Protect FlexGroup volumes using Snapshot copies


You can create Snapshot policies that automatically manage the creation of Snapshot copies or you can manually create Snapshot copies for FlexGroup volumes. A valid Snapshot copy is created for a FlexGroup volume only after ONTAP can successfully create a Snapshot copy for each constituent of the FlexGroup volume.

About this task

If you have multiple FlexGroup volumes associated with a Snapshot policy, you should ensure that the FlexGroup volumes schedules do not overlap. Starting in ONTAP 9.8, the maximum number of Snapshot copies supported on a FlexGroup volume is 1023.

  1. Create a Snapshot policy or manually create a Snapshot copy:

    If you want to create a…​ Enter this command…​

    Snapshot policy

    volume snapshot policy create


    The schedules that are associated with the Snapshot policy of a FlexGroup volume must have an interval greater than 30 minutes.

    When you create a FlexGroup volume, the default Snapshot policy is applied to the FlexGroup volume.

    Snapshot copy manually

    volume snapshot create


    After you create a Snapshot copy for a FlexGroup volume, you cannot modify the attributes of the Snapshot copy. If you want to modify the attributes, you must delete and then re-create the Snapshot copy.

    Client access to the FlexGroup volume is briefly quiesced when a Snapshot copy is created.

  2. Verify that a valid Snapshot copy is created for the FlexGroup volume: volume snapshot show -volume volume_name -fields state

    cluster1::> volume snapshot show -volume fg -fields state
    vserver volume snapshot               state
    ------- ------ ---------------------- -----
    fg_vs   fg     hourly.2016-08-23_0505 valid
  3. View the Snapshot copies for the constituents of the FlexGroup volume: volume snapshot show -is-constituent true

    cluster1::> volume snapshot show -is-constituent true
    Vserver  Volume   Snapshot                                  Size Total% Used%
    -------- -------- ------------------------------------- -------- ------ -----
    fg_vs    fg__0001
                      hourly.2016-08-23_0505                    72MB     0%   27%
                      hourly.2016-08-23_0505                    72MB     0%   27%
                      hourly.2016-08-23_0505                    72MB     0%   27%
                      hourly.2016-08-23_0505                    72MB     0%   27%