|
The IBM System i is IBM's previous generation of midrange computer systems for IBM i users, and was subsequently replaced by the IBM Power Systems in April 2008. The platform was first introduced as the AS/400 (Application System/400) on June 21, 1988 and later renamed to the eServer iSeries in 2000. As part of IBM's Systems branding initiative in 2006, it was again renamed to System i. The codename of the AS/400 project was "Silver Lake", named for the lake in downtown Rochester, Minnesota, where development of the system took place. In April 2008, IBM announced its integration with the System p platform. The unified product line is called IBM Power Systems and features support for the IBM i (previously known as i5/OS or OS/400), AIX and GNU/Linux operating systems. ==Summary== The predecessor to AS/400, IBM System/38, was first made available in August 1979 and was marketed as a minicomputer for general business and departmental use. It was sold alongside other product lines, each with a different architecture (System/3, System/32, System/34, System/36). Realizing the importance of compatibility with the thousands of programs written in legacy code, IBM launched the AS/400 midrange computer line in 1988. AS stands for "Application System." Great effort was made during development of the AS/400 to enable programs written for the System/34 and System/36 to be moved to the AS/400. In 2000, in accordance with IBM's eServer initiative, the AS/400 series was rebranded as the eServer iSeries. In 2006, it was again rebranded as the IBM System i. In 2008, almost 20 years after being introduced, the System i and IBM System p product lines were combined into a new product line called the IBM Power Systems line. The AS/400 operating system was originally named OS/400 (following the pattern begun with OS/360 and followed with OS/2). The operating system has undergone name changes along with the rebranding of IBM's server lineup. The operating system was rebranded as i5/OS to correspond with the introduction of POWER5 processors and the rebranding of the hardware to eServer iSeries. For the 6.1 release, the operating system was again renamed to iBM i. The operating system is object-based. Features include a RDBMS (DB2/400), a menu-driven interface, support for multiple users, block-oriented terminal support (IBM 5250), and printers. It supports security, communications, and web-based applications which can be executed inside the optional IBM WebSphere Application Server or as PHP/MySQL applications inside a native port of the Apache web server.〔''(Zend Solutions for IBM i )''〕 Unlike the "everything is a file" feature of Unix and its derivatives, on OS/400 everything is an object (with built-in persistence and garbage collection). OS/400 offers Unix-like file directories using the Integrated File System.〔''(File Integrity Monitoring for iSeries (via Wayback Machine) )''〕 Java compatibility is implemented through a native port of the Java virtual machine. OS/400 Version 4, Release 4 (V4R4) introduced LPARs (logical partitions) allowing multiple virtual systems to run on a single hardware footprint. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「IBM System i」の詳細全文を読む スポンサード リンク
|