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Distributed snapshot process

  • US 8,966,197 B2
  • Filed: 09/21/2011
  • Issued: 02/24/2015
  • Est. Priority Date: 01/21/2003
  • Status: Active Grant
First Claim
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1. A first storage server comprising:

  • a resource storage device, for storing a first subset of a partitioned resource;

    a first connection, for accessing a second subset of the partitioned resource stored on a second storage server, and for exchanging information with the second storage server so that the first and second storage servers operate as a storage area network;

    a second connection, for providing access to the partitioned resource as a whole by one or more network clients;

    a routing table storage device, for maintaining a routing table indicating which of the first or second servers is responsible for which subset of the partitioned resource; and

    a processor, for executing a snapshot process, the snapshot process determining data indicative of a state of at least the first subset of the partitioned resource, and for receiving data over the first connection from the second storage server indicative of a state of at least the second subset of the partitioned resource, and the snapshot process also generating snapshot state information representative of the partitioned resource as a whole, the snapshot state information being representative of a state of partitioned data as maintained by the first and second storage servers, and including at least information concerning a file structure of such partitioned data.

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