By distributing your data sets, you can prevent I/O requests
from being queued in z/OS®.
Procedure
To distribute I/O operations:
-
If you do not have parallel access volumes, allocate
frequently used data sets or partitions across your available disk
volumes so that I/O operations are distributed.
Even with
RAID devices, in which the data set is spread across the physical
disks in an array, data should be accessed at the same time on separate
logical volumes to reduce the chance of an I/O request being queued
in z/OS.
- Consider isolating data sets that have characteristics
that do not complement other data sets.