Parameters on SYSCKEOV DD statements
When creating a checkpoint data set:
- Code a SPACE parameter, but do not request secondary space. The primary space request must be large enough to hold all checkpoints; if not, the job abnormally terminates.
- Do not code the RLSE subparameter of the SPACE parameter.
- Code the CONTIG subparameter of the SPACE parameter to request contiguous space. The system otherwise provides additional primary space using extents.
- The SYSCKEOV DD statement must define a BSAM data set, but cannot define a partitioned data set extended (PDSE).
- Code DISP=MOD to reduce loss of checkpoint data in case of a system failure during checkpointing.
Other parameters:
- Do not code on the SYSCKEOV DD statement the following:
- CHKPT=EOV parameter.
- DCB parameter. All DCB information is provided by the checkpoint at EOV facility.
- DEFER subparameter of the UNIT parameter.
- If you code the LABEL parameter, you must specify LABEL=(,SL) for IBM® standard labels.
- If the SYSCKEOV data set resides on a direct access storage device, that device cannot be shared with another processor.