Latest Entries

Opening Up zStorage

For many years, storage and storage interfaces could have been viewed as the Rodney Dangerfield of the IT infrastrure. It “didn’t get no respect.” Long considered only as a cost — measured by dollar per-megabyte ($/MB) and, more recently, as dollar per-gigabyte ($/GB) — storage has only recently (coinciding with the growth of e-commerce) been seen as cool and trendy…

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For almost four decades, IBM has built upon its mainframe platform’s strengths. Through multiple hardware generations, thousands of companies worldwide have run strategic operations on “blue” hardware. Starting with the System/360, announced in 1964, through the System/370 in the 1970s, System/370-XA and -ESA in the 1980s, and then the System/390 in the 1990s, the IBM mainframe stood apart from the crowd for its Reliability, Availability and Serviceability (RAS) and power…

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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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