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QoS policy group assignment restrictions

Contributors netapp-aherbin
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Beginning with ONTAP 9.18.1, you can use nested QoS policies, which allow assigning policy groups to both the containing object, such as an SVM, and its child object, such as a volume. In a multi-tenant environment, nested QoS policies enable administrators to subdivide the QoS limits on SVMs among the volumes and qtrees within the SVM, and to provide the ability to balance storage resources across computing environments while also enabling prioritization of mission-critical workloads.

Nested QoS policies are supported for the following object pairs:

  • SVMs and FlexVol or FlexGroup volumes contained by the SVM.

  • FlexVol or FlexGroup volumes and qtrees within the volumes.

For nested QoS policies, the most restrictive applicable policy is used.

The following table lists the restrictions.

If you assign the…​ Then you cannot assign to a policy group…​

SVM to a policy group

Any storage objects contained by the SVM.

Note If you are running ONTAP 9.18.1, FlexVol and FlexGroup volumes contained by SVMs can be assigned to a policy group.

Volume to a policy group

The SVM containing the volume or any child LUNs.

Note If you are running ONTAP 9.18.1 and later, the SVM containing the volume can be assigned to a policy group. Additionally, qtrees in FlexVol or FlexGroup volumes can be assigned.

LUN to a policy group

The volume or SVM containing the LUNs

File to a policy group

The volume or SVM containing the file