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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 4. IMS and z/OS

IMS subsystems are implemented on a z/OS system. IMS uses some of the facilities of the z/OS operating system.

In This Chapter

How IMS Relates to z/OS

Structure of IMS Subsystems

Running an IMS System

Running Multiple IMS Systems

How IMS Uses z/OS Services

How IMS Relates to z/OS

IMS is a large application that runs on z/OS. IMS and z/OS are both designed to provide the most efficient use of the hardware and software components.

IMS runs as a z/OS subsystem and uses several address spaces: one controlling address space, several separate address spaces that provide IMS services, and several address spaces that run IMS application programs. z/OS address spaces are sometimes called regions, as in the IMS control ...

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