What is Workload Simulator?

Workload Simulator (WSim) is a terminal and network simulation tool. You can use WSim to determine system performance and response time, to evaluate network design, to perform functional testing, and to automate regression testing. Used as a basic tool in a comprehensive test plan, WSim increases the effectiveness of system testing by providing a structured and systematic approach to all phases of system testing.

WSim Version 1 Release 1 runs on any IBM® host processor that supports:

MVS/370 (MVS/SP Version 1 or later)
MVS/XA (MVS/SP Version 2 or later)
MVS/ESA (MVS/SP Version 3 or later)
z/OS® (Version 1 Release 1 or later)
OS/390

In this book, MVS™ is any environment running MVS/370, MVS/XA, or MVS/ESA (unless explicitly stated otherwise).

WSim enables you to test and evaluate teleprocessing systems without needing to have terminals and terminal operators present. You can use WSim to simulate the actions of a number of different applications and terminals. These simulated resources communicate with the real teleprocessing system (referred to as the system under test) as if they were physically present. No modifications to the system under test are required.