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Consistency methods and systems

  • US 20070214194A1
  • Filed: 03/07/2006
  • Published: 09/13/2007
  • Est. Priority Date: 03/07/2006
  • Status: Abandoned Application
First Claim
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1. A method for maintaining data consistency of data blocks of a current configuration and a new configuration during migration or reconfiguration of the current configuration within a distributed data-storage system comprising component data-storage systems, the method comprising:

  • in a first phase, determining to reconfigure the current configuration;

    in a second phase, initializing the new configuration and copying data blocks from the current configuration to the new configuration;

    in a third phase, synchronizing the configuration states maintained by the component data-storage systems that store data blocks of the current and new configurations; and

    in a fourth phase, deallocating the current configuration.

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