138 IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
workload of these open systems logical disks, or the S/390 CKD volumes you are concerned
about to the other side of the cluster, so that you can concentrate cache-friendly I/O workload
to either cluster, this would improve the situation. If you cannot do this, or if the condition has
not improved after moving, then balancing I/O distribution on more Ranks is worth
considering. This will optimize the staging and destaging operation.
The approaches for using other tool’s data in conjunction with the IBM TotalStorage
Productivity Center for Disk, as described in this chapter, do not cover all the possible
situations you will encounter. But if you basically understand how to ...