Modifying a SmartQoS Policy

Procedure

1. Choose Resources > Tuning > SmartQoS > Directory.
2. Select a desired account from the Account drop-down list in the upper left corner.
3. Click More on the right of a desired QoS policy and select Modify.

   The Modify QoS Policy page is displayed.

4. Set the QoS policy parameters, including the fixed bandwidth upper limit and OPS upper limit.
   1. Set the bandwidth upper limit. That is, the maximum amount of I/O data that can be processed on a single directory per second. The unit is MB/s.
   2. Set the OPS upper limit. That is, the maximum number of operations that can be performed on a single directory per second.
   3. When the object service is enabled in the storage system, you can choose whether to enable Object Service Read/Write Control to control the upper limits of read and write OPS and bandwidth of the object service. After this function is enabled, you need to set the QoS policy parameters of the object service.

      Table 1 describes related parameters.

      Table 1 Object service QoS policy parameters

      Parameter	Description
      Read Bandwidth Upper Limit	Maximum read bandwidth on a single directory of the object service. That is, the maximum amount of data in the read requests of the object service processed by a single directory per second. The unit is MB/s.
      Write Bandwidth Upper Limit	Maximum write bandwidth on a single directory of the object service. That is, the maximum amount of data in the write requests of the object service processed by a single directory per second. The unit is MB/s.
      Read OPS Upper Limit	Read OPS upper limit of a single directory of the object service. That is, the maximum number of read requests of the object service that can be processed by a single directory per second.
      Write OPS Upper Limit	Write OPS upper limit of a single directory of the object service. That is, the maximum number of write requests of the object service that can be processed by a single directory per second.

      

      If the sum of Read OPS Upper Limit and Write OPS Upper Limit exceeds OPS Upper Limit, OPS Upper Limit takes effect. If the sum of Read Bandwidth Upper Limit and Write Bandwidth Upper Limit exceeds Bandwidth Upper Limit, Bandwidth Upper Limit takes effect.

5. Click OK.