigurable RAID-5. It reconfigures RAID-5 to RPTD-0 in degraded mode. Using this scheme, the calculation of the failure data and the generation of parity in writing the new data to the failed disk can be reduced. It also alleviates the small write problem for RAID-5 in degraded mode. We use the phase parallel model to analyze the total execution time of the RAID-5 and of the reconfigurable RAID-5. Through theoretical analysis and benchmark test, we find the performance of the reconfigurable RAID-5 can be 200 times better than conventional RAID-5.en_HK
dc.languageengen_HK
dc.publisherIEEE.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rights©1999 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.en_HK
dc.subjectComputersen_HK
dc.subjectComputer architectureen_HK
dc.titleA RAID reconfiguration scheme for gracefully degraded operationsen_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1066-6192&volume=&spage=66&epage=73&date=1999&atitle=A+RAID+reconfiguration+scheme+for+gracefully+degraded+operationsen_HK
dc.identifier.emailHwang, K: kaihwang@hkueee.hku.hken_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1109/EMPDP.1999.746647en_HK
dc.identifier.hkuros46253-

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