Start of change

Migration step 17: Refresh the z/OS definition of Db2

As part of the migration to Db2 12, you must refresh how Db2 is defined to z/OS.

Before you begin

Complete the following tasks:

About this task

This migration task is necessary to apply changes for Db2 12 migration in the following z/OS structures:
  • The link list look-aside address space (LLA), which contains the Db2 12 early (ERLY) code from the SDSNLINK load module library.
  • Member IEAAPFxx, for new APF libraries.
  • Member LNKLSTxx, for new load module libraries.
  • JCL startup procedures for the Db2 12 address spaces, including WLM environments used by stored procedures and user-defined functions.
  • JCL procedures for preparing Db2 12 application programs.

Procedure

Refresh how Db2 is defined to z/OS by using one of the following approaches:
  • Do an initial program load (IPL) of z/OS. You must choose this approach if you issued z/OS SETPROG LINKLST commands to refresh the system link list in member LNKLSTxx.

    After the IPL of z/OS completes, message DSN3100I is displayed on the z/OS console, stating that Db2 is ready for the START command.

  • If you changed to a new version of the ERLY code, and you did not refresh the system link list in member LNKLSTxx, run the -REFRESH DB2,EARLY command from a z/OS console that has START command capability. When -REFRESH DB2,EARLY is run, previous copies of the ERLY modules are deleted from the system the next time that Db2 is started. -REFRESH DB2,EARLY is valid only when Db2 is not started.

What to do next

Migration step 18: Start Db2 12
End of change