Snapshots locked by dump cannot be deleted
Applies to
- ONTAP 8.1x 7-mode
- ONTAP 8.2x 7-mode
- ONTAP 8.3x and later
- ONTAP 9x and later
- NDMP backup
Issue
- When the NDMP server calls dump to perform a backup, a “snapshot_for_backup” is created
- snapshot_for_backup is a consistency snapshot that remains in place until the dump completes or aborts
- snapshot_for_backup is locked by dump, and will remain locked until the dump completes or aborts
- In normal operation, snapshot_for_backup is deleted after dump notifies NDMP that it has completed, or aborted
- In rare circmustances, the NDMP server can no longer communicate with dump
- When the NDMP server has lost connection with its associated dump session, attempts to delete snapshot_for_backup generate the error:
Error: Snapshot copy [snapshot name] of volume [vol name] on Vserver [vserver name] has not expired or is locked.
- Output of
vol snapshot showindicates "busy" true, and "owners" dump:
::> vol snapshot show -vserver [vserver name] -volume [vol name] -snapshot snapshot* -fields create-time,owners,busy
vserver volume snapshot create-time busy owners
---------- ------ ------------------------ ------------------------ ---- ------
********** ****** snapshot_for_backup.2087 Sat Oct 26 04:23:08 2019 true dump