Replication Based Storage Systems With Local Repair

Provided by: Iowa State University
Topic: Storage
Format: PDF
The authors consider the design of regenerating codes for distributed storage systems that enjoy the property of local, exact and uncoded repair, i.e., upon failure, a node can be regenerated by simply downloading packets from the surviving nodes and the number of surviving nodes contacted is strictly smaller than the number of nodes that need to be contacted for reconstructing the stored file. Their codes consist of an outer MDS code and an inner fractional repetition code that specifies the placement of the encoded symbols on the storage nodes.

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