Chapter 28. IMSplexes

An IMSplex is one or more IMS address spaces that work together as a unit. Typically, but not always, these address spaces:

• Share either databases, resources, or message queues (or any combination)

• Run in a z/OS Parallel Sysplex environment

• Include an IMS Common Service Layer (CSL)

The address spaces that can participate in the IMSplex are:

• Control region address spaces

• IMS manager address spaces (OM, RM, SCI)

• IMS server address spaces (Common Queue Server [CQS])

An IMSplex provides the ability to manage multiple IMS systems as if they were one system (a single-system perspective). An IMSplex can exist in a non-sysplex environment or can consist of multiple IMS subsystems (in sharing groups) in a sysplex environment.

Related Reading:

• For complete details about setting up a sysplex, see z/OS MVS Setting Up a Sysplex.

• For the details of IMSplex components, see IMS Version 9: Common Service Layer Guide and Reference.

This chapter discusses an IMSplex with a CSL included.

In This Chapter:

• "Components of an IMSplex"

• "Requirements for an IMSplex" on page 498

• "Operating an IMSplex" on page 499