If the Enterprise Storage Server® (ESS) PAV option is enabled, you can use the DFSMS
storage class parallel access volume (PAV) option to ensure that data
sets that require high performance are only allocated to volumes on
which the ESS PAV option is enabled.
The DFSMS PAV capability option includes the following settings
with these results:
- Required
- Only volumes with the PAV feature enabled are selected.
- Preferred
- Volumes with the PAV feature enabled are eligible to be primary
volumes. Volumes without the PAV feature enabled are only eligible
to be secondary volumes.
- Standard
- Volumes without the PAV feature enabled are preferred over volumes
with the PAV feature enabled and are eligible to be primary volumes.
Volumes with the PAV feature enabled are only eligible to be secondary
volumes.
- Nopreference
- Whether the PAV feature is enabled or not for a volume is ignored
and has no effect on the volume selection process. This is the default
value for this option.