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From: eugene@ames.UUCP (Eugene Miya)
Newsgroups: ba.general,net.arch
Subject: Seminar - NASA Ames Research Center
Message-ID: <489@ames.UUCP>
Date: Fri, 24-Aug-84 18:16:01 EDT
Article-I.D.: ames.489
Posted: Fri Aug 24 18:16:01 1984
Date-Received: Sun, 26-Aug-84 00:42:58 EDT
Organization: NASA-Ames Research Center, Mtn. View, CA
Lines: 34

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MOS: A Multicomputer UNIX Distributed System

Amnon Barak
Department of Computer Science
The Hebrew University of Jerusalem

This talk describes the goals and the architecture of MOS, a general-purpose
time-sharing distributed system which makes a set of independent computers
behave like a single UNIX system.
 
The main goals of the system are network transparency, decentralized control,
load balancing and concurrency through dynamic process migration.
The architecture is characterized by modularity, high degree of information
hiding and hierarchical organization.
 
We describe the load balancing policy which consists of three algorithms:
The local load, used by each node to monitor its own load;  the information
exchange algorithm, for exchanging load information between the nodes,
and the process migration algorithm which dynamically migrates processes, at
any stage of the execution.
 
The load balancing policy creates an environment which encourages concurrent
processing.  Some performance results of this policy will be given.

Date: Tuesday, August 28, 1984

Time: 10:00 am

Building N239 Room B39

Foreign visitors will require advanced clearance [we are next to a Navy Base].
Please send mail clearance requests to emiya@ames-vmsb.ARPA.  Sorry for
any inconvience, we are giving this on short notice ourselves.