retentionDays

Set the number of days to retain backup data. During this time, you can restore the current version to any backup version. The value range of days is 0,30, and the default value is 1. 0 means backup is turned off. The effective policy after adjusting the backup cycle is: Extend the backup cycle: The new backup cycle takes effect on the same day. Shorten the backup cycle: The system will automatically delete backup data that has exceeded the retention cycle.