Installation requirements for XCF/MRO

For MVS™ images to communicate using MRO between CICS® regions on different z/OS® images, the z/OS images must be joined in a sysplex.

For the hardware and software that are required for z/OS systems in a sysplex, see the Program Directories.

A sysplex consists of multiple MVS images, coupled together by hardware elements and software services. In a sysplex, MVS images provide a platform of basic services that multisystem applications like CICS can exploit. As the workload for an installation grows, additional MVS images can be added to the sysplex so that the installation can meet the needs of the greater workload.

Usually, a specific function (one or more modules or routines) of the MVS application subsystem (such as CICS) is joined as a member (a member resides on one MVS image in the sysplex), and a set of related members is the group (a group can span one or more of the MVS images in the sysplex). A group is a complete logical entity in the sysplex. To use XCF to communicate in a sysplex, each CICS region joins an XCF group as a member, using services provided by DFHIRP.

For information about installing and managing MVS systems in a sysplex, see z/OS MVS Setting Up a Sysplex.