ETERNUS SF Express V16.9 / Storage Cruiser V16.9 / AdvancedCopy Manager V16.9 Web Console Guide

9.16.2 Change Configuration of Automated QoS Function

The procedure to change the configuration related to Automated QoS function is as follows:

1. On the global navigation tab, click Storage.
   The registered ETERNUS Disk storage systems are displayed on the Main pane.

2. On the Main pane, click the target ETERNUS Disk storage system.

3. On the Category pane, click Automated Storage Tiering.
   The items of the Category pane change into the items concerning Automated Storage Tiering.

4. On the Category pane, click FTV.

5. On the Action pane, click Modify under FTV.
   The information input screen is displayed.

6. Refer to the following table to enter the necessary information, and then click Modify.

   Item Name	Explanation
   Automated QoS:Enable/Disable	Select whether to change the volume being created subject to adjustments of the Automated QoS. The default setting is "Disable". If select "Enable", Automated QoS:Priority, Target Response Time, or Tune by Quota Share can be specified. If select "Enable" and not specify Automated QoS:Priority or Target Response Time, the device is affected by the adjustments by the Automated QoS function of the other volumes to which those items are specified. If select "Disable", the values set in Automated QoS:Priority, Target Response Time, or Tune by Quota Share are discarded and the QoS performance setting of the ETERNUS Disk storage system is set to Limitless (0). The value of this item is only enabled when using the Automated QoS function.
   Automated QoS:Priority	Simply by specifying "Low", "Middle", or "High" to the volume used by the user, automatic tuning is performed in accordance with the current load. When "Unlimited" has been selected, this is of the topmost priority and of the volumes sharing the same resources, performance is the highest. When "No Set" is selected, there is no priority and therefore adjustments are made to slow down performance in order to prevent the other volumes to which priority levels and target response times have been set from being affected. The value of this item is only enabled when using the Automated QoS function.
   Target Response Time	As an integer from 0 - 10,000, specify the target value (millisecond) of the response time of the volume the user is using. When "0" has been specified, the bandwidth of the volume concerned is unlimited. Although a space may be entered, when a space is entered, a target response time is not configured for that volume. Accordingly, the response time depends on the configured values for the target response times of the other volumes, and may become faster or slower. The target response time is specified for each volume. Furthermore, Automated QoS:Priority cannot be specified when this item has been specified. The value of this item is only enabled when using the Automated QoS function.
   Tune by Quota Share	Select whether to perform coordination between the Automated QoS function and Automated Storage Tiering. Simply by specifying together with Automated QoS:Priority or Target Response Time, automatic tuning of performance is performed through utilization of the Automated QoS function and Automated Storage Tiering. The value of this item is only enabled when using the Automated QoS function. In addition, this can only be specified when all of the following conditions have been satisfied. A value other than "Unlimited" and "No Set" is specified for Automated QoS:Priority. Alternatively, a value other than "0" is specified for Target Response Time. The execution mode of the Tier pool specified for Tier Pool Name is "Auto".