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z/OS MVS JCL Reference
Note: This parameter is ignored for a started task.
Use the RD (restart definition) parameter to:
The system can perform automatic restart only if all of the following are true:
The system can perform automatic step restart for a job running during a system failure as long as the job has a job journal. A job journal is a sequential data set that contains job-related control blocks needed for restart.
If you use checkpoint restart or restart a job step, you need to save the journal or the system cannot automatically restart the job if it fails or if there is a system restart. If you use the automatic restart manager (ARM) to restart a job, you do not need to save the journal because ARM does not use the job journal when restarting jobs.
For JES2, specify a job journal by one of the following:
For JES3, specify a job journal by one of the following:
For detailed information on deferred checkpoint restart, see z/OS DFSMSdfp Checkpoint/Restart.
Considerations for an APPC scheduling environment
The RD parameter has no function in an APPC scheduling environment. If you code RD, the system will check it for syntax and ignore it.
Copyright IBM Corporation 1990, 2014