You must make many decisions and perform many tasks to install, initialize, and start JES3. This information is intended to guide you through the decision making process and help you perform the required tasks. Before installing JES3 however, you must make sure that your installation has the hardware needed to support JES3. You should also plan the layout of your I/O devices and learn how to install JES3.

Before you read this information, you should read z/OS JES3 Introduction to gain a basic understanding of JES3. For information on software and hardware requirements, and compatibility and coexistence requirements, see z/OS V2R1 Information Roadmap.