Enabling QoSSIOC automation

You can enable QoSSIOC automation and customize virtual machine disk (VMDK) performance levels using the NetApp Element Management extension point.

Before you begin

You have configured the QoSSIOC service settings on the QoSSIOC Settings page from the NetApp Element Configuration extension point.

About this task

QoSSIOC is available only with standard datastores. It does not work with virtual volumes (VVols). QoSSIOC adjusts QoS values on standard Element volumes when virtual machine events occur, such as power on or power off events, guest restarts or shutdown, or reconfiguration activity.

Attention: If you are using QoS policies, do not enable QoSSIOC. QoSSIOC will override and adjust QoS values for any volume QoS settings regardless of policy.


  1. Select NetApp Element Management > Management.
    Note: If two or more clusters are added, ensure that the cluster you intend to use for the task is selected in the navigation bar.
  2. Click the status button in the QoSSIOC Automation column for the selected datastore.
    Tip: Ensure that the datastore does not have QoSSIOC integration enabled on another vCenter to prevent unexpected changes in QoS.
  3. Select Enable QoS & SIOC.
  4. Configure the Burst Factor.
    Note: The burst factor is a multiple of the IOPS limit (SIOC) setting for the VMDK. If you change the default, make sure to use a burst factor value that will not exceed the maximum burst limit for a NetApp Element software-based volume when the burst factor value is multiplied by the IOPS limit for any VMDK.
  5. Optional: Select Override Default QoS and configure the settings.
    Note: If the Override Default QoS setting is disabled for the datastore, the Shares and Limit IOPS values are automatically set based on the default SIOC settings of each VM.
    Tip: Do not customize the SIOC share limit without also customizing the SIOC IOPS limit.
    Tip: By default, the maximum SIOC disk shares are set to Unlimited. In a large VM environment such as VDI, this can lead to overcommitting maximum IOPS on the cluster. When you enable QoSSIOC, always check the Override Default QoS and set the Limit IOPS option to something reasonable.
  6. Click OK.
    Note: When you enable the QoSSIOC Automation for a datastore, the button changes from Disabled to Enabled.