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Archiving Based on Access Time Rule using Native Snapshot

Applicable to: UNIX File Systems

Backing up a file will cause the file access time to change to the time of the backup. This might have an undesired effect when you archive files based on the access time rule. To prevent the file access time from changing, you can enable the backup process to create a snapshot of the volume to be archived and then perform a backup of the snapshot copy.

The following client configurations are supported for creating native snapshots. The archive job will fail if the volume is not supported for creating native snapshots.

Software Storage Array

LVM on Linux

CXBF on Linux

LVM on AIX (jfs2)

CXBF on AIX

HP-UX (vxfs)

ZFS on Solaris

CXBF on Solaris

Note: When you enable the Use native snapshot to preserve file access time option, the backup job will fail at the start of the scan phase if any of the subclient content paths are not valid.

Procedure

  1. From the CommCell Browser, expand Client Computers > client > File System > archive_set.
  2. Right-click the archiving_subclient, and then click Properties.

    The Subclient Properties dialog box appears.

  3. Select the Use native snapshot to preserve file access time check box.
  4. Click OK.

Snapshot Cleanup

  • If the backup job fails during the scan phase or is suspended, the snapshots will be unmounted and deleted. If the snapshot has any open files or directories, the snapshot cannot be unmounted. In such cases, the snapshot will be cleaned up the next time a job is run for the subclient.
  • Snapshots will be unmounted and deleted if the jobs are suspended during the backup phase. The snapshots will be re-created when the backup job is resumed.
  • If the backup job crashes or ends abruptly, the leftover snapshots will be cleaned up during the scan phase the next time a job is run for the subclient.

For more information about the options not supported with the Use native snapshot to preserve file access time option, refer FAQ.

Last modified: 5/26/2019 7:15:14 AM