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33.2 Conversion Tools

33.2.1 VSE/ESA Facilities

VSE/ESA 2.3 added a new function useful for developing an inventory of a VSE/ESA systems jobs, including the so-called hidden JCL found in standard label areas and in standard assignments. The VSE/ESA JCL Analyzer is included in ICCF library 59 as a sample source program that can be tailored to extend its functions.

Output from the JCL Analyzer is a Comma Delimited Text file, in a format suitable for processing by programs on PCs, such as Lotus1-2-3 spreadsheet or the VisualAge Application Understanding tools running on OS/2 or Windows NT. The Application Understanding tool can display a graphical analysis of the JCL job stream.

You can find further details at the following Web sites:

http://www.software.ibm.com/ad/va2000

http://www.software.ibm.com/ad/cobol

For an overview, see VSE/ESA Enhancements Version 2 Release 3, SC33-6629. Note that this facility is available via PTF for VSE/ESA 1.4, 2.1, and 2.2, as well as

2.3.Member ARDWREAD in ICCF library 59 is a detailed description of the JCL Analyzer. Sample jobstreams are provided along with the programs required.

33.2.2IBM OPTI-AUDIT for VSE

While the IBM OPTI-AUDIT product was originally developed for performing an assessment of Year 2000 readiness, it is also an excellent tool to use when performing the similar set of activities associated with a VSE to OS/390 conversion; that is, taking an inventory and assessment of the programs, data sets and JCL that will be converted.

IBM OPTI-AUDIT for VSE Version 1.1.0 is a new program offering that enables you to perform a static analysis of VSE libraries and build an inventory of all programs contained on your VSE system. This is a vital first step in your year 2000-readiness planning. IBM OPTI-AUDIT is a powerful tool designed to assist you with your migration from an earlier VSE SP or ESA system to a current VSE/ESA Version 2 system. It can also be used when converting from VSE/SP or VSE/ESA system to OS/390.

IBM OPTI-AUDIT for VSE monitors the execution of batch jobs extracting job/program/file cross-referencing information. Use IBM OPTI-AUDIT as a source scanning facility on COBOL source code.

IBM OPTI-AUDIT for VSE produces a variety of reports to manage the year-2000 conversion process, including:

520VSE to OS/390 Migration Workbook

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IBM OS/390 manual Conversion Tools 33.2.1 VSE/ESA Facilities, IBM OPTI-AUDIT for VSE

OS/390 specifications

IBM OS/390, a versatile operating system, was a cornerstone in enterprise environments and played a pivotal role in mainframe computing. Released in the mid-1990s, OS/390 combined the strengths of IBM's MVS (Multiple Virtual Storage) with new features and enhancements, targeting scalability, reliability, and performance in demanding business applications.

One of the key features of OS/390 was its robust support for multiple users and processes. The system allowed thousands of concurrent users to access applications and data, ensuring high availability and minimizing downtime—a critical requirement for many large organizations. This scalability was supported through various enhancements in memory management and processor scheduling, enabling optimal resource allocation across diverse workloads.

OS/390 was known for its superior workload management capabilities. The Workload Manager (WLM) component allowed administrators to define service policies, specifying how system resources would be allocated according to the priority of tasks. This ensured that critical business processes received the necessary resources while less critical tasks were managed more flexibly.

Another significant characteristic of OS/390 was its commitment to security. The operating system provided comprehensive security features, including user authentication, data encryption, and auditing capabilities. This focus on security was vital for organizations handling sensitive data, ensuring compliance with regulations and safeguarding against unauthorized access.

OS/390 also supported advanced technologies that facilitated integration and development. The system included features like the IBM CICS (Customer Information Control System) for transaction processing and IMS (Information Management System) for database management. These technologies allowed organizations to build robust, high-performance applications tailored to specific business needs.

The ease of network integration was another strength of OS/390. With the advent of the Internet and global connectivity, OS/390 systems could easily interface with various network protocols, enabling businesses to operate in a connected world. This inclusion paved the way for many organizations to expand their capabilities and offer new services, driving digital transformation.

In conclusion, IBM OS/390 represented a significant advancement in mainframe technology, combining scalability, security, and robust workload management. Its rich feature set and support for critical enterprise applications solidified its role as a vital component of many organizations' IT infrastructures, ensuring they could meet their operational challenges head-on while supporting future growth. As technology continues to evolve, the legacy of OS/390 remains influential in the realm of computing.