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DUPLEX-mode processing (with backup) z/OS JES2 Initialization and Tuning Guide SA32-0991-00 |
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JES2 can operate its checkpoint configuration in DUPLEX mode if you have defined two checkpoint data sets, a primary and a duplex. All members of your JES2 configuration (whether a single member operating in a single-member environment or multiple members operating as part of a multi-access spool configuration), should, if possible, operate with DUPLEX=ON on the CKPTDEF statement. This provides the greatest protection from checkpoint error. |
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