Manage QoS policies

You can configure a QoS policy and attach the policy to a block device to limit the IOPS or bandwidth that the block device can use, preventing the block device from occupying too many resources.

Restrictions and guidelines

• Configure QoS policy parameters based on service needs to improve the overall storage service quality.

• A QoS policy in abnormal state cannot be edited.

• To delete a QoS policy, you must first detach the policy from all block devices.

Create a QoS policy

1. On the top navigation bar, click Storage, and then select Block Storage > QoS Policy Management from the left navigation pane.

2. Click Add.

3. Configure the parameters as described in "Parameters."

4. Click OK.

View QoS policies

On the top navigation bar, click Storage, and then select Block Storage > QoS Policy Management from the left navigation pane.

Edit a QoS policy

1. On the top navigation bar, click Storage, and then select Block Storage > QoS Policy Management from the left navigation pane.

2. Click the  icon in the Actions column for the target QoS policy.

3. Configure the parameters as described in "Parameters."

4. Click OK.

Delete a QoS policy

1. On the top navigation bar, click Storage, and then select Block Storage > QoS Policy Management from the left navigation pane.

2. Click the  icon in the Actions column for the target QoS policy.

3. In the dialog box that opens, click OK.

Restore a QoS policy

Perform this task to restore a QoS policy in abnormal state.

To restore a QoS policy:

1. On the top navigation bar, click Storage, and then select Block Storage > QoS Policy Management from the left navigation pane.

2. Click the  icon in the Actions column for the target QoS policy.

3. In the dialog box that opens, click OK.

Detach a QoS policy from block devices

1. On the top navigation bar, click Storage, and then select Block Storage > QoS Policy Management from the left navigation pane.

2. Click the  icon in the Actions column for the target QoS policy.

3. In the dialog box that opens, click OK.

Parameters

• Creating/editing a QoS policy:

• QoS Policy Name: Specify a name for the QoS policy.

• IOPS Upper Threshold/Bandwidth Upper Threshold: Specify the IOPS or bandwidth upper limit for a block device or each GB of a block device.

• Viewing QoS policies:

• Name: QoS policy name.

• Upper Threshold: IOPS or bandwidth upper limit in the QoS policy.

• Block Devices: Number of storage volumes associated with the QoS policy.