@RUTGERS.ARPA:SASW@MIT-MC (04/20/85)
From: Steven A. Swernofsky <SASW@MIT-MC>
MSG: *MSG 3952
Date: 04/19/85 09:45:25
From: JOHN at MIT-XX
Re: SEMINAR
Received: from MIT-XX.ARPA by MIT-MC.ARPA; 19 APR 85 09:45:25 EST
Date: Fri 19 Apr 85 09:36:47-EST
From: John J. Doherty <JOHN@MIT-XX.ARPA>
Subject: SEMINAR
To: bboard@MIT-MC.ARPA
cc: john@MIT-XX.ARPA
SEMINAR
DATE: April 22, 1985
TIME: Refreshments 1:50 P.M.
Seminar 2:00 P.M.
PLACE: NE43-512A
COMPUTER COMMUNITIES SEMINAR SERIES
"A STATUS REPORT ON PROJECT ATHENA"
BY STEVEN R. LERMAN
Project Athena was officially begun in May, 1983. The program
has three major components. First, and foremost, Athena is an
educational experiment. Its primary goal is to encourage exploration of
new ways of using computation in the MIT curriculum, with a strong
emphasis on undergraduate subjects. The second component is technical.
In order to create a productive educational environment, Athena will
provide a large network of high performance workstations that present
both the user and the developer of educational software with a single
set of interfaces. the third element is logistical. Athena is engaged
in physically transforming much of the MIT campus to accommodate
workstations. this includes the creation of public work areas as well as
siting of equipment in dormitories, fraternities, laboratories,
classrooms, libraries and other parts of the Institute.
This presentation will review progress and plans in each of
these areas. Problems in achieving the project's various objectives will
be explored and discussed.@RUTGERS.ARPA:SASW@MIT-MC (04/30/85)
From: Steven A. Swernofsky <SASW@MIT-MC> MSG: *MSG 3987 Date: 04/29/85 09:31:53 From: JOHN at MIT-XX Re: SEMINAR Received: from MIT-XX.ARPA by MIT-MC.ARPA; 29 APR 85 09:31:53 EDT Date: Mon 29 Apr 85 09:33:27-EDT From: John J. Doherty <JOHN@MIT-XX.ARPA> Subject: SEMINAR To: bboard@MIT-MC.ARPA cc: john@MIT-XX.ARPA SEMINAR DATE: April 29, 1985 TIME: Refreshments 1:50 Seminar 2:00 PLACE: NE43-512A COMPUTER COMMUNITIES SEMINAR SERIES Xerox Grant Experiments at M.I.T. Prof. Thomas Malone M.I.T. Sloan School In the past year, under the Xerox University Grants Program, MIT has received 25 Dandelion workstations, with the following three software environments: Star, Interlisp-D, and Mesa/XDE (Xerox Development Environment) and associated file and print servers. This talk will describe the Xerox equipment, our plans for integrating it with the MIT computing environment, and the research projects currently underway by investigators in the Sloan School, Statistics Center, and Operations Research Center. The projects include: (1) an intelligent system for finding, filtering, and routing electronic mail and other documents, (2) an expert advisor for statistical analysis, (3) a distributed database system, (4) a network name server, (5) group decision-making experiments, and (6) interactive graphics tools for human-aided optimization.
SASW@MIT-MC.ARPA (12/07/85)
From: "Steven A. Swernofsky" <SASW@MIT-MC.ARPA>
MSG: *MSG 4790
Date: 12/06/85 11:38:31
From: LYALL at MIT-XX.ARPA
Re: Seminar
Received: from MIT-XX.ARPA by MIT-MC.ARPA 6 Dec 85 11:38:18 EST
Date: Fri 6 Dec 85 11:34:59-EST
From: Neena Lyall <LYALL@MIT-XX.ARPA>
Subject: Seminar
To: *mac@MIT-MC.ARPA
cc: lyall@MIT-XX.ARPA
Message-ID: <12164973450.26.LYALL@MIT-XX.ARPA>
Wednesday, December 11, 1985
2:15 Refreshments
2:30 Lecture
Room: NE43-512A
A DISTRIBUTED FILE SYSTEM FOR A NETWORK OF WORKSTATIONS
Paul Leach and Nathaniel Mishkin
(Apollo Computer)
The Apollo workstation supports a distributed file system based on the concept
of a "single-level store." Files are "objects" identified by 64 bit IDs that
are unique across all Apollo file systems. A process accesses an object's data
by mapping the object into the process's address space and making normal memory
references. The distinction between local and remote objects is known only to
the pager, which loads objects' pages on demand.
We will discuss several aspects of this architecture that we feel are crucial
to its success: a distributed lock manager, caching of object data, a
network-wide registry of users, and a distributed, replicated naming database
that is used to locate nodes based on name.
Conventional stream I/O (open, close, read, write, etc.) is provided by
"Streams." Streams can be used to access objects in the single-level store and
other objects that support the concept of stream I/O (e.g. tape drives,
terminal) I/O lines. Streams is object-oriented and extensible---the behavior
of Streams depends on the type of the object. Users can define new types of
objects and write managers that implement the stream operations for the new
type.
We will discuss the the principles behind Streams' extensibility and describe
how we see it being used as the mechanism for supporting file system
connections in a heterogeneous environment.
The Apollo distributed file system has been implemented on a 680x0
microprocessor-based workstation. Workstations are connected by a 12MB token
ring; rings can be connected by gateways to form an internetwork. All
workstations in the internet have equal access to the distributed file system.
The internet at Apollo Computer has over 1000 workstations.
Host: Professor Richard E. Zippel