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An Introduction to IMS: Your Complete Guide to IBM Information Management System by Steve Nathan, Sandy Sherrill, Rick Long, Moira McFadden Lanyi, Margaret Wilson, Kenny Blackman, John Butterweck, Diane Goff, Barbara Klein

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Chapter 28. IMSplexes and the IMS Common Service Layer

An IMSplex is comprised of IMS and z/OS components that work together to improve the overall manageability of your IMS environments. An IMSplex contains one or more IMS subsystem components that work as a unit.

Typically, but not always, these address spaces:

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

• Run in a z/OS Parallel Sysplex environment

• Include an IMS Common Service Layer (CSL)

The CSL is a collection of IMS manager address spaces that provide the infrastructure needed for systems management tasks in an IMSplex. The CSL address spaces include Open Database Manager (ODBM), Operations Manager (OM), Resource Manager (RM), and Structured Call Interface (SCI). ...

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