Online installation of catalog structural changes on an IMS system where managed ACB is not enabled and use the local online change

Find the maintenance procedure for online installation of catalog structural changes on an IMS system where managed ACB is not enabled and use the local online change process.

You must have reviewed the information in Prerequisite considerations.

Perform the following steps to implement structural changes to the catalog while IMS is online or active and the managed ACB is not enabled and use the local online change process.

Procedure

  1. Run the DFS3UACB utility to perform an ACBGEN and to populate the new DFSCD000 instance in the IMS Catalog and in the IMS staging ACBLIB data set.
    In the SYSIN DD, specify: BUILD DBD=(DFSCD000,DFSCX000)
    Note: Building DFSCX000 can be optional but adding it provides consistent timestamps.
  2. Copy the new DFSCD000 and DFSCX000 from the staging ACBLIB to the inactive ACBLIB data set.
  3. Take the databases offline by using the following command: /DBR or UPDATE DB … ACCESS(STOP) for DFSCD000 and DFSCX000.
  4. Perform online change /MODIFY PREPARE ACBLIB process.
  5. Perform online change /MODIFY COMMIT process.
  6. Verify that the inactive ACBLIB library is switched to an active ACBLIB.
  7. Start the catalog resources.
    1. Start the DFSCD000 and DFSCX000 databases by using the following command: /START DB or UPDATE DB
    2. Start all the catalog partitions with the OPEN option by using the following command: /START DB or UPDATE DB

      For example, /STA DB DFSCD01 OPEN and /STA DB DFSCX01 OPEN.

The maintenance that provides the catalog resource changes might include post activation procedures. This might include running the IMS Catalog Maintenance utility (DFS3CM00) to update data in the catalog database. You might have to refer to the maintenance hold cards for the post activation steps.