z/OS MVS Using the Subsystem Interface
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Starting Your Subsystem With the START Command

z/OS MVS Using the Subsystem Interface
SA38-0679-00

You can initialize your subsystem with the START command and run under either a job entry subsystem (JES) or the MSTR subsystem.

See Subsystem Identification Block (SSIB) for more information on started tasks.

MVS™ uses one of the following naming conventions to identify the name of the subsystem being started:
  • START CAW — MVS interprets CAW as the subsystem name
  • START CAW.CAW1 — MVS interprets CAW1 as the subsystem name
  • START CAW,JOBNAME=CAW2 — MVS interprets CAW2 as the subsystem name.

In each case, MVS looks for the matching subsystem name that was previously defined to MVS.

If you want to start multiple instances of a specific subsystem using different names, you can, for example, define the following subsystems:
  • CAW — the first instance of the CAW subsystem
  • CAW1 — the second instance of the CAW subsystem
  • CAW2 — the third instance of the CAW subsystem
and then specify the following with the START command:
  • START CAW,JOBNAME=CAW
  • START CAW,JOBNAME=CAW1
  • START CAW,JOBNAME=CAW2

For more information about started tasks, see z/OS MVS JCL Reference.

Parent topic: Using the START Command

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