Stopping local processors *RETURN
Function
Before you remove a local main for maintenance or other reasons, allow jobs currently running to complete normally. Enter an * F, V,main,OFF command for the local main to prevent JES3 from scheduling any further jobs on the processor.
After all jobs on the local main have completed processing, issue the *RETURN command to end JES3.
Then issue the HALT EOD command on the local main to ensure that important statistics and data records in storage are not permanently lost. See z/OS MVS System Commands for information about stopping MVS™.