Follow these steps when designing an initialization/termination program:

1. Decide what servers the initialization/termination program will define. The main considerations are server resources and recovery.
   • Resources -- The initialization/termination program can obtain and release resources such as storage and data sets for its servers. If servers share resources, you can increase their efficiency by having a single initialization/termination program define the servers and obtain and release the resources for them.
   • Recovery -- If a server fails and cannot recover, MVSSERV calls the server's initialization/termination program to terminate all the servers it defined. Therefore, you might want to define related servers in the same initialization/termination program, and define unrelated servers in different initialization/termination programs.
2. Decide how to package the initialization/termination program in relation to the servers.
   You can package servers and their initialization/termination program as CSECTs of the same load module or as different load modules. The main consideration is server loading:

   • If you do not want the initialization/termination program to load the server, place the initialization/termination program and server in the same load module. The initialization/termination program can use a constant server address to define the server to MVSSERV.
   • If you want the initialization/termination program to load the server, place the initialization/termination program and server in different load modules. The initialization/termination program can get the server address from the LOAD macro to define the server to MVSSERV.
3. Decide whether the initialization/termination program server should use 24- or 31-bit addressing. Initialization/termination programs can execute in AMODE 24 or 31, and RMODE 24 or ANY.
4. Select a name for the initialization/termination program. Names can have up to eight characters, including the characters A-Z, 0-9, @, #, and $. The first character cannot be 0-9.
5. Put the name of the initialization/termination program in the input parameter data set (see Installing Programs and Data Sets for Use with MVSSERV).