Host Environment

The following recommendations apply:

Modules that must execute as part of SNAP/ABDUMP processing should select macros where the “Host environment” column says “SNAP or IPCS”. Because SNAP/ABDUMP processing may need to be performed in environments where virtual storage is constrained, a very small amount of automatic storage data is recommended. It is also recommended that the location be ANY, if possible.
Modules that only need to execute as part of an IPCS session should select macros from a row where the “Host environment” column says “IPCS”. The path length for these macros is slightly shorter than equivalent “SNAP or IPCS” macros, and the modules that acquire system storage to support this purpose ask for larger increments, reducing the frequency with which system services need to be explicitly requested.