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Cisco Bug: CSCvh95731 - zfs snapshots not being cleaned up by FileSystem backup

Last Modified

May 20, 2019

Products (1)

  • Headend System Releases

Known Affected Releases

Backup_restore-7.0.9

Description (partial)

Symptom:
ZFS snapshots remain attached to the file system after a file system backup fails.  The ZFS snapshots record all changes made to the file system, and leaving them will eventually fill up the file system.

Conditions:
Unknown.  

There are many safeguards in the backupFileSystem script, it is unclear why the backup script failed to clean up the snapshots on dpool.

INFO:  Sending dpool snapshots to file:///backup/dncs/FS/FS/dncs_2018-01-17T20:27:10. Please wait...
INFO:    dpool@2018-01-17T20:27:10 [ 31K ]
INFO:    dpool/backups@2018-01-17T20:27:10 [ 10.5G ]
INFO:    dpool/corefiles@2018-01-17T20:27:10 [ 31K ]
INFO:    dpool/disk2@2018-01-17T20:27:10 [ 25.4M ]
INFO:    dpool/tmp@2018-01-17T20:27:10 [ 40.8G ]
ERROR:  User abort, cleanup and exit!
INFO:  Backup Completed.  Removing snaps from localhost.
INFO:  Cleaning up snapshots on dpool.
WARNING:
WARNING:  Failed to cleanup snapshots from dpool.
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Bug Details Include

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