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Synchronizing logical views independent of physical storage representations

  • US 20050027747A1
  • Filed: 07/29/2003
  • Published: 02/03/2005
  • Est. Priority Date: 07/29/2003
  • Status: Active Grant
First Claim
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1. In computer system that is included in a topology for synchronizing a plurality of replicas, the computer system including a source replica from among the plurality of replicas, the physical layout of items stored at the source replica differing from the physical layout of corresponding items stored at one or more other replicas, a method for synchronizing replicas comprising:

  • an act of receiving a synchronization indication that the source replica is to be synchronized with the destination replica from among the plurality of replicas;

    an act of determining if items in the physical layout at the source replica have changed;

    an act of mapping any changed items in the physical layout at the source replica to a logical view, the logical view being substantially similar to logical views at one more other replicas in the topology, so as to increase the efficiency of synchronizing the source replica with the one or more other replicas, or to avoid any changes to the source replica when a new replica with different physical storage format is introduced into the sync topology; and

    an act of sending at least one mapped item from the source replica to the destination replica.

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