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Replicating selected snapshots from one storage array to another, with minimal data transmission

  • US 8,805,786 B1
  • Filed: 06/24/2011
  • Issued: 08/12/2014
  • Est. Priority Date: 06/24/2011
  • Status: Active Grant
First Claim
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1. A computer-implemented method for replicating a snapshot of a production volume at a production site storage array to a snapshot of a replication volume at a replication site storage array, the method comprising:

  • creating the snapshot of the production volume at the production site storage array; and

    creating a bookmark indicative of a time the snapshot of the production volume was created, comprising;

    creating the bookmark at the production site;

    sending the bookmark to the replication site; and

    storing the bookmark in a do metadata stream of a journal maintained at the replication site;

    creating a snapshot of the replication volume at the replication site storage array according to the bookmark, comprising;

    applying data to the replication volume from the do metadata stream of the journal maintained at the replication site; and

    creating the snapshot of the replication volume at the replication site if the data applied to the replication volume from the do metadata stream is the bookmark.

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