Replicating selected snapshots from one storage array to another, with minimal data transmission
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United States of America Patent
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Oct 18, 2016
Grant Date -
N/A
app pub date -
Jul 18, 2014
filing date -
Jun 24, 2011
priority date (Note) -
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Abstract
Example embodiments of the present invention provide methods for replicating a production site snapshot to a replication site. A first example embodiment creates a snapshot of the production volume at the production site and creates a bookmark in a do metadata stream. The bookmark may be sent to the replication site and, when processed from the do metadata stream at the replication site, cause the replication site to create a snapshot of the replication volume according to the bookmark. A second example embodiment replicates to a replication site snapshot by generating a list of differences between the production site snapshot and the replication site snapshot and performs replication according to the differences. The differences may include differences between the production site volume and the production site snapshot, differences between the production site volume and the replication site volume and differences between the replication site volume and the replication site snapshot.
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