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Restarting Programs from a Checkpoint Using BIM-EPIC's JCL Features
7-54 User Reference
Using BIM-EPIC's JCL Features
Restarting Programs from a Checkpoint
To prepare to restart programs from a checkpoint:
Close all output datasets with the TSIDMNT CLOSE function.
Use the console log to determine which input and output tape volumes have been used
and which checkpoints have been taken.
All datasets must be cataloged. Start Track 1 datasets cannot be used with checkpoint/restart.
You must specify the SYS number in the catalog entry for disk datasets. You can also specify
it for tape datasets.
To prepare the restart job:
1. Ensure that you use the same job name, supervisor, and partition.
2. Execute the TSIDASS RSTRT function in the step just prior to the VSE RESTRT
command. See "Pre-Open Processing" for details.
3. Define each controlled dataset in the TSIDASS RSTRT step. Remember that the output
datasets are now the current versions in the DSN Catalog, so submit all output RSTRT
statements first, input statements last.
For tape, specify the volume sequence number on the label, if you restart with volume 2 or
later. If you are processing a multi-dataset group, BIM-EPIC positions the tape automatically.
Inhibit LUB allocation.
For disk, supply the EXT parameter reflecting the last extent opened.
4. Follow the TSIDASS step with a VSE ASSGN statement for the checkpoint dataset. Use
the logical unit number that was used when the dataset was opened in the previous execution.
See the EP039 and EP053 messages to find these numbers.
5. The SYS number used for the checkpoint dataset must be assigned with a VSE ASSGN
statement if checkpoints are not embedded in the output dataset.
6. Execute the restart job.
Description
DSN Catalog
JCL Requirements
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