A CICS resource like a transaction with all its characteristics (first program, restartable, …) is described in resource configuration files. The Tuxedo configuration elements, like how many servers of which group on which machine will offer this transaction is described in the Tuxedo configuration file UBBCONFIG.

This way the responsibilities are clearly distributed:

• Configuration of the resources guaranties the functional behavior of a CICS application.
• Configuration of the Tuxedo system guaranties optimal performance and robustness in production.

• Resource Definition Directory