Warm start processing considerations

You must consider the following when performing a JES2 warm start:

Spool volumes

No new spool volumes can be added during a warm start of JES2; they must be added with the start spool ($S SPOOL) command. A volume may be removed using the drain spool ($P SPOOL) or halt spool ($Z SPOOL) operator command.

Reestablishing the previous environment

It is recommended that you specify the REQ initialization option when performing a warm start. This option gives you the chance to reestablish the processing environment that existed before JES2 terminated (by restoring the VTAM® environment, restoring the TCAS environment, and/or modifying the MVS™ environment) before starting JES2 processing.

Job status

Any jobs being read into the system when it failed must be resubmitted by the originator of the job. Those jobs awaiting execution, and completed jobs awaiting output processing, are unaffected by the system failure. Jobs active on printers or punches are returned to the hardcopy queue, and will start at the latest checkpoint when selected.

JES2 examines jobs interrupted during execution to determine which are eligible for restart. (For a discussion of job restart eligibility, see z/OS JES2 Initialization and Tuning Reference, SA32-0992.) The following message is displayed for each eligible job:

*id IEF225D SHOULD jobname.stepname.procedure [ checkid ] RESTART

If you reply:

YES: The job is restarted.
NO: The job is queued for output or queued for re-execution (if the RESTART option was specified on the job's /*JOBPARM statement).
HOLD: The job is placed in hold status, to be restarted when it is released.

Once you have determined that the system is ready to resume processing, enter the $S command (unless NOREQ was specified).