XParc's Report on Gnutella

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From: Tom Whore (tomwhore@inetarena.com)
Date: Wed Sep 20 2000 - 10:10:24 PDT

Recent days have shown that the modem barrier is slamming the gnutella net
almost as much as the report below. I dont remeber this being forked
before so here it goes


Free Riding on Gnutella
Eytan Adar and Bernardo A. Huberman
Internet Ecologies Area
Xerox Palo Alto Research Center
Palo Alto, CA 94304


An extensive analysis of user traffic on Gnutella shows a
significant amount of free riding in the system. By sampling messages on
the Gnutella network over a 24-hour period, we established that nearly 70%
of Gnutella users share no files, and nearly 50% of all responses are
returned by the top 1% of sharing hosts. Furthermore, we found out that
free riding is distributed evenly between domains, so that no one group
contributes significantly more than others, and that peers that volunteer
to share files are not necessarily those who have desirable ones. We argue
that free riding leads to degradation of the system performance and adds
vulnerability to the system. If this trend continues copyright issues
might become moot compared to the possible collapse of such systems.

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