Transcription of Erasure Coding in Windows Azure Storage - microsoft.com
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Erasure Coding in Windows Azure Storage - microsoft.com
Erasure Coding in Windows Azure StorageCheng Huang, Huseyin Simitci, Yikang Xu, Aaron Ogus, Brad Calder, Parikshit Gopalan, Jin Li, and Sergey YekhaninMicrosoft CorporationAbstractWindows Azure Storage (WAS) is a cloud Storage sys-tem that provides customers the ability to store seem-ingly limitless amounts of data for any duration of customers have access to their data from anywhere,at any time, and only pay for what they use and store. Toprovide durability for that data and to keep the cost ofstorage low, WAS uses Erasure this paper we introduce a new set of codes for era-sure Coding called Local Reconstruction Codes (LRC).LRC reduces the number of Erasure Coding fragmentsthat need to be read when reconstructing data fragmentsthat are offline, while still keeping the Storage overheadlow. The important benefits of LRC are that it reduces thebandwidth and I/Os required for repair reads over priorcodes, while still allowing a significant reduction in stor-age overhead.
Microsoft Corporation Abstract Windows Azure Storage (WAS) is a cloud storage sys- ... storage system that has been in production since Novem-ber 2008. It is used inside Microsoft for applications such as social networking search, serving video, music …
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