Latest Entries

The Case for Enterprise Extender

For many years, IBM front-end processors (3705, 3725 and 3745) have been at the heart of most Wide Area Networks (WANs). However, time is running out for this aging survivor from the days when networks were SNA from the desktop to the data center. IBM announced its withdrawal from marketing in 2002, and indicated support would be withdrawn in 2007. This fact alone should be enough to ensure organizations worldwide have developed and agreed upon a strategy to remove their dependencies on the 3745. Indeed, some organizations do have such a strategy and have largely executed it, while others have gone through some measure of 3745 consolidation. This usually means the remaining 3745s are located in the data center, which simply increases the impact of a 3745 failure and does nothing to remove the dependency. Unfortunately, there are others who have, thus far, taken a wait-and-see approach, maybe arguing that IBM withdrew support for 3725 years before the last 3725 was taken out of production; therefore, there’s no rush to remove the 3745. After all, they may be trying to justify that it’s fully depreciated, it works and if it isn’t broke, don’t fix it. Well, this line of thinking is very wrong…

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FlashCopy is an IBM microcode-based technology that comes as an add-on feature to the more advanced IBM DASD subsystems. Other DASD manufacturers typically have similar capabilities under different names. This technology lets the DASD subsystem handle some of the data movement task rather than relying on the operating system or programs. FlashCopy is a useful utility for backing up databases and moving large volumes of data quickly at a DASD volume level. FlashCopy Version 2 introduces data set level copy…

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The Workload Manager (WLM) discretionary goal type can be an effective, but sometimes risky, goal to assign your workloads. In some cases, work runs most efficiently when it’s assigned a discretionary goal. Other times, work assigned a discretionary goal may not run at all. Like all other aspects of WLM, there are many nuances to the discretionary goal control. This article explores some of these nuances and provides background, insights, and recommendations on how to optimize your use of this goal type…

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Using the CICS Transaction Gateway

With more than 70 percent of the world’s data stored on mainframe computers, it’s probably a fair bet the vast majority of that data is accessible by CICS programs. The programs that comprise CICS applications throughout the world have evolved over dozens of years, changing as business needs or user requirements dictate. Not only do the CICS programs access the data, they also contain the rules that define how your business uses the data and what the relationships are between how the business works and the data stored in the files and databases…

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Business Networking: Penguins and Dinosaurs

In our December/January 2004 z/Journal article, “Jurassic Networking: SNA Applications in an IP World,” we examined SNA and its place in the current business environment. We introduced the Communications Server (CS) for Linux on zSeries product, which enables branch consolidation and infrastructure simplification. In this article, we will explore how your business can exploit your existing SNA applications by using Linux and zSeries to isolate SNA traffic to the data center and fully enable IP network technology elsewhere…

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I must admit I was a little sad to hear about the takeover of Candle by IBM. I know there is a tendency in the Independent Software Vendor (ISV) sector for smaller players to be swallowed up by the big fish, and the result can be positive for customers—if the acquisition guarantees the future of a vulnerable product or assists with cross-vendor integration. (Of course, takeovers can also be disastrous for product support, but I don’t imagine IBM will struggle to fulfill existing commitments!)…

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Open Access to IMS With ODBA and OTMA

IMS, IBM strategic database software using hierarchical database technology to support high-transaction volumes, provides reliable and high throughput for more than 95 percent of Fortune 1000 companies. IMS is comprised of two major components: the Database Manager (IMS DB) and Transaction Manager (IMS TM). Together, they create a complete online database transaction- processing environment, providing continuous data availability and data integrity…

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