Storage subsystem use can affect overall system performance, and
it is therefore necessary to determine how adding XRC activity might
affect the primary storage subsystem.
Perform the following steps to determine the effect of adding XRC
activity to your primary storage subsystem.
- Make note of the write rate for the volumes that you want to copy
on each primary site storage control.
- Add this rate, as if it was all fast write, to the total storage
subsystem use.
- Decide if this impact on the storage subsystem allows applications
to achieve acceptable disk I/O performance. If it does not, you may
need to redistribute volumes among storage controls or add an additional
primary site storage control.