Creating a Traffic Control Policy

Prerequisites

A license file that contains the SmartQoS license information has been imported into the storage system.

Context

Two types of traffic control policies are available:

• Upper-limit traffic control policy: controls the maximum bandwidth and IOPS.
• Lower-limit traffic control policy: controls the minimum bandwidth and IOPS and the maximum latency.

You can configure lower-limit traffic control policies only for LUNs, snapshots, or file systems with high I/O priority, and must not change the priorities of the LUNs, snapshots, or file systems that are working with lower-limit traffic control policies.

Procedure

1. Log in to DeviceManager.
2. Choose Provisioning > Resource Performance Tuning > SmartQoS > Traffic Control.
3. Click Create.

   The Create Traffic Control Policy Wizard dialog box is displayed.

4. In the Set Name dialog box, specify Name and Description for the traffic control policy to be created, and click Next.
5. In the displayed Set Control Objective dialog box, set the required parameters.
   1. In Template, select a template.
   2. In Control Type, select the I/O characteristic that you want the policy to control.

      The possible I/O characteristics include Read I/O, Write I/O, and Read/Write I/O.

   3. In Control Policy, select the control policy type that you want to set.

      The possible control policy types include Upper limit control and Lower limit control.

   4. In the Control Objective area, set a performance goal that you want this policy to achieve.

      The possible performance goals include IOPS, Bandwidth, and Latency.

      • When Control Policy is Upper limit control, you can set the upper limit of Bandwidth and IOPS.
      • When Control Policy is Lower limit control, you can set the lower limit of Bandwidth and IOPS and the upper limit of Latency.

        It is recommended that the lower limit control settings match service models and load pressure. Larger bandwidth and IOPS mean more severe suppression on the performance of objects not configured with lower limit control, even affecting their host, HyperMetro, and HyperReplication services.

   Bandwidth and IOPS control the total bandwidth and IOPS of LUNs, snapshots, or file systems involved in the policy. For example, if the configured maximum IOPS is 1000 and this policy contains 10 LUNs, the total IOPS of the 10 LUNs cannot exceed 1000. Similarly, if the configured minimum IOPS is 100 and the policy contains 10 LUNs, the total IOPS of the 10 LUNs is greater than or equal to 100.

   5. Click Next.

6. In the displayed Set Trigger Policy dialog box, set the required parameters.
   1. In the Start Date text box, set a date from which the traffic control policy starts to run.
   2. In the Execution Period area, set a frequency at which the traffic control policy runs.

      The possible frequencies are:

      • One-off: The traffic control policy runs only on the day specified in Start Date.
      • Weekly: The traffic control policy runs on the day in each week following the day specified in Start Date.
   3. In the Execution Time area, set the time when the traffic control policy starts to run and the hours that it lasts for.
   4. Click Next.

7. In the displayed Select Control Object dialog box, select the control objects to which the control policy will be applied.
   1. Select LUN, Snapshot, or File System from Resource Type.
   2. (Optional) In the Available LUNs area, select the LUNs that you want the policy to control and click to add them to Selected LUNs.
   3. (Optional) In the Available Snapshots area, select the snapshots that you want the policy to control and click to add them to Selected Snapshots.
   4. (Optional) In the Available File Systems area, select the file systems that you want the policy to control and click to add them to Selected File Systems.
   5. Click Next.

8. In the displayed Summary dialog box, check all the attributes that you want to set for the traffic control policy.
   • If all attributes are correct, click Finish.

     The Execution Result dialog box is displayed, indicating that the operation succeeded. Click Close.

     The security alert dialog box is displayed, indicating that the traffic control policy will be activated. Click OK.

     The Execution Result dialog box is displayed, indicating that the operation succeeded. Click Close.

   • If an attribute is wrong, click Previous to reset it.