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Every job executes in a subsystem. Therefore, the way in which subsystems are defined and used on your system greatly affects how your system performs.

This course describes how to manage the subsystems on your IBM i system. The course first presents the commands used to start and stop a subsystem. It then takes a detailed look at the contents of a subsystem description. You will see not only the attributes that define a subsystem, but also the contents of a routing entry and each type of work entry.

The course then shows different methods you can use to create a subsystem description. Next, you will see how to modify the attributes of a subsystem description and how to add, modify, and delete routing and work entries. The course ends by showing how to delete a subsystem description.

Approximate Study Time: 90 minutes


After completing this course, you should be able to:

  • Start and stop a subsystem
  • Examine a subsystem description
  • Name and describe the values that are stored in a subsystem description
  • Use the CRTDUPOBJ command to create a copy of a subsystem description
  • Use the Work with Objects display to create a copy of a subsystem description
  • Use the CRTSBSD command to define a new subsystem description
  • Alter the attributes of a subsystem
  • Add a new workstation, job queue, or routing entry to a subsystem description
  • Change or remove a workstation, job queue, or routing entry
  • Delete a subsystem description

Topic Outline

Starting and Ending a Subsystem

Examining a Subsystem Description

Creating a Subsystem Description

Modifying a Subsystem Description

Deleting a Subsystem Description


This course is intended for anyone responsible for managing the system activity of an IBM i system. System administrators, system programmers, and system operators would be personnel operating in this job capacity.


This course assumes that you have a basic knowledge of IBM i facilities. You can satisfy this prerequisite by successfully completing the courses in the Introduction to the IBM i Environment series.

In addition, you should have an understanding of IBM i work management concepts and system values. You can satisfy these prerequisites by successfully completing the first two courses of this series: