When you attempt to delete backup sets, Database Backup (DBS) forcibly retains the minimal backup sets to avoid deleting all backup sets. This helps eliminate the risk that backup data cannot be restored.
- DBS dumps and deletes backup sets based on the lifecycle of backup sets that you configured.
- DBS allows you to delete the earliest and latest backup sets of a database or an instance, whereas you cannot delete the intermediate backup sets. This helps guarantee the continuity of backup data.
- By default, DBS retains the three latest backup sets of a database or an instance. If you attempt to delete these backup sets, two of them are forcibly retained.