z/OS components and system services used in an IMSplex

The z/OS® components that are used in an IMSplex include the Coupling Facility and its cache, list, and lock structures.

An IMSplex takes advantage of several z/OS system services:

z/OS cross-system coupling facility

An IMSplex uses XCF for communication services. XCF services allow authorized programs on one system to communicate with programs on the same system or on other systems.

automatic restart management (ARM)

An IMSplex uses ARM for recovery services. ARM restarts subsystems, all the elements of a workload on another z/OS image after a z/OS failure, and a failed z/OS image.

cross-system extended services (XES)

An IMSplex uses XES for data sharing services and system-managed rebuild support.