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Defining Your Subsystem z/OS MVS Using the Subsystem Interface SA38-0679-00 |
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If you want to use dynamic SSI services, your subsystem must be
defined to MVS™ in one of the
following ways:
The maximum number of subsystems you can define is 32,767. If you do not want to be able to use dynamic SSI services, your subsystem must be defined to MVS at IPL time in the positional format of the IEFSSNxx parmlib member. See z/OS MVS Initialization and Tuning Reference for detailed information on the syntax and rules for coding IEFSSNxx. See z/OS MVS Programming: Authorized Assembler Services Reference EDT-IXG for information on the syntax and rules for coding the IEFSSI macro. See z/OS MVS System Commands for information on the syntax and rules for issuing the SETSSI system command. There are some special things to think about when defining your
subsystem, including:
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