This exit allows you to provide an exit routine from the JES2 main task that selects the spool volumes from which a job should allocate additional spool space when JES2 determines that additional spool volumes should be added to the available volumes for the job.

Before implementing this exit, you must determine if your installation uses spool partitioning. Your installation uses spool partitioning if FENCE=ACTIVE=YES is specified on the SPOOLDEF initialization statement.