Monitoring performance
You can monitor system performance using Performance Monitor. For more information, see the Performance Guide for Virtual Storage Platform Gx00 and Fx00 Models .
You can monitor information on pools and DP-VOLs using Command Control Interface (CCI). For more information, see theCommand Control Interface User and Reference Guide.
The following activities help you to monitor and control performance of the DP-VOL. Collecting monitor information and subsequent tuning can increase throughput and operating rates.
Collecting monitor information. Collecting the following monitor information helps you determine the pool load (including the access frequency, and the access load upon data drives) and DP-VOL load (including the access frequency). You can then use this monitor information to tune the appropriate allocation.
Access frequency of DP-VOL, read hit rates, and write hit rates (using Performance Monitor)
Usage rates of parity groups of pools (using Performance Monitor)
Pool usage (using Device Manager - Storage Navigator).
DP-VOL usage (using Device Manager - Storage Navigator).
Dynamic Tiering performance monitoring of pool storage
Possible tuning actions (without Dynamic Tiering). The following techniques using ShadowImage or Tiered Storage Manager move a DP-VOL.
The DP-VOL is copied using ShadowImage from a pool with an I/O bottleneck. For more information, see ShadowImage User Guide.
When normal volumes exist in the same parity group as the pool-VOL, Tiered Storage Manager can move the normal volume to another parity group that is not shared with a pool-VOL.
ShadowImage copies a DP-VOL with a high I/O load to a pool with a lower access level to adjust the pool load.