CKPTDEF - JES2 Checkpoint Definition

The CKPTDEF statement defines the JES2 checkpoint data sets, their respective backup data sets, and the mode of the checkpoint configuration.

Follow these coding rules when specifying the checkpoint data sets:
  • Specify CKPT1= and CKPT2= or both, and include INUSE=Yes along with one of the following:
    • DSName= and VOLume= (if the checkpoint resides on DASD)
    • STRname= (if the checkpoint resides on a coupling facility structure)
  • Naming restrictions for the DSName= and VOLume= specifications (if the checkpoint is on DASD) and the STRname= specification (if the checkpoint is on coupling facility) are as follows:
    • CKPTn (STRname) cannot be the same as NEWCKPTn (STRname).
    • CKPT1 (DSName and VOLser or STRname) cannot be the same as CKPT2 or NEWCKPT2 (DSName and VOLser or STRname).
    • NEWCKPT1 (DSName and VOLser or STRname) ) cannot be the same as NEWCKPT2 (DSName and VOLser or STRname) or CKPT2 (DSName and VOLser or STRname).