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Rebuilding for Array Codes in Distributed Storage Systems

Wang, Zhiying and Dimakis, Alexandros G. and Bruck, Jehoshua (2010) Rebuilding for Array Codes in Distributed Storage Systems. California Institute of Technology , Pasadena, CA. (Unpublished) http://resolver.caltech.edu/CaltechPARADISE:2010.ETR103

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Abstract

In distributed storage systems that use coding, the issue of minimizing the communication required to rebuild a storage node after a failure arises. We consider the problem of repairing an erased node in a distributed storage system that uses an EVENODD code. EVENODD codes are maximum distance separable (MDS) array codes that are used to protect against erasures, and only require XOR operations for encoding and decoding. We show that when there are two redundancy nodes, to rebuild one erased systematic node, only 3=4 of the information needs to be transmitted. Interestingly, in many cases, the required disk I/O is also minimized.


Item Type:Report or Paper (Technical Report)
Group:Parallel and Distributed Systems Group
Record Number:CaltechPARADISE:2010.ETR103
Persistent URL:http://resolver.caltech.edu/CaltechPARADISE:2010.ETR103
Usage Policy:You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.
ID Code:26134
Collection:CaltechPARADISE
Deposited By: Imported from CaltechPARADISE
Deposited On:01 Sep 2010
Last Modified:26 Dec 2012 13:54

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