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Coding a Checkpoint z/OS DFSMSdfp Checkpoint/Restart SC23-6862-00 |
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The CHKPT macro instruction is coded in your program. When the CHKPT macro executes, job step information (about your program, virtual storage data areas, data set position, and supervisor control) is written as a checkpoint entry in a checkpoint data set. The point at which this information is saved becomes a checkpoint from which a restart may be performed. After the checkpoint entry is written, control returns to your program at the instruction following the CHKPT macro. This chapter defines a checkpoint and explains how to establish
checkpoints to restart job steps. Table 1 contains
directive information about this chapter's contents:
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