Post migration tasks

Follow the steps to perform the tasks you need to carry out after migrating a single IBM® MQ queue manager on z/OS®,

1. Check the changes in behavior made by default configuration changes.
   The default values of some properties might have been changed in the new version, which can lead to changes in behavior.
2. Modify backup and other administrative jobs, such as jobs to backup IBM MQ objects and channel authentication records, and MAKEDEF jobs.
   For example using CSQUTIL COMMAND MAKEDEF(..); see Using the COMMAND function of CSQUTIL to refer to the target version of IBM MQ libraries.
3. Update the system parameter (ZPARM) module if required.
   Note the following:

   • You should review changes to the ZPARM parameters between the version you have migrated from, and IBM MQ 9.2.0.
   • If you need to change the value of any parameters, you should generate a new ZPARM at this point. Do this by:
     1. Tailoring the ZPARM sample to use the new IBM MQ libraries
     2. Updating values for the parameters as necessary, and
     3. Recompiling, to generate the new ZPARM.
   • You do not have to recompile the ZPARM, if you do not change the values of any parameters.

   If migrating from IBM MQ for z/OS 9.0.0 you should ensure your ZPARM does not reference the OPMODE parameter as it is no longer supported. If OPMODE is specified, you will get a warning at assemble time.

4. Perform a full regression test.
5. Migrate client applications.
   Client applications can be considered any time throughout the migration phase.

   Clients are backwards and forwards compatible. It is advisable to migrate the client libraries to the same, or later, level as the queue manager, so that the latest function is available.

6. Exploit new functions provided by the migrated queue manager.
   Your queue manager has been fully migrated to a new version level, so you can now take benefit of new capabilities.

   However, note that additional configuration might be required to enable selected new features.

   Review What's new and changed in IBM MQ 9.2 and check which features best serve your business needs. Plan your action to develop new applications, or changing configurations, to enable those features.

7. If you created a new mqweb server for the latest version, you can stop the mqweb server for any previous versions when all queue managers on the z/OS system have been migrated to the latest version.