Advanced Topics › Control and Checkpoint File Considerations › Coupling Facility Structure System-Managed Rebuild

Coupling Facility Structure System-Managed Rebuild

CA MIM provides full support for system-managed rebuild of coupling facility structure control files. This feature is supported when CA MIM is executing on any z/OS operating system and all CA MIM MIMplex members are executing at a supported release of CA MIM. This means that CA MIM continues to operate while the system-managed rebuild process moves a coupling facility structure control file from one coupling facility to a new coupling facility.

You start this process by issuing the following command:

SETXCF START,REBUILD 

This process does not require any special CA MIM commands or procedures preceding or following the system-managed rebuild operation.

Notes:

• For information regarding the system-managed rebuild function of a coupling facility, see the IBM publication Setting Up a Sysplex.
• IBM coupling facility system-managed rebuild is a planned, operator-initiated function for moving coupling facility resources. Do not invoke it for coupling facility hardware or coupling facility link types of failures. CA MIM continues to react to a coupling facility structure control file error by marking the file in error and initiating a control file migration in the case of an error on the IN-USE control file.
• You cannot use the MVS REBUILD command to change the size of a CA MIM list structure. Instead, use the DEALLOCATE and ALLOCATE commands.