Fwd: Re: Regional differences in P2P
"My interpretation of this is that p2p networks are quite
intelligent in using the available bandwidth, and that
Copyright holders only solution is a "content crunch" due to
providers limiting their users upload potential due to heavy
usage, such as capping the amount of bandwidth allowed per
month or alike."
Kristian
---------- Forwarded Message ----------
Subject: Re: Regional differences in P2P
Date: Thursday 15 July 2004 11:25
From: Mikael Abrahamsson <swmike@xxxxxxxxx>
To: nanog@xxxxxxxxx
On Thu, 15 Jul 2004, Sean Donelan wrote:
> Apparently CacheLogic based most of their conclusions on data
> collected from a European "tier 1" ISP. However, another
> study by Sandvine found regional differences in file sharing
> networks. Europe and the US don't have the same file sharing
> patterns, or even popular file sharing programs.
I would also like to add that over here Direct Connect is quite
common among the more organized and hard-core file swappers,
while the really-hardcore guys of course are still using
private ftp servers.
With proliferation of 10 meg ethernet (full duplex) connections
for residential use in (especially) northern europe and in
asia, users are more likely to serve content to other users
around the world.
I have made some studies regarding the bandwidth usage pattern
between equal size populations where the difference is if they
have ADSL 8M/800k or if they have 10M/10M. The amount of data
served is 1/3rd on ADSL compared to the symmetric ethernet
population, and as a population they serve out more content
than they download (approx twice the amount) on ethernet. The
ADSL population peak at approx twice the bw as they serve, but
on average they serve a little less than they download.
Hmm, the above wasn't very clear, but here it goes in another
format:
Ethernet:
Peak almost twice upload as download.
Average is 2.5-3 times more upload than download.
ADSL 8M/800k:
Peak twice the amount download as upload
Average is 1.3-1.5 more download than upload
Upload bw usage is almost flat over time
Download bw peak is approx double the average level.
My interpretation of this is that p2p networks are quite
intelligent in using the available bandwidth, and that
Copyright holders only solution is a "content crunch" due to
providers limiting their users upload potential due to heavy
usage, such as capping the amount of bandwidth allowed per
month or alike.
--
Mikael Abrahamsson email: swmike@xxxxxxxxx
-------------------------------------------------------
--
Kristian Köhntopp
Senior Security Engineer
Comwin: http://comwin.name/kris@xxxxxxxxxxx
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