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Data replica control

  • US 9,558,074 B2
  • Filed: 06/10/2011
  • Issued: 01/31/2017
  • Est. Priority Date: 06/11/2010
  • Status: Active Grant
First Claim
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1. One or more non-transitory computer-readable media having program instructions stored thereon that, when executed by a replica control system, direct the replica control system to:

  • in response to a request to update a replica of a target storage volume comprising a virtual drive, identify a plurality of data blocks within an underlying storage volume comprising the virtual drive;

    identify changed data blocks of the plurality of data blocks within the underlying storage volume; and

    identify a subset of the changed data blocks with which to update the replica of the target storage volume based on an allocation status of each of a plurality of data items within the virtual drive that correspond to the changed data blocks within the underlying storage volume and based on a similarity of each of the changed data blocks relative to other changed data blocks associated with another plurality of data blocks within another underlying storage volume.

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