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Server Construction That Replaced Mainframes Still Effective

svrcnCorporations are moving to multiprocessor servers from two directions. Some are stepping down from outdated and expensive mainframe environments, while others are stepping up from the slightly souped-up PCs they’ve been using as file servers.

Either way, buyers seek out power, scalability and fault tolerance, though not necessarily in that order.

“Super” servers flex their multiple processors in one of two architectures. Asymmetric multiprocessing dedicates each processor to a specific task. In symmetric multiprocessing, a more advanced and costlier technology, tasks are distributed to whichever processor is available.

But some network operating systems, most notably Novell Inc.’s NetWare, do not support more than one processor. So compatibility with network operating systems is as important to super-server buyers as multiprocessing power is.

As part of its conversion from an IBM 4381 mainframe to a networked-PC environment, The Dr. Pepper Bottling Co. of Texas has purchased …

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Computers Aren’t The Math Wizards We Think They Are

catmwThe myth of the computer’s math prowess runs so deep that it’s even built into the name. The verb “compute” comes originally from a Latin root that means “to think,” but during the last 400 years the English word “computation” has become almost synonymous with doing arithmetic.

The less we know about computers, the more likely we are to think of them as giant math machines — a belief that leads to excessive trust in computers’ mathematical abilities, despite their potential for making fundamental errors. As with almost every kind of computer problem, these errors are a result of the decisions made by programmers seeking to find the best combination of low cost, high speed and accuracy of results.

Such trade-offs are impossible to avoid, but it’s important for both the application developer and the user to be aware that such decisions are being …

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Early Multiprocessing: A Killer App

mpgWhile lack of software support for multiprocessing has deterred buyers from investing in expensive multiprocessing servers, Schatt and other analysts forecast better days ahead. The proliferation and expansion of LANs and the demands of the mission-critical applications running on them will spur buyers and advance the market over the long run, they said.

“I think the important factor is to look at the big picture. Downsizing [and] enterprise networking [are] definitely going to be a force,” Schatt said. “Probably 1994 will be the year of the super server. We’ll see significant growth in 1993 and 1994.”

According to Schatt, overly optimistic expectations have contributed to the perception that the market has not fulfilled its promise. Market researchers had estimated a $600 million to $700 million market by now, Schatt said, “and it’s not. It’s a $400 million market.”

The sagging economy is one reason …

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CDPD: It Died So Faster Cell Service Could Live

cdpdNearly 100 years after Guglielmo Marconi successfully transmitted and received electronic signals via his wireless telegraphic invention, a budding wireless network is poised to become the mobile data transmission route of the future.

The Cellular Digital Packet Data (CDPD) network is designed to let cellular subscribers send digital data from mobile PCs over existing cellular networks. Mixing a myriad of technologies, including the ability to send packets of data over cellular airwaves instead of traditional analog transmission, CDPD could provide PC users with quick and reliable data transmission, analysts said.

“CDPD is going to happen and it will be a tremendous challenge for RAM [Mobile Data Inc.] and Ardis,” said Paul Callahan, senior industry analyst for Forrester Research Inc., a market-research firm in Cambridge, Mass. “When it’s available, CDPD will basically be as cheap as [RAM Mobile’s] Mobitex or Ardis’ on-line service charge, and …

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Things To Consider With Data Recovery Services

Have you ever wondered how you can recover files that have already been lost due to problems with your computer or hard drive? This is indeed a frustrating scenario especially if those files are very important. If you want to retrieve your files, one thing you can do is hire an expert as they can do the job without running the risk of damaging your hard drive. Aside from find out about the data recovery services cost, you also need to obtain additional information such as the number of years the company has been operating and their reputation. The data recovery services cost is not enough as there are still some information that will serve as determining factor of the company’s effectiveness.

disk-recovery-and-repairYou should expect the data recovery services cost to be a bit expensive because the job is not going to be easy. However, if the company can really be trusted, the price will never be an issue. Ask questions so you will have an idea if you are dealing with the right company. They should also provide you some ideas about the techniques they are going to use. It is important that you ask for some references for you to find out about their previous accomplishments. Read more…

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