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Peer-to-peer (P2P) storage systems rely on data redundancy to obtain high levels of data availability. Among the existing data redundancy schemes, erasure coding is a widely adopted scheme in existing P2P storage systems. By properly tunning its parameters, erasure codes can minimize the required data redundancy, which reduces both the storage and the network overheads. However, to perform this optimization,...
The data layout of traditional RAID can't adapt to the heterogeneous RAID that consists of disks with different capacity and/or performance, because it will cause waste of disk storage space and decrease of the integrated disks' bandwidth. Based on the concept of ldquostripe patternrdquo, we bring out the concept of ldquopseudo stripe patternrdquo and propose to place data in heterogeneous RAID with...
In distributed storage systems, erasure codes represent an attractive solution to add redundancy to stored data while limiting the storage overhead. They are able to provide the same reliability as replication requiring much less storage space. Erasure coding breaks the data into pieces that are encoded and then stored on different nodes. However, when storage nodes permanently abandon the system,...
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