Exploring IBM Eserver Zseries and S/390 Servers: See Why by Steve Krantz

By Steve Krantz

Thought of the bible of the IBM zSeries and S/390 international, this new version heavily examines the position huge desktops will play within the new century. the entire new versions and working method products-Linux, VSE, MVS, VM, AIX, and Open Edition-are now on hand for the zSeries and are absolutely defined, as are severe company concerns equivalent to fee justification, rent as opposed to buy, help, safety, and upkeep. Hypothetical small, medium, and massive companies are defined after which built with the ideal zSeries solution.Author Biography: Jim Hoskins was once an IBM layout engineer and supervisor and is the writer of 10 computing device books, together with exploring IBM expertise, items & prone. He lives in Gulf Breeze, Florida. Bob Frank was once the IBM product supervisor for what's now the server workforce zSeries and S/390. He lives in Tampa, Florida.

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ESCON is a set of rules that define how I/O devices—such as storage subsystems, control units, or communications controllers—are attached to processors in the ESA/390 architecture. ESCON employs fiber-optic cables, which carry light waves (photonics) rather than the traditional electrical signals (electronics) used in System/370 channels. The use of photonics allows for higher speed information flow between I/O devices and the channel subsystem. Further, the use of photonics allows I/O devices to reside from 3 km to 60 km away from the processor unit, depending on the I/O device, the ESCON channel type, and the cabling configuration.

These new models reduced the overall cost of computing for businesses while providing them with greater flexibility. In April 1994, IBM added three configurations to the System/390 family, moving the System/390 into the world of parallel processing. In these configurations, System/390 microprocessors were installed in Central Electronic Complexes (CECs) that were clustered in frames designed to hold from one to eight CECs. Each CEC supported two to six System/390 microprocessors. The new configurations were the System/390 Parallel Transaction Server (9672), the Coupling Facility (9674), and the System/390 Parallel Query Server (9673).

An example of the recent IBM– Siebel relationship will be described in Chapter 4. The third and last pillar is the use of innovative technology, which drives leading server performance. The evolution of e-business is predicated on the need for optimized performance to ensure higher user value as has been done with traditional back-office applications, new front-office applications, Web applications, and network management applications. IBM’s answer to this requirement is clearly seen in the eServer family of products.

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