z/OS DFSMSdfp Checkpoint/Restart
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Shared Resources

z/OS DFSMSdfp Checkpoint/Restart
SC23-6862-00

Checkpoint/restart is supported for the local shared resources (LSR) feature, including use with Hiperspace™ buffers, but repositioning is not allowed. Also, checkpoint is not allowed and cannot be taken when the global shared resources feature is used.

For automatic checkpoint/restart, deleting a data set open at the time the checkpoint was taken or deallocating a SYSOUT data set to the job entry subsystem makes the step ineligible for restart until the next checkpoint is taken.

For automatic step restart, any of the following makes the step ineligible for restart:
  • KEEP, CATLG, or UNCATLG a NEW JCL-specified data set
  • DELETE JCL-specified data set whose initial status upon entry to the step was OLD
  • DELETE an OLD dynamically allocated data set that had volumes specified when allocated
  • UNCATLG JCL-specified data set whose initial status upon entry to the step was OLD and did not have volumes specified.

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