Requirements for an IMSplex

The minimum configuration for an IMSplex is an IMS control region and one set of CSL components (an OM, an RM, and an SCI) in one z/OS image and another (one or more) z/OS image (forming the sysplex) with a single SCI and a single IMS. Figure 28-2 on page 499 illustrates a similar configuration: one z/OS image with an IMS and one each of the CSL components, and two other z/OS images each with a single IMS and a single SCI.

Figure 28-2. Minimum CSL Configuration for an IMSplex

All IMSs in an IMSplex must have a unique IMSID.

A single point of control (SPOC) application is required if you want to use certain CSL functions, such as performing a global online change.

Restriction:

The maximum configuration for an IMSplex is 32 control regions, 32 CQSs, and a maximum of 1023 total system address spaces.