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Implementations of IMS Subsystems to z/OS

Category: IMS
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IMS is a large application that runs on z/OS. There is a symbiotic relationship between IMS and z/OS. Both are tailored 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,1 as in the IMS control region. The term region is synonymous with a z/OS address space. The various components of an IMS system are explained in more detail in “Structure of IMS Subsystems.”


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