CAPTURING POST-SNAPSHOT QUIESCENCE WRITES IN A LINEAR IMAGE BACKUP CHAIN

摘要

Capturing post-snapshot quiescence writes in a linear image backup chain. In one example embodiment, a method for capturing post-snapshot quiescence writes in a linear image backup chain may include taking a first snapshot of a source storage at a first point in time using a Volume Shadow Copy Service (VSS), identifying a first set of block positions of blocks that are allocated in the source storage at the first point in time, identifying a second set of block positions of blocks that are written to the first snapshot during post-snapshot quiescence of the first snapshot by the VSS or by one or more VSS writers, resulting in a first quiesced snapshot, copying the blocks in the first set from the first snapshot to a full image backup, and copying the blocks in the second set from the first quiesced snapshot to a first incremental image backup.

主权项

1. A method for capturing post-snapshot quiescence writes in a linear image backup chain, the method comprising:
taking a first snapshot of a source storage at a first point in time using a Volume Shadow Copy Service (VSS); identifying a first set of block positions of blocks that are allocated in the source storage at the first point in time; identifying a second set of block positions of blocks that are written to the first snapshot during post-snapshot quiescence of the first snapshot by the VSS or by one or more VSS writers, resulting in a first quiesced snapshot; copying the blocks in the first set of block positions from the first snapshot to a full image backup; and copying the blocks in the second set of block positions from the first quiesced snapshot to a first incremental image backup that depends on the full image backup.