Changing runtime resource definitions

You can create, update, and delete IMS resources and their descriptors dynamically by using DRD. However, you must use the ACB member online change function to change ACB members.

ACB members can be associated to a database or program resource as part of a CREATE DB or CREATE PGM command or with an online change. There are two ways that you can associate ACB members in an IMSplex:

• Create all ACBs in an ACBLIB and then use DRD to associate database and program resources to the ACB.
• Create the database and program resources using DRD commands and then perform an online change to associate the resources to the ACB.

CREATE commands for database and program resources do not require that complimentary ACB members exist in the ACBLIB. If ACB members exist for resources that are being created, the association is created between the resource and the ACB member when the CREATE command is issued, and an online change is not required.