Modifying a SmartQoS Policy

Procedure

1. Choose Services > Resource Tuning > SmartQoS.
2. Click More on the right of the SmartQoS policy and choose Modify.

   The Modify SmartQoS Policy page is displayed.

   Alternatively, click the name of the desired SmartQoS policy. In the upper right corner of the page that is displayed, select Modify from the Operation drop-down list.

3. Change the Name of the SmartQoS policy.
4. Modify the Description of the SmartQoS policy.
5. Modify the control objective.

   You can set Bandwidth (MB/s), Normalized IOPS (8 KB), and Normalized Latency (8 KB).

   • You can set either or both of Bandwidth (MB/s) and Normalized IOPS (8 KB). You are advised to set only Bandwidth (MB/s) for bandwidth-intensive services and only Normalized IOPS (8 KB) for IOPS-intensive services. If you cannot determine the service type or the service type changes frequently, you can set both indicators and the system will control the traffic using the indicator with a smaller value.
   • You can query the conversion between the standard IOPS (8 KB) model and real I/O model in the conversion table on DeviceManager.
   Table 3-2 describes related parameters.

   Table 3-2 Control objective parameters

   Parameter	Description
   Bandwidth (MB/s)
   Min	Minimum bandwidth. NOTE: This parameter is available only when Type is set to Common.
   Max	Maximum bandwidth.
   Burst	Maximum burst bandwidth. This parameter can be set only after the maximum bandwidth is specified. Its value must be greater than that of Max.
   Normalized IOPS (8 KB)
   Min	Minimum IOPS. NOTE: This parameter is available only when Type is set to Common.
   Max	Maximum IOPS.
   Burst	Maximum burst IOPS. This parameter can be set only after the maximum IOPS is specified. Its value must be greater than that of Max.
   Max. Burst Duration (s)	Maximum burst duration. This parameter can be set only after the maximum burst bandwidth or burst IOPS is specified.
   Normalized Latency (8 KB)
   Max	Maximum latency of the local storage system. NOTE: This parameter is available only when Type is set to Common. In HyperMetro and remote replication scenarios, the end-to-end latency includes the local storage system latency, link latency, and remote storage system latency. The link latency depends on the link length and cannot be guaranteed by the lower limit guarantee function. To ensure that the latency is normal in HyperMetro and synchronous replication scenarios, configure the same SmartQoS policy for the corresponding objects on the local and remote storage systems and ensure that the parameters are consistent.

6. Click Advanced and set the triggering policy for the SmartQoS policy.
   1. In the Execution Period area, set a frequency at which the SmartQoS policy is executed.

      The possible frequencies are:

      • One-off: The SmartQoS policy runs only on the day specified in Start Date.
      • Weekly: The SmartQoS policy runs on the specified days weekly following the day specified in Start Date.
      • Daily: The SmartQoS policy runs daily following the day specified in Start Date.
   2. Specify Start Date from which the SmartQoS policy starts to run.
   3. Specify Start Time when the SmartQoS policy starts to run.
   4. Specify Duration for the SmartQoS policy to last for.

7. Click OK.