Preparing for Installation › Configuration Requirements › Coupling Facility

Coupling Facility

The CA Top Secret control option OPTIONS(65) controls the action taken when the structure name of the security file active in the coupling facility is different from the structure name of the local security file.

If this option is:

• On and the structure names are different during CA Top Secret startup—The local system disconnects from the coupling facility and aborts.
• On and CA Top Secret is up—The local system disconnects from the coupling facility and forces other systems to disconnect from the coupling facility.
• Off (default)—CA Top Secret connects to the active structure and overrides the local structure.

The CA Top Secret control option OPTIONS(61) uses the coupling facility to hold the file lock record reducing the number of I/Os to the security file. This behavior increases the amount of CPU used due to the IBM support required for the coupling facility.

The SYSID field contains $CFLOCK$, which shows that the system holding the lock is using the lock record in the coupling facility.