{"title":"Low bandwidth repair of the RS(10,4) Reed-Solomon code","authors":"I. Duursma, Hoang Dau","doi":"10.1109/ITA.2017.8023449","DOIUrl":null,"url":null,"abstract":"As an alternative to replication of data blocks, the Hadoop Distributed File System offers the possibility of erasure coding using Reed-Solomon codes. The use of Reed-Solomon codes significantly reduces storage overhead but has more expensive failure recovery. Using the shortened Reed-Solomon code RS(10,4), with 10 data symbols and 4 check symbols, standard erasure repair requires downloading 10 symbols or 80 bits. Known schemes attain a reduced repair bandwidth of 65 or 64 bits. In this paper we present three repair schemes with bandwidth 60, 56 and 54, respectively.","PeriodicalId":305510,"journal":{"name":"2017 Information Theory and Applications Workshop (ITA)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2017-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"18","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2017 Information Theory and Applications Workshop (ITA)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ITA.2017.8023449","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 18
Abstract
As an alternative to replication of data blocks, the Hadoop Distributed File System offers the possibility of erasure coding using Reed-Solomon codes. The use of Reed-Solomon codes significantly reduces storage overhead but has more expensive failure recovery. Using the shortened Reed-Solomon code RS(10,4), with 10 data symbols and 4 check symbols, standard erasure repair requires downloading 10 symbols or 80 bits. Known schemes attain a reduced repair bandwidth of 65 or 64 bits. In this paper we present three repair schemes with bandwidth 60, 56 and 54, respectively.
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