Choose an expiration policy
You can choose from the following three expiration policies:
- Retention date (-t)
- Deletes all backups before a particular date and time.
- Retention interval (-i)
- Deletes all backups older than a specified period.
- Retention generation (-g)
- Keeps a certain number of versions of each backup.
ON-Bar always retains the latest level-0 backup for each storage space. It expires all level-0 backups older than the specified time unless they are required to restore from the oldest retained level-1 backup.
ON-Bar expires all level-1 backups older than the specified time unless they are required to restore from the oldest retained level-2 backup.
ON-Bar retains a whole-system backup that starts before the specified retention time and ends after the specified retention time.