GSAM processing data set pre-allocation for the IMS Catalog Populate (DFS3PU00) utility

In IMS 15, you can use the IMSDG001 DD statement to define an empty work data set to be temporarily used as an IMS.ACBLIB data set for the IMS Catalog Populate utility (DFS3PU00) when the IMS management of ACBs is enabled. Use this DD statement to define a work data set manually instead of the DFS3PU00 utility dynamically creating and deleting a work data set.

IMSDG001 is an optional control statement. The empty work data set that you define by using this statement temporarily holds the IMS.ACBLIB data set members that reference a generalized sequential access method (GSAM) database. The DFS3PU00 utility then moves the ACBLIB members into the IMS directory data set after it copies the ACB library members from the libraries that are specified on the IMSACBnn DD statement.

Changes to utilities

A new control statement, IMSDG001, is added to the IMS Catalog Populate utility (DFS3PU00).

Documentation changes

The following table lists the publications that contain new or changed topics for the New function name enhancement. Publications that are not impacted by this enhancement are not included in the table.

Table 1. Links to topics that have new or changed content for this enhancement
Publication	Links to topics
Release planning	IMS 15 Database Manager continuous delivery functions GSAM processing data set pre-allocation for the IMS Catalog Populate (DFS3PU00) utility (new) (this topic)
System utilities	IMS Catalog Populate utility (DFS3PU00)