Creating runtime application program resource and descriptor definitions with the CREATE command

With dynamic resource definition (DRD) enabled, you can create runtime application program resources and resource descriptors dynamically, eliminating the need to use the online change process or the batch system definition process with an IMS cold start.

1. Optional: Issue a QUERY PGMDESC DEFAULT(Y) SHOW (ALL) command to view the current application program default settings and evaluate whether they meet your requirements for the new application program resource or descriptor definition.
   If the default settings do not meet your requirements, you have the following options:

   • Override the default settings by issuing the CREATE command with parameter values that meet your requirements.
   • Create the resource or descriptor definition based on an existing resource or descriptor definition by using either the LIKE (RSC(resource_name)) keyword or the LIKE (DESC(descriptor_name)) keyword.
   • Create a default descriptor by issuing a CREATE PGMDESC NAME() SET (DEFAULT(Y)) command with the settings that meet your requirements.
   The next two steps can be performed in any order.
2. Issue a CREATE PGM or CREATE PGMDESC command to create application program resources or descriptors definitions, respectively.
3. Define the application program, as well as its relationships to other resources, by running the Program Specification Block Generation (PSBGEN) utility.