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MVS Performance Management z/OS Version

CICS is simultaneously the most sophisticated exploiter of goal mode and the subsystem most in need of care and attention to ensure goal mode success. IMS has these attributes to a lesser extent. What follows applies to both CICS and IMS, unless otherwise noted. For the sake of simplicity, we’ll stick to CICS as denoting both. When a system is initialized in goal mode or switched from compatibility mode to goal mode, CICS may operate in either of two management styles. The CICS address spaces (CICS and IMS address spaces are usually called “regions,” reflecting the MVT roots of both subsystems) may run with resources allocated based on their velocity goals, or the response time goals of selected transactions may determine the treatment of the regions. Since OS/390 2.10, both of these styles may coexist in the systems in a sysplex that is running in goal mode. In earlier OS/390 levels, the styles were mutually exclusive…

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When IBM announced the System/ 360 line in 1964, it was nothing less than revolutionary. Here was a family of machines, scalable to fit any organization’s needs, all able to run the same Operating System (OS) and applications. We take such things for granted today but pre-System/360, the norm was that a new machine meant significant application reengineering…

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Over the past 20 years, the software charges related to an upgrade or acquisition of a new mainframe have overtaken the hardware charges. The software cost is now an obstacle to upgrades, replacements, and new mainframe systems. Users are willing to pay for what they use, but the mainframe charging model has been primarily based on the size of the computer — not computer usage. Installations also want charges they can more easily plan and budget for…

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At conferences and regional user group meetings, IBM has been leaking out details about the next version of DB2 for z/OS. This article provides a concise overview of some features and functions IBM has been touting. Remember, though, that this is merely an overview of some of the features you can expect in DB2 Version 8; more details will become available later this year.

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Web services are the latest in a series of industry-wide initiatives to connect and integrate extended enterprise applications. Despite having few deployments to date, Web services have generated a wave of excitement and bring the promise of delivering systems interoperability. Much has been written about creating new applications within a Web services framework and how Web services work. The reality, however, is that most of today’s IT systems still run on legacy platforms and simply aren’t architected to take advantage of new technologies. These systems, built at a high cost over many years, often have the knowledge of the business locked within them. There’s no simple way to replace them. No extended enterprise solution is complete without a viable approach to embracing the legacy platform.

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Anyone who has followed the Virtual Machine (VM) Operating System (OS) over the last 20 years knows that times have often been tough for VM and its users. The good news is that VM is undergoing a renaissance. The term “renaissance” is particularly apt in this case. Derived from words meaning “new birth,” renaissance is defined as, 1) a revival of intellectual or artistic achievement and vigor: the Celtic Renaissance, or 2) the period of such a revival. VM has indeed been reborn in a new role…

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