Latest Entries

CICS has undergone many changes since its inception more than 30 years ago. During that time, IBM has continually enhanced the product and enabled it to exploit new features in the underlying operating system and in other subsystems running alongside CICS. IBM has also restructured various components within CICS during its lifetime. Since the days of CICS/ESA Version 3, the internal structure of CICS has been managed by a series of domains. A domain is similar to the concept of a class in object-oriented programming languages, as it has clearly defined interfaces and executable code, and is responsible for managing any data that relates to that particular component. This encapsulation of data and function helps improve the reliability, extendibility, and serviceability of the product as a whole. Since CICS/ESA Version 3, different components of CICS have been restructured into their own domains. The CICS Log Manager is one such component. It was introduced in the first release of CICS Transaction Server Version 1 and replaced the older journal control management programs.

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“PLATUNE”: Taking Back the Data Center

It was the worst ever. Month-end was here and they had laid siege to us. Egad! Now I know how they felt at Dunkirk. We fell back to the machine room. They charged, lobbing jobs at us at horrific rates. “Who is it?” cried management. “It’s the ad hoc users,” we replied, “and a cohort of developers on our flank!” Management turned and ran. “OK, men,” I rallied. “It’s up to us now. We’re going to take back the data center!”…

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IT Sense: Truth in Advertising

About every decade or so, there is a brief flirtation in this country with ideas like “open-door politics,” “government in the sunshine,” and “truth in advertising.” What happens, basically, is that an organization engaged in selling something—whether it be an idea, a political candidate, a product, or an image—discerns a “climate of mistrust” within the buying community. It may not be mistrust of the vendor per se, but of all vendors, or of the system in which they operate…

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Like most people, I’m a sucker for a compliment. So, when I received one via e-mail in response to my June/July column on “Ethical Computing,” I had no choice but to respond to the writer of those kind words. She wanted to know whether I had ever seen a job description for a business solution integrator. I told her that I had not, but that this would make a good topic for a future column, so here we go…

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It’s often a challenge to come up with an efficient architecture for running WebSphere applications on Linux for zSeries. Such systems consist of zSeries mainframes running VM and multiple Linux guests, each running WebSphere and customer applications. With all of these components involved, it gets a little complicated ensuring that everything works together optimally. This article provides the basics you need to get started as well as additional references…

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Licensing Software for Capacity on Demand

In recent years, awareness of capacity on demand (CoD) and utility computing has increased significantly. Many hardware manufacturers provide systems with variable hardware capacity, which allows customers to purchase base capacity and request additional capacity when needed to satisfy their “on-demand” needs. By their variable-capacity nature, these systems have strained standard software licensing models, especially those that are capacity-based. This article examines these strains and proposes a solution that will allow software vendors to license software in a simple, equitable way, while addressing customer needs.

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Has Open Storage For zSeries Finally Arrived?

What’s old yet new, black and not blue, supports Linux, FICON, and open storage interfaces, too? Well that would be an IBM zSeries mainframe. I recently saw an interesting cartoon that showed Unix being squeezed out by Windows and Linux environments. Also in this cartoon were the banners of other ousted systems and technologies, including mainframes. While Unix was long hailed as the operating system that would put the final nail into the mainframe’s coffin, it is clear that the zSeries processor family is very much alive as are z/OS and Linux. This article examines how various open interfaces and technologies coexist and are part of a zSeries environment today that is very much alive…

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