component had to automatically commit IMS edit changes every time the user pressed Enter The ability to translate more template criteria to IMS Segment Search Arguments (SSAs), resulting in the ability to find selected segments more quickly The ability to allow two concatenated database-description (DBD) libraries to be specified instead of one A customization option to limit access to specified IMS subsystems to read only The ability to automatically delete dynamic DBDs The ability for the File Manager IMS component editor and browser to show the total number of segments in a database, as well as the number of segments currently selected Support for templates that allow multiple layout members to be used to map a segment 2.5.5 Flexible file processing to meet your business goals File Manager is designed to help increase productivity and lower costs as you build and test new and existing applications. You can use it to quickly create, edit, print, and reformat data files and to build new applications easily. With File Manager, you will gain the flexibility you must have to build, leverage, and extend your assets to meet your business goals. 2.5.6 For more information To learn more about IBM File Manager for z/OS, visit: http://www-306.ibm.com/software/awdtools/filemanager/ 2.6 Workload Simulator for z/OS and OS/390 Workload Simulator (WSim) is a terminal and network simulation tool that can help you test your networks and determine whether your infrastructure is capable of handling an expected additional workload. It provides the ability for the simulation of terminals and associated messages, including provision for you to alter message loads during a run. WSim has evolved from the IBM TeleProcessing Network Simulator (TPNS) product. The addition of an interactive ISPF-based Test Manager (WTM) can significantly assist users with the development and management of test cases, automation of test runs, and analysis of results. At the same time, support for obsolete and little-used functions has been removed. The IBM Web Sphere Studio Workload Simulator (WSWS) tool can be used to provide similar functionality for browser-based infrastructures. 2.6.1 What Workload Simulator can do Workload Simulator enables users to perform the following functions: Functional testing to ensure that a new program or subsystem is performing in accordance with specification Regression testing to ensure that a modified program or subsystem is still performing in accordance with original specifications where no changes were required Performance, stress, and capacity testing to ensure that a system can handle the projected load with acceptable response times Chapter 2. Overview of the Problem Determination and Deployment Tools 31