Summary of changes

The affinity utility program is an integral part of CICS Transaction Server for OS/390 and is for use only with the CICS Transaction Server for OS/390.

To use the utility on CICS for MVS/ESA 4.1 and earlier releases of CICS, install the IBM CICS Transaction Affinities Utility MVS/ESA (program number 5696-582).

Changes for the CICS Transaction Server for OS/390 Release 3 edition

This book is based on the CICS Transaction Server for OS/390, release 2, edition, SC33-1777-01.

Signi®cant changes for this edition are indicated by vertical lines to the left of the changes.

Changes for the CICS Transaction Server for OS/390 Release 2 edition

This book is based on the CICS Transaction Server for OS/390, release 1, edition, SC33-1777-00.

A new section has been added to ªChapter 6. Running the Reporterº on page 41. ªUsing the IBM Cross System Productº on page 50 describes the use of the Transaction Affinities Utility with programs developed using the IBM Cross System Product.

Changes for the CICS Transaction Server for OS/390 Release 1 edition

The chapter entitled ªInstalling the affinity utilityº was renamed to ªPreparing to use the Transaction Affinities Utilityº, and was largely rewritten.

The messages and codes previously published in Appendix C were moved to the CICS Messages and Codes manual. The affinity utility program messages became standard CICS messages. They are pre®xed with the letters ªDFHº, and have a component identi®er of ªAUº.

© Copyright IBM Corp. 1994, 1999

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IBM OS manual Summary of changes

OS specifications

IBM OS, or IBM Operating System, refers to a family of operating systems developed by IBM to support its hardware architectures. IBM has produced a range of OS versions tailored for different computing needs, such as mainframes, servers, and personal computers. Among the most notable operating systems in IBM's portfolio are OS/2, z/OS, and AIX, representing a blend of innovation and reliability that has defined IBM's reputation in the computing world.

One of the defining features of IBM OS is its robust multitasking capabilities. Both z/OS, predominantly used in IBM's mainframe environments, and AIX, the Unix-based system for IBM Power Systems, support multiple users and processes simultaneously. This ability allows organizations to run numerous applications in parallel efficiently, maximizing resource utilization and improving productivity.

In terms of security, IBM OS incorporates advanced features aimed at protecting data and maintaining integrity. z/OS offers multifactor authentication, data encryption, and a security model that adheres to the latest regulatory requirements. AIX provides Secure Virtualization, which enhances isolation and security in cloud environments, essential for enterprises handling sensitive information.

Another key characteristic is the adaptability of IBM OS to modern technologies. For instance, z/OS is designed to integrate with cloud computing, open source, and DevOps practices. This adaptability supports organizations in modernizing their infrastructure while retaining the stability associated with IBM solutions. AIX similarly supports containerization and virtualization, which are critical for optimizing resource usage in dynamic computing environments.

IBM's commitment to scalability is evident across its OS offerings. Organizations leveraging z/OS can handle enormous workloads and transactional volumes, making it a preferred choice for industries like finance and telecommunications. AIX also supports scalability, allowing businesses to expand their computing resources as demands grow without significant downtime.

The availability of development tools and environments is another noteworthy aspect of IBM OS. With robust IDEs and programming languages support, developers can create and deploy applications smoothly. This assists businesses in streamlining their development processes and improving time-to-market for innovative solutions.

In summary, IBM OS encompasses a suite of operating systems characterized by multitasking, security, adaptability to modern technologies, scalability, and comprehensive development support. These features have cemented IBM's position as a leader in enterprise solutions, allowing organizations across various industries to thrive in an increasingly digital world.