Appendix B. Mapping ISV Products and Functions

Chapter 34. Customer Migration Example

Chapter 33. Conversion Services and Tools

32.5.1Program Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . 503

32.5.2JCL Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 504

32.5.3Phase 4: Initial Trial Conversion . . . . . . . . . . . . . . . . . . . . 505

32.5.4Phase 5: OS/390 Regression Tests and Repeated Trial

Conversions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506

32.5.5Initialization Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 511

32.5.6Unit Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 511

32.5.7System Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 513

32.5.8 Parallel/Production Simulation Testing

. . . . . . . . . . . . . . . . 514

32.6Implementation Phases . . . . . . . . . . . . . . . . . . . . . . . . . . . . 515

32.6.2 Phase 6: Actual Conversion and Switchover . . . . . . . . . . . . . 516

32.6.3Switchover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 517

32.6.4 Phase 7: Initial OS/390 Operations . . . . . . . . . . . . . . . . . . . 518

. . . . . . . . . . . . . . . . . . . 519

33.1Conversion Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 519

33.1.1IBM Global Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . 519

33.1.2 Automated Migration Services (AMS) . . . . . . . . . . . . . . . . . 519

33.2Conversion Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 520

33.2.1VSE/ESA Facilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 520

33.2.2IBM OPTI-AUDIT for VSE . . . . . . . . . . . . . . . . . . . . . . . . . 520

33.2.3	IBM COBOL and CICS Command Level Conversion Aid (CCCA) .	522
33.2.4	SISRO - CORTEX-Migration System (CORTEX-MS)	524

33.2.5Computer Associates . . . . . . . . . . . . . . . . . . . . . . . . . . . 525

33.2.6The Source Recovery Company . . . . . . . . . . . . . . . . . . . . . 525

Part 8. Migration Experience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 527

. . . . . . . . . . . . . . . . . . . . . 529

34.1Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 529

34.2Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 529

34.3Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 530

34.4Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 530

34.5Duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 531

34.6Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 531

34.7Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 532


Part 9. Appendixes			533
Appendix A. Education Information			535
A.1	What Training is Needed and What Training Courses are Available . .		535
A.1.1		OS/390 Classes	535
A.1.2		Custom Classes	536
A.1.3		OEM Product Education	536
A.2	When are Courses Scheduled and When are they Needed?		536
A.3	Who will Provide the Training?		537
A.4	Where will the Training Take Place?		537
Appendix B. Mapping ISV Products and Functions			539
B.1	The IBM Software Migration Project Office (SMPO)		539
B.2	VSE ISV System Management Products and OS/390 Compared		539
Appendix C. DFSMS Naming Conventions			543

Contents xv

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.

IBM OS/390 manual Appendix B. Mapping ISV Products and Functions

Models: OS/390

Appendix B. Mapping ISV Products and Functions

OS/390 specifications