z/OS system-managed rebuild and CQS

System-managed rebuild is a z/OS® process by which z/OS rebuilds the structure. z/OS copies the structure contents to a new structure. System-managed rebuild is supported for queue structures and resource structures. System-managed rebuild is only done if no CQS is up. If a CQS is up, the CQS performs a user-managed rebuild and does the structure copy.

Use system-managed rebuild primarily for planned reconfiguration. If the rebuild is initiated with the SETXCF START,REBUILD command and no CQS is available to perform the structure copy, z/OS performs the structure copy.

Restriction: System-managed rebuild does not address coupling facility failures, structure failures, or loss of connectivity. CQS-managed rebuild is required to handle such failures.

To enable a structure for system-managed rebuild, add the following parameter to your CFRM couple data set utility job, then run the job control language (JCL) to format the CFRM couple data set with system-managed rebuild capability:

ITEM NAME(SMREBLD) NUMBER(1)