UTILIZING AN INCREMENTAL BACKUP IN A DECREMENTAL BACKUP SYSTEM

摘要

Utilizing an incremental backup in a decremental backup system. In one example embodiment, a method for utilizing an incremental backup in a decremental backup system includes creating a base backup that includes all original allocated blocks in a source storage at a first point in time. Next, an incremental backup is created that includes allocated blocks in the source storage that were newly allocated or were changed between the first point in time and a second point in time. The changed allocated blocks in the incremental backup are identified. During a third time period, a decremental backup is created and the incremental backup is ingested into the base backup by copying, into the decremental backup, original allocated blocks from the base backup that correspond to the changed allocated blocks in the incremental backup. Lastly, the newly-allocated blocks and the changed allocated blocks from the incremental backup are added to the base backup.

主权项

1. A method for utilizing an incremental backup in a decremental backup system, the method comprising:
creating a base backup that includes all original allocated blocks in a source storage at a first point in time; creating an incremental backup that includes allocated blocks in the source storage that were newly allocated or were changed between the first point in time and a second point in time; identifying the changed allocated blocks in the incremental backup; and during a third time period, creating a decremental backup and ingesting the incremental backup into the base backup by copying, into the decremental backup, original allocated blocks from the base backup that correspond to the changed allocated blocks in the incremental backup and adding the newly-allocated blocks from the incremental backup and the changed allocated blocks from the incremental backup to the base backup.