Latest Entries

z/BOTTOM LINE:  MainFrames for Life?

Here in Dallas,Texas, dot.com wunderkind-cum-billionaire-cum-pro-basketball owner Mark Cuban is really enjoying himself. He took his unbridled passion for Indiana basketball and decided that here in Texas he just had to be able to listen to the Indiana games, live. That passion turned into the founding of the company Broadcast.com and enabled the development of the technology to allow radio and other live audio to be broadcast over the Internet. A few years later, Yahoo! decided they couldn’t live without that technology and paid over $6 billion for the company. Cuban was only able to pocket about $1.6 billion but now he could turn his attention to what he really loved. He bought Dallas’ pro-basketball team, the Dallas Mavericks…

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A primary objective of ESCON, upon its introduction in 1990, was to simplify configuration management. At that time, several hundred MIPS and, at most, a few terabytes of storage typified even the largest MVS configurations. Before ESCON, 4.5MB/sec. copper bus and tag cables connected these resources. The cables weighed about onehalf pound per linear foot and maximum lengths were limited to 400 feet…

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Back in z/Saddle Again

The fact that you’re reading this magazine means there’s life in mainframes. And the fact that many of you are reading this at SHARE in Dallas means there’s life in user groups, too. That’s no coincidence. User group evolution has paralleled changes in the computing industry and those in mainframe computing in particular, even before it was called that…

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Getting real-time access to that information in its native form is becoming more important to companies, with today’s requirement of continuous availability. According to market research firm IDC, the top two application integration challenges today are integrating new technologies with legacy systems and the many disparate systems that need integration. Fully 55 percent of the users IDC surveyed felt that it’s “critical” or “extremely important” to have products and services that support integration today. Moreover, this number is expected to increase to 85 percent by 2004…

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It may be new to your organization, but Transmission Control Protocol/Internet Protocol (TCP/IP) has been around quite awhile. We’re currently using what’s known as IP version 4 (TCP/IP V4). Each version has represented significant change to meet the demands applications have placed on our IP networks. Today’s new interest in this protocol by businesses and the impact of the Internet are forcing another new wave of changes to the IP protocol — resulting in IP V6 (also called IPNG). The Internet Society, a global group that sets architecture standards and watches out for the health and well-being of IP networks, defined the IP V6 standard…

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VSE/ESA Virtual Storage Management

Among the primary responsibilities of a VSE systems programmer or technician is managing and allocating virtual storage. In doing this, we’re improving resource usage, enabling new or expanded applications, and maintaining or improving performance. As we add or enhance VSE applications, the VSE technician often must re-adjust virtual storage to accommodate those changes…

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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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