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- R (Restart, Checkpoints Allowed)
- Indicates that the operator can perform automatic step restart
if the job step fails.
RD=R does not suppress checkpoint restarts: - If the processing program executed in a job step does not include
a CHKPT macro instruction, RD=R allows the system to restart execution
at the beginning of the abnormally terminated step.
- If the program includes a CHKPT macro instruction, RD=R allows
the system to restart execution at the beginning of the step, if the
step abnormally terminates before the CHKPT macro instruction is executed.
- If the step abnormally terminates after the CHKPT macro instruction
is executed, only checkpoint restart can occur. If you cancel the
affects of the CHKPT macro instruction before the system performs
a checkpoint restart, the request for automatic step restart is again
in effect.
- RNC (Restart, No Checkpoints)
- Indicates that the operator can perform automatic step restart
if the job step fails.
RD=RNC suppresses automatic and deferred
checkpoint restarts. It suppresses: - Any CHKPT macro instruction in the processing program: That is,
the operator cannot perform an automatic checkpoint restart, and the
system is not to perform a deferred checkpoint restart if the job
is resubmitted.
- The DD statement CHKPT parameter.
- The checkpoint at end-of-volume (EOV) facility.
- NR (No Automatic Restart, Checkpoints Allowed)
- Indicates that the operator cannot perform
automatic step restart if the job fails.
RD=NR suppresses automatic
checkpoint restart but permits deferred checkpoint restarts. It permits: - A CHKPT macro instruction to establish a checkpoint.
- The job to be resubmitted for restart at the checkpoint. On the
JOB statement when resubmitting the job, specify the checkpoint in
the RESTART parameter.
If you code RD=NR and the system fails, RD=NR does not
prevent the job from restarting.
- NC (No Automatic Restart, No Checkpoints)
- Indicates that the operator cannot perform
automatic step restart if the job step fails.
RD=NC suppresses
automatic and deferred checkpoint restarts. It suppresses: - Any CHKPT macro instruction in the processing program.
- The DD statement CHKPT parameter.
- The checkpoint at EOV facility.
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