Configure a hierarchical consistency group

Contributors

If your application workload spans more than 80 volumes, ONTAP allows your to create a hierarchical consistency group. Hierarchical consistency groups have a parent that can include up to five individual consistency groups. Hierarchical consistency groups can support different local Snapshot policies across consistency groups or individual volumes. If you use a remote SM-BC policy, that will apply for the entire consistency group.

For object limits on consistency groups, see Object limits for consistency groups.

Create a hierarchical consistency group with new volumes

Steps
  1. Select Storage > Consistency groups.

  2. Select +Add. then Using New LUNs.

  3. Name the consistency group. Designate the number of LUNs and capacity per LUN.

  4. Select the host operating system and LUN format. Enter the host initiator information.

  5. To configure protection policies, add a child consistency group, or show more options about host initiators, select More options.

  6. To add a child consistency group, select +Add child consistency group.

  7. Select the performance level, the number of LUNs, and capacity per LUN. Designate the host operating system, LUN format, and select a new or existing host initiator group.

  8. Optional: select a local snapshot policy.

  9. Repeat for up to five child consistency groups.

  10. Select Save.

  11. Confirm your consistency group has been created by returning to the main consistency group menu where it will appear once the ONTAP job completes. If you set a protection policy, look under the appropriate policy, remote or local, which should display a green shield with a checkmark in it.

Create a hierarchical consistency group with existing volumes

Steps
  1. Select Storage > Consistency groups.

  2. Select +Add. then Using existing volumes.

  3. Select the storage VM.

  4. Select the existing volumes to include. Only volumes that are not already part of a consistency group will be available for selection.

  5. To add a child consistency group, select +Add Child Consistency Group. Create the necessary consistency groups, which will be named automatically.

  6. Assign existing volumes to each consistency group.

  7. Optional: select a local Snapshot policy.

  8. Repeat for up to five child consistency groups.

  9. Select Save.

  10. Confirm your consistency group has been created by returning to the main consistency group menu where it will appear once the ONTAP job completes. If you have chosen a protection policy, confirm it was properly set by selecting your consistency group from the menu. If you set a protection policy, look under the appropriate policy, remote or local, which should display a green shield with a checkmark in it.