Using the Sysplex Coupling Facility › Coupling Facility Management › Coupling Facility Structure Size Alteration

Coupling Facility Structure Size Alteration

CA Top Secret supports dynamic system‑managed resizing or rebuilding of the coupling facility structure. You can use the SECXCF z/OS operator command to increase the coupling facility structure size with no disruption to the connected systems.

To increase the structure size up to the SIZE value, which is the maximum size defined in the active coupling facility resource management (CFRM) policy, enter:

SETXCF START,ALTER,STRNAME=strname,SIZE=nnn

If the optional initial size (INITSIZE) value was not specified in the CFRM policy, the structure size cannot be increased. In this case, the structure would have been initially allocated based on the maximum SIZE value, rather than the INITSIZE. If the structure is already at the maximum size specified in the CFRM policy, the CFRM must be modified to allow a larger structure size using the SETXCF START, REBUILD command.

When a structure ALTER processing completes, each connected system is posted by the CA Security Coupling Facility Service (CASECCFS) to allow those systems to update the size and utilization counts for the connected structure.