Migrating CICS to a Parallel Sysplex

Migrating CICS® systems and applications from a non-sysplex z/OS® environment to a sysplex that uses the coupling facility (a Parallel Sysplex®)

Sysplex and Parallel Sysplex

A sysplex is a set of z/OS systems that communicate with each other through certain multisystem hardware components and software services. A sysplex allows resource sharing between communicating systems (tape, consoles, catalogs, and other resources). The sysplex increases the number of processing units and z/OS operating systems that can cooperate, which increases the amount of work that can be processed.

A Parallel Sysplex is a sysplex that uses one or more coupling facilities (CFs). A coupling facility is a special logical partition that provides high-speed caching, list processing, and locking functions in a sysplex. A Parallel Sysplex allows data sharing such that any system in the sysplex can be capable of running the workload.

Note: From here on, this documentation does not differentiate between a sysplex without a coupling facility and a sysplex with a coupling facility. It assumes that you have a coupling facility and are migrating to a Parallel Sysplex. When you see the term sysplex, understand it to mean a Parallel Sysplex.