Work management for IBM i

This information describes the way in which IBM MQ handles work requests, and details the options available for prioritizing and controlling the jobs associated with IBM MQ.

Warning

Do not alter IBM MQ work management objects unless you fully understand the concepts of IBM i and IBM MQ work management.

Additional information regarding subsystems and job descriptions can be found under Work Management in the IBM i product documentation. Pay particular attention to the sections on Starting jobs and Batch jobs.

IBM MQ for IBM i incorporates the IBM i UNIX environment and IBM i threads. Do not make any changes to the objects in the Integrated File System (IFS).

During normal operations, an IBM MQ queue manager starts a number of batch jobs to perform different tasks. By default these batch jobs run in the QMQM subsystem that is created when IBM MQ is installed.

Work management refers to the process of tailoring IBM MQ tasks to obtain the optimum performance from the system, or to make administration simpler.

• Change the run-priority of jobs to make one queue manager more responsive than another.
• Redirect the output of a number of jobs to a particular output queue.
• Make all jobs of a certain type run in a specific subsystem.
• Isolate errors to a subsystem.

Work management is carried out by creating or changing the job descriptions associated with the IBM MQ jobs. We can configure work management for:

• An entire IBM MQ installation.
• Individual queue managers.
• Individual jobs for individual queue managers.

• IBM MQ tasks for IBM i
  This is a table of the IBM MQ for IBM i jobs and a brief description of each.
• Work management objects on IBM i
  When IBM MQ is installed, various objects are supplied in the QMQM library to assist with work management. These objects are the ones necessary for IBM MQ jobs to run in their own subsystem.
• How IBM MQ uses work management objects on IBM i
  This information describes the way in which IBM MQ uses the work management objects, and provides configuration examples.
• Default system examples for IBM i
  These examples show how an unmodified IBM MQ installation works when some of the standard jobs are submitted at queue manager startup time.
• Configure work management examples on IBM i
  Use this information to learn how we can change and create IBM MQ job descriptions to change the runtime attributes of IBM MQ jobs.

Parent topic: Administer IBM MQ for IBM i