In relation to the above volumes, configure the target response time from the following perspectives.
Performance requirements of business application
Current performance value, interpreted from the performance graph
Determine the target response time required for each volume from the performance conditions for business applications A, B, C and D.
The following table settings are explained in this example.
Tier Pool Name | FTV Name | Target Response Time | Coordination with Automated Storage Tiering |
|---|---|---|---|
TrPool_1 | FTV#0 | 10 msec | On |
FTV#1 | 20 msec | Off | |
TrPool_2 | FTV#2 | - | Off |
FTV#3 | 100 msec | Off |
The I/O performance of other volumes sharing resources (Tier pool, CM, CA/CM port, and FC switch port) with these volumes is controlled in accordance with the performance adjustment of volumes that are set with the target response time. In this example, since FTV#3 shares the Tier pool with FTV#2, the I/O performance is also controlled for FTV#2 depending on the settings of the Automated QoS function.
The decided target response times are configured to the volumes and performance adjustments are conducted, and until the user determines that I/O performance sufficient for the operation of business applications is reached, the configuration of target response times are repeated.
Point
When linking with Automated Storage Tiering is set to enable and the target cannot be achieved with a bandwidth adjustment of the Automated QoS function, change the Automated Storage Tiering capacity allocation ratio, and adjust the I/O performance.
Example of the command executed in the Windows environment is shown below.
FTV#0 that exists in the Tier pool "TrPool_1" is set as the target for Automated QoS adjustments, the target response time is set to10 milliseconds, and linking with Automated Storage Tiering is enabled.
>$INS_DIR\Common\bin\esfadm volume qosset -ipaddr 192.0.2.10 -volume 0 -qosfunc enable -resptime 10 -quotatune on
($INS_DIR is the "Program directory" when ETERNUS SF Manager has been installed.)
