CPC G06F 11/1407 (2013.01) [G06F 11/1451 (2013.01); G06F 11/2074 (2013.01); G06F 11/2082 (2013.01); G06F 2201/84 (2013.01); G06F 2201/855 (2013.01)] | 20 Claims |
1. A method comprising:
maintaining at a source device a plurality of target-specific hierarchical bitmap structures for a plurality of target devices, wherein each of the target-specific hierarchical bitmap structures comprises a recovery bitmap and an accumulating bitmap for one of the plurality of target devices, the accumulating bitmap corresponding to data records in a previous virtual log;
receiving a temporal identifier from a first target device of the plurality of target devices; and
initiating replication of data for the first target device using a bitmap replication method, wherein the bitmap replication method utilizes a recovery bitmap for the first target device that identifies data blocks that have changed on the source device since a previous replication of data to the first target device through a transaction indicated by the temporal identifier.
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