Before you begin: All storage classes defined by your installation are automatically assigned the default PAV value of Nopreference, which means that all PAV and non-PAV volumes are treated equally. To force volume selection to differentiate between them, you need to modify the PAV option in the storage class.
The following list comprises the planning steps that you must complete before you can successfully implement the PAV option in the storage class:
Example: DS QPAVS,devnum
For information about using the DEVSERV command, see z/OS MVS System Commands.
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Data sets that require high performance could include frequently accessed data sets and critical data sets. For example, if certain jobs are taking too long because data sets used by these jobs are on non-PAV volumes, you might allocate those data sets on PAV volumes to determine if that improves their performance.
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Now you are ready to implement the SMS PAV option in the storage class.