Termos e Definições - E

ESCON (or Enterprise Systems Connection) is an optical serial interface between IBM mainframe computers and peripheral devices such as storage and tape drives. ESCON is capable of half-duplex communication at a rate of 17 MB/second over distances of up to 43 kilometers. ESCON was introduced by IBM in 1990 to replace the older,slower, copper-based Bus & Tag channel technology of 1960-1990 era mainframes. The substantially faster FICON channel, which runs over Fibre Channel, is in turn supplanting ESCON.
A high-speed fiber-optic serial channel for IBM's ES/9000 processors, introduced in 1990. ESCON was initially based in part on a fiber-optic link operating at a speed of 200 megabits per second (Mbps) regardless of the driver light source, but has been driven much faster.

EBCDIC (Extended Binary-Coded Decimal Interchange Code)
An IBM-developed code designating a standard table of alphanumeric characters, similar to (and now largely eclipsed by) American Standard Code for Information Interchange (ASCII). See ASCII.

EHLLAPI (Emulator High-Level Language Application Program Interface)
An IBM mainframe application programming interface.

EJB (Enterprise JavaBeans)
A specification for building server-side, transactional Java-based components. It was developed by Sun Microsystems in collaboration with IBM, Netscape, Oracle and other vendors. See Java.

ESA (Enterprise Systems Architecture)
A 31-bit mainframe architecture introduced by IBM in the 1980s, employed in mainframe hardware such as the ESA/370 and ESA/390, and in operating systems such as Multiple Virtual Storage/ESA (MVS/ESA), Virtual Storage Extended/ESA (VSE/ESA) and Virtual Machine/ESA (VM/ESA). In 2000, IBM introduced a 64-bit successor to ESA called z/Architecture. See MVS, VSE, VM and z/Architecture.

ESS (Enterprise Storage Server)
A disk storage subsystem from IBM.

event management system
A system designed to reduce enterprises' capital equipment and training costs by consolidating the number of network and system management consoles with which operators must interact. An event management system enables events from disparate enterprise network devices, hardware systems, middleware and applications to be monitored from one console. Examples include BMC Software's Patrol, IBM's Tivoli Enterprise Console and Micromuse's Netcool.

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