When the target response time is not achieved, or when the targeted performance as an application is not achieved regardless of the volume achieving targeted performance, it is necessary for the user to change the target response time.
In addition, when I/O characteristics (read, write, random access, sequential access) are significantly biased, the target value may not be achieved. For this reason, it is necessary to set a target value based on the hardware performance information in accordance with the I/O characteristics.
Furthermore, when using Advanced Copy, the error is caused by mass copying in the performance tuning. For this reason, it is recommended to stop the Automated QoS function during the initial copying of QuickOPC and REC.
Change the target response time of the volume that the application uses when you cannot achieve the performance target as an application. When an actual response time does not reach at the target response time after the change, it is necessary to review the hard composition.
When utilizing the Web Console:
Refer to "Change Target Response Time" in the ETERNUS SF Web Console Guide.
When utilizing the Command Line Interface:
Execute the esfadm volume qosset command.
After changing the target response time, confirm performance information with the performance graph. Refer to "6.5 Confirmation of Performance Information" for information on how to confirm details.
