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.