Advanced Topics › Product Termination Considerations › How You Shut Down the System in a VCF Environment

How You Shut Down the System in a VCF Environment

If you enter a SHUTDOWN command in a VCF environment, then CA MIM responds in different ways depending on the system that is being shut down. The communication method used (CTCONLY, CTCDASD, or XCF) also affects the response of CA MIM.

If a client system is shut down in a CTCONLY or XCF environment, then follow the procedures outlined in Local Shutdown Processing in this chapter. If the master system is shut down, then CA MIM automatically migrates to the next most preferred master once the original master is freed. If no alternate master system is available, then the action taken by CA MIM depends on the NOMASTER parameter of the GLOBALVALUE statement.

Note: For more information, see the CA MIM Statement and Command Reference Guide. In a CTCDASD environment, CA MIM migrates to the physical DASD control file before migrating back to the VCF on the second most preferred master.

WARNING! If the master system is shut down and is not freed from the control file, then CA MIM is not synchronized. The master system has a status of MIGRATING and the client systems have a status of AWAKENING when the DISPLAY SYSTEMS command is issued. The master and client systems retain their status until the FREE command is issued or the system is restarted.

For all virtual control file communication methods, if MOSTPREFERRED=YES is specified, then the VCF migrates to the most preferred system when CA MIM is restarted.

To shut down CA MIM on all systems, enter the SHUTDOWN GLOBAL command.