Span of z/OS Workload Manager operation

The z/OS Workload Manager operates across a sysplex. There can be only one active service policy for all z/OS images running in a sysplex.

All CICS regions (and other z/OS subsystems) running on a z/OS image with z/OS workload management active are subject to the effects of workload management.

If the CICS workload involves non-CICS resource managers, such as DB2 and DBCTL, CICS passes information through the resource manager interface (RMI) to enable the z/OS Workload Manager to relate the part of the workload within the non-CICS resource managers to the part of the workload within CICS.

The CICS interface modules that handle the communication between a task-related user exit and the resource manager are usually referred to as the resource manager interface (RMI) or the task-related user exit (TRUE) interface.