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  1. Lustre
  2. LU-10843

snapshot_create fails after MGS restart

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: Lustre 2.10.3
    • Fix Version/s: Lustre 2.12.0, Lustre 2.10.5
    • Labels:
      None
    • Severity:
      3
    • Rank (Obsolete):
      9223372036854775807

      Description

      If the MGS is unmounted and remount (or failed over) lctl snapshot_create fails with the following error:

      # lctl snapshot_create -F scratch -n test
      Fail to freeze barrier for scratch: No such device
      Can't create the snapshot test
      

      snapshot_destroy still works without issue.

      WORKAROUND: unmount/mount the MDT and snapshot_create will commence working again.

      NOTE: mount -o remount is insufficient

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            • Assignee:
              utopiabound Nathaniel Clark
              Reporter:
              utopiabound Nathaniel Clark
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              • Created:
                Updated:
                Resolved: