Parallel Sysplex requirements for Db2 data sharing

Coupling facility

Install and define at least one coupling facility to z/OS before enabling the Db2 data sharing function. For high availability, more than one coupling facility is required.

Data sharing member names from the subsystem parameter load module (DSNZPARM) are used to connect members to the coupling facility at Db2 startup. The first connector causes the list structure to be allocated in a coupling facility based on the preference list in the active CFRM policy.