On 4/21/2015 3:29 AM, Henn, Karl wrote:
The JES3 to JES2 Migration Considerations (SG24-8083-00) on page 6 reads: "You can also define a JES3 as the primary and JES2 as a secondary subsystem (however running JES2 and JES3 on the same z/OS image is not currently supported, though there are no known problems). If JES3 is running on a system, it must be the primary job entry subsystem. You cannot run JES2 as the primary subsystem and JES3 as a secondary subsystem.".
As the book states, JES3 does not run as a secondary subsystem - only primary. We have LPARs where JES3 runs primary and JES2 runs secondary and other LPARs that are JES3 only and JES2 only. We have found no issues with this setup.
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