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Computer storage system with redundant storage servers and at least one cache server

  • US 8,145,837 B2
  • Filed: 01/03/2008
  • Issued: 03/27/2012
  • Est. Priority Date: 01/03/2007
  • Status: Active Grant
First Claim
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1. A computer-implemented storage system comprising:

  • a plurality of redundant storage servers, each redundant storage server coupled to each of a plurality of disk servers through a respective communication path, each communication path between a redundant storage server and a disk server not including an additional redundant storage server, each disk server having at least one mass storage disk operable to store data, the data segmented according to a plurality of logical blocks, each logical block having an associated logical block identifier, the plurality of redundant storage servers operable to;

    replicate each logical block of at least two of the plurality of disk servers; and

    at least one cache server comprising a cache memory, the at least one cache server coupled to each redundant storage server, the at least one cache server operable to;

    receive a request from a client coupled to the at least one cache server, the request comprising a plurality of logical block identifiers of data stored by the plurality of disk servers that are coupled to the plurality of redundant storage servers;

    access the replicated logical blocks according to the plurality of logical block identifiers; and

    cache, in the cache memory, a portion of the replicated logical blocks according to the plurality of logical block identifiers.

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