Ifric12

14688 mots 59 pages
Experiences with the Amoeba Distributed Operating System
Andrew S. Tanenbaum Robbert van Renesse1 Hans van Staveren Gregory J. Sharp Dept. of Mathematics and Computer Science Vrije Universiteit De Boelelaan 1081 1081 HV Amsterdam, The Netherlands Internet: ast@cs.vu.nl, cogito@cs.vu.nl, sater@cs.vu.nl, gregor@cs.vu.nl Sape J. Mullender 2 Jack Jansen Guido van Rossum Centrum voor Wiskunde en Informatica Kruislaan 413 1098 SJ Amsterdam, The Netherlands Internet: sape@cwi.nl, jack@cwi.nl, guido@cwi.nl

The Amoeba distributed operating system has been in development and use for over eight years now. In this paper we describe the present system and our experience with it—what we did right, but also what we did wrong. Among the things done right were basing the system on objects, using a single uniform mechanism (capabilities) for naming and protecting them in a location independent way, and designing a completely new, and very fast file system. Among the things done wrong were having threads not be pre-emptable, initially building our own homebrew window system, and not having a multicast facility at the outset. Computing Reviews categories: C.2.4, D.4 Keywords: Operating systems, Distributed systems, Distributed operating systems, Computer networks, Experience Descriptors: Network operating systems, Distributed applications, Distributed systems, Measurements General terms: Design, Experimentation, Performance
1. This research was supported in part by the Netherlands Organization for Scientific Research (N.W.O.) under grant 125-30-10. ¡¡¡¡¡¡¡¡¡¡¡¡¡

-2INTRODUCTION The Amoeba project is a research effort aimed at understanding how to connect multiple computers together in a seamless way [15, 16, 26, 28, 32] The basic idea is to provide the users with the illusion of a single powerful timesharing system, when, in fact, the system is implemented on a collection of machines, potentially distributed among several countries. This research

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