Guidelines for maximizing host server I/O performance (VSP Gx00 models and VSP Fx00 models)

Creating, splitting, and resynchronizing pairs can affect host server I/O performance.

Use the following guidelines to minimize the impact of pair operations on host server I/O performance:

• If you are creating SI pairs, try one or both of the following:

• Create the pair when the I/O load is light.

For more information about checking I/O performance-related information, see the Command Suite User Guide or the System Administrator Guide.

• Limit the number of pairs that you simultaneously create.

• If you are creating, splitting, or resynchronizing SI pairs, select a slower copy pace. You can enable the system option for copy pace or you can select a specific copy pace while performing the task.

For more information:

• About enabling the system option for copy pace, see Setting HOST I/O Performance options (VSP Gx00 models and VSP Fx00 models).

• About selecting a copy pace while creating SI pairs, see Creating ShadowImage pairs.

• About selecting a copy pace while splitting SI pairs, see Splitting ShadowImage pairs.

• About selecting a copy pace while resynchronizing SI pairs, see Resynchronizing or restoring ShadowImage pairs.