How system definition is related to installation

System definition and JCL preparation are only a part of the total installation process. You should understand the relationship between installation and system definition before defining your system.

Related reading: For step-by-step instructions on installing an IMS system, see IMS Version 15.3 Installation.

A full installation process includes:

1. Building IMS system libraries
2. Allocating and cataloging IMS data sets
3. Defining the IMS system
4. Preparing the operating system for IMS, including:
   • VTAM®
   • RACF®
   • APPC/MVS™
5. Installing IMS exit routines
6. Tailoring IMS buffers and certain performance options
7. Defining terminals (VTAM and non-VTAM)
8. Updating MFS device characteristics table and MFS default formats
9. Defining LU 6.2 descriptors
10. Defining ETO descriptors
11. Building IMS.DBDLIB
12. Building IMS.PSBLIB
13. Building IMS.ACBLIB
14. Preparing for dynamic allocation of databases and related system data sets
15. Compiling message format descriptions
16. Loading application programs
17. Initial loading of databases
18. Establishing IMS security
19. Initializing IMS.MODSTAT
20. Copying staging libraries to active libraries