Английская Википедия:Amoeba (operating system)

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Шаблон:Short description Шаблон:Infobox OS Amoeba is a distributed operating system developed by Andrew S. Tanenbaum and others at the Vrije Universiteit Amsterdam. The aim of the Amoeba project was to build a timesharing system that makes an entire network of computers appear to the user as a single machine. Development at the Vrije Universiteit was stopped: the source code of the latest version (5.3) was last modified on 30 July 1996.[1]

The Python programming language was originally developed for this platform.[2]

Overview

The goal of the Amoeba project was to construct an operating system for networks of computers that would present the network to the user as if it were a single machine. An Amoeba network consists of a number of workstations connected to a "pool" of processors, and executing a program from a terminal causes it to run on any of the available processors, with the operating system providing load balancing.[3] Unlike the contemporary Sprite, Amoeba does not support process migration.[4] The workstations would typically function as networked terminals only. Aside from workstations and processors, additional machines operate as servers for files, directory services, TCP/IP communications etc.[3]

Amoeba is a microkernel-based operating system. It offers multithreaded programs and a remote procedure call (RPC) mechanism for communication between threads, potentially across the network; even kernel-threads use this RPC mechanism for communication. Each thread is assigned a 48-bit number called its "port", which serves as its unique, network-wide "address" for communication.[3]

The user interface and APIs of Amoeba were modeled after Unix and compliance with the POSIX standard was partially implemented; some of the Unix emulation code consists of utilities ported over from Tanenbaum's other operating system, MINIX. Early versions used a "homebrew" window system, which the Amoeba authors considered "faster ... in our view, cleaner ... smaller and much easier to understand", but version 4.0 uses the X Window System (and allows X terminals as terminals).[3] The system uses FLIP as a network protocol.

See also

References

Шаблон:Reflist

External links

Шаблон:Distributed operating systems Шаблон:Microkernel

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  1. ↑ Ошибка цитирования Неверный тег <ref>; для сносок ftp не указан текст
  2. ↑ Шаблон:Cite web
  3. ↑ 3,0 3,1 3,2 3,3 Andrew S. Tanenbaum, M. Frans Kaashoek, Robbert van Renesse and Henri E. Bal (1991). The Amoeba distributed operating system — a status report. Computer Communications 14.
  4. ↑ Fred Douglis, M. Frans Kaashoek, Andrew S. Tanenbaum and John Ousterhout (1991). A comparison of two distributed systems: Amoeba and Sprite. Computing Systems 4(4), pp. 353–384.
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