z/OS JES2 Initialization and Tuning Guide
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DUPLEX (without backup) on DASD

z/OS JES2 Initialization and Tuning Guide
SA32-0991-00

Define a single checkpoint data set on DASD by specifying the following initialization statement:

    CKPTDEF CKPT1=(DSN=dsname,VOL=volser,INUSE=YES),
            MODE=DUPLEX,DUPLEX=OFF
Parent topic: DUPLEX-mode processing (without backup)

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