Guidelines for maximizing host server I/O performance
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 Hitachi Command Suite User 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 Changing system options.
About selecting a copy pace while creating SI pairs, see Creating SI pairs.
About selecting a copy pace while splitting SI pairs, see Splitting SI pairs.
About selecting a copy pace while resynchronizing SI pairs, see Resynchronizing or restoring SI pairs.