Stopping RTCS

RTCS provides non-stop services to client applications, which requires that all critical control blocks be anchored in the RTCS address space. If the RTCS subsystem is taken down, its services will not be available and tasks or address spaces using RTCS will abnormally terminate.

BMC does not recommend that the RTCS subsystem address space be shut down for any reason. Nevertheless, installations have found it desirable to shut RTCS down in order to release the dynamic allocation on the system registry VSAM linear data set (LDS) so that it could be backed up or reallocated, or to change the DSNAMEs of the OSZLINK or OSZRTCS production libraries defined in the OSZINIT started task PROC.

To stop RTCS when no client products are running

If no client product address spaces are running, use the standard STOP command to stop RTCS:stoP cscbName

cscbName is the name of the Command Scheduling Control Block (CSCB) that was built by z/OS. For the RTCS subsystem address space, the CSCB name is the RTCS z/OS Subsystem ID (SSID). For detailed information about the cscbName variable, see RTCS-commands.

To stop RTCS when client products are running

If any client product address space is using RTCS services, the standard STOP command will not stop the RTCS subsystem address space. The STOP command first checks for any active client product address spaces, and if any are found, they are listed by using message OSZ106E and the STOP command is ignored.

  1. Stop all MainView address spaces, including PAS, CAS, and TAS (Alternate Access) address spaces.If a MainView address space fails to shutdown, see the product’s documentation for additional information.

    Note

    Failure to stop all of these address spaces prior to stopping RTCS can result in additional problems.

  2. Have all MainView TSO users logoff.If you cannot determine which TSO users have used MainView, stop all TSO users.
  3. Issue a STOP command to RTCS, as described in To stop RTCS when no client products are running.

  4. If RTCS does not respond with further OSZ0106E messages and does not terminate in a timely manner, you might have to use the FORCE command to stop RTCS.

    Note

    See the warning associated with using the FORCE command in the z/OS V1R12.0 MVS System Commands book.

    If a FORCE is deemed necessary issue the following commands (for detailed information about the cscbName variable, see RTCS-commands):

    C cscbName

    FORCE cscbName,ARM

    RTCS terminates.

Related topic

RTCS-administration



 

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