Before you start
Before you perform the customization tasks in this chapter, there are a number of configuration options that you should consider because they affect the performance and resource requirements of WebSphere MQ for z/OS.
In the description of each task in this section, and in Table 3, we indicate whether:
- The task is part of the process of customizing WebSphere MQ. That is, you perform the task once when you customize WebSphere MQ on the z/OS system. (In a parallel sysplex, perform the task for each z/OS system in the sysplex, and ensure that each z/OS system is set up identically.)
- The task is part of adding a queue manager. That is, you perform the task once for each queue manager when you add that queue manager.
- You need to perform the task when migrating. If you are migrating from a previous version of WebSphere MQ for z/OS, you might not need to perform all these tasks.
You should review the tasks when you apply corrective maintenance to WebSphere MQ and when you install a new version or release of WebSphere MQ.
None of the tasks require you to IPL your z/OS system, provided that you use commands to change the various z/OS system parameters, and perform Task 12: Update SYS1.PARMLIB members as suggested.
We strongly recommend that all z/OS systems in a sysplex are set up identically, so that queue managers can be quickly created on any system in an emergency.