A Survey on Network Codes for Distributed Storage

Details A Survey on Network Codes for Distributed Storage A Survey on Network Codes for Distributed Storage

2010-04-26

arxiv.org/abs/1004.4438v1

Computer Science

Information Theory

13 pages, 11 figures.

Scientific paper

Distributed storage systems often introduce redundancy to increase reliability. When coding is used, the repair problem arises: if a node storing encoded information fails, in order to maintain the same level of reliability we need to create encoded information at a new node. This amounts to a partial recovery of the code, whereas conventional erasure coding focuses on the complete recovery of the information from a subset of encoded packets. The consideration of the repair network traffic gives rise to new design challenges. Recently, network coding techniques have been instrumental in addressing these challenges, establishing that maintenance bandwidth can be reduced by orders of magnitude compared to standard erasure codes. This paper provides an overview of the research results on this topic.

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