The STOP command causes an orderly shutdown of DFSMShsm. An orderly shutdown occurs when DFSMShsm ends each attached subtask and ends all started secondary address spaces. Because many DFSMShsm commands and automatic functions can run for a long time, DFSMShsm periodically checks whether you issued a STOP command. This allows DFSMShsm to shut down as soon as possible. After DFSMShsm detaches all subtasks and all secondary address spaces end, DFSMShsm issues a message indicating that shutdown is complete. DFSMShsm then returns control to the system. The STOP command should be entered only once.
If the DUMP parameter is specified with the STOP command, DFSMShsm ends processing immediately for all primary and secondary address spaces, and there is no orderly shutdown. All secondary address spaces currently processing are canceled immediately.
When the STOP command is issued without any parameters in a sysplex environment, DFSMShsm assumes that no promotion is desired on that host.
Another way to shut down DFSMShsm is to use the MVS™ STOP command.