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[ARSCLIST] Brian Frank Cooper: Information Preservation in Networks of Autonomous Archives
Information Preservation in Networks of Autonomous Archives
From: Brian Frank Cooper <cooperb@xxxxxxxxxxxx>
Reply-To: p2p-hackers@xxxxxxx
To: students@xxxxxxxxxxxxxxx, faculty-all@xxxxxxxxxxxxxxx
Subject: [p2p-hackers] Thesis defense - 2/28/2003, 9am
Resent-Date: Thu, 13 Feb 2003 15:57:21 -0800
======================================================================
Special University Oral Examination
Information Preservation in Networks of Autonomous Archives
Brian Frank Cooper
PhD Candidate
Computer Science Department
Stanford University
Friday, Feb 28, 9:00 - 10:00 am
Room 104, Gates Computer Science
(Refreshments will be served at 8:45 am)
======================================================================
An ever increasing amount of information is being stored digitally, and
people are becoming more and more dependent on it. However, very little
is understood about how to preserve digital information for long time
periods. Media failures, natural disasters and bankruptcy all conspire to
cause information loss over decades or centuries. Such failures rob future
generations of vital scientific and cultural artifacts.
To deal with these problems, we have developed a distributed digital
archive that is based on the concept of multiple autonomous archives
cooperating to provide preservation. For such a system to effectively
preserve data for the long term, it must be as self-supervising as
possible. Moreover, the system should be structured so that autonomous
archives have an incentive to collaborate and share resources.
Replication in our system is based on archives trading data under the
principle of "I'll preserve your data if you preserve mine." These trades
result in an archive network that self-organizes into a reliable system,
self-tunes to improve efficiency, and self-heals after a failure. I'll
discuss the architecture of the system, and techniques for making trades
to achieve the highest reliability. Once data is replicated, there must be
an efficient and robust mechanism to allow users to find important
documents. Using a simple model of peer-to-peer search networks, we have
discovered new and interesting network topologies, and also developed
techniques for ad hoc networks, where a network can self-organize and
self-tune to produce an efficient topology without external supervision.
--
Brian Cooper
PhD Candidate, Department of Computer Science, Stanford University
cooperb@xxxxxxxxxxxx http://www-db.stanford.edu/~cooperb/
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