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Reducing the Number of Backup Jobs in Waiting

In a large environment, when there are many backup jobs running, some of the backup jobs move into Waiting state as a result of resources being in contention for running Auxiliary copy jobs. You can use the available resources efficiently and reduce the number of backup jobs in Waiting state by setting the following configurations.

  • Specify the number of backup jobs that move into Waiting state when Auxiliary Copy jobs are running. When the number of Waiting backup jobs exceeds this threshold, the resource allocation request for the Auxiliary Copy jobs that are running is skipped until the number of backup jobs fall below the threshold limit.

    You can set this limit based on the number of backup jobs running and the number of available resources.

    1. From the CommCell Console ribbon, on the Storage tab, click Media Management.

      The Media Management Configuration dialog box appears.

    2. On the Auxiliary Copy Configuration tab, in the Skip AuxCopy Reservation request when backup jobs in waiting state exceeds box, enter the limit for backup jobs, and then click OK.
  • Increase the time interval before all disk volumes are marked as full.
    1. From the CommCell Console ribbon, on the Storage tab, click Media Management.

      The Media Management Configuration dialog box appears.

    2. On the Service Configuration tab, in the Interval (hours) between marking large disk volumes full box, enter the time interval for backup jobs, and then click OK.
  • For better tape utilization:

    Re-use appendable media for new jobs. Increase the number of days that you can use the media after it is marked as appendable.

    1. From the CommCell Browser, expand Storage Resources > Libraries.
    2. Right-click the appropriate tape library, and then click Properties.

      The Library Properties dialog box appears.

    3. On the Media tab, specify the following settings, and then click OK:
      • Select the Mark Media Appendable and the Use Appendable media check boxes.
      • In the Use Appendable Media within n Day (s) of its last write time box, type the number of days.

    When a job requires a media, use recycled media before any other media.

    1. From the CommCell Browser, expand Storage Resources > Libraries > tape_library > Media By Group.
    2. Right-click the appropriate scratch pool, and then click Properties.

      The Spare Group Properties dialog box appears.

    3. Verify that the Use most reused media first check box is selected, and then click OK.

Last modified: 9/5/2018 8:22:48 PM