As a best practice, attach a QoS policy that uses the bandwidth metric to storage volumes providing large I/O services, and attach a QoS policy that uses the IOPS metric to storage volumes providing small I/O services. A storage volume supports only one QoS policy, and a QoS policy can be attached to multiple storage volumes. A storage volume supports only QoS policies in the same disk pool as itself. You cannot attach an abnormal QoS policy to storage volumes.
From the navigation pane, select ONEStor > Block Storage.
Select Volume Management > Volumes.
Select a node pool, a disk pool, and a storage pool. Perform either of the following tasks:
To attach a QoS policy to one storage volume, click More in the Actions column for that storage volume, select Attach QoS Policy, select a QoS policy, and then click OK.