Data recovery using bitmap data structure

A computer-readable storage medium that when executed on a computer, causes the computer to execute a process comprising:

• receiving a temporal identifier from a target device;
• determining that a primary replication method is unable to be used to replicate data associated with the temporal identifier;
• and
• initiating replication of data using a secondary replication method, wherein the secondary replication method utilizes a recovery bitmap identifying data blocks that have changed on a source device since a previous event.

A method comprising:

• receiving a log sequence number (LSN) from a target device;
• determining that a log-based replication method is unable to be used to replicate data associated with the LSN;
• and
• initiating replication of data using a bitmap-based replication method, wherein the bitmap-based replication method utilizes a recovery bitmap identifying data blocks that have changed on a source device since a previous event.