Multi-CPU Configuration With Shared-DASD Only

The following figure shows a Multi-CPU configuration with Shared DASD only:

Figure 38 Multi-CPU Configuration with Shared DASD Only

This configuration consists of two mainframes that only employ shared DASD (that is, there is no shared Spool). Each CPU runs its own Control‑M system.

DISK 1 may or may not be connected to CPU B. DISK 2 may or may not be connected to CPU. A The IOA/Control‑M Core and Repository do not need to reside on a shared disk.

However, a shared IOA Condition file is necessary to support this environment. It enables communication between two Control‑M systems that run in different CPUs and are not connected using a shared Spool.

Communication is established by sharing prerequisite conditions. These shared prerequisite conditions enable the two Control‑M systems to know the status of production work in both CPUs.

The two CPUs must employ a global ENQ-handling product (such as GRS or MIM). For further information see the SHRQNAM parameter in the IOA chapter of the INCONTROL for z/OS Installation Guide: Installing.