BitTorrent swarms have a deadly bite on broadband nets (fwd)

[Gadi Evron <ge () linuxbox org>]

---------- Forwarded message ----------
Date: Sun, 21 Oct 2007 13:03:11 -0400 (EDT)
From: Sean Donelan <sean () donelan com>
To: nanog () merit edu
Subject: BitTorrent swarms have a deadly bite on broadband nets



http://www.multichannel.com/article/CA6332098.html

  The short answer: Badly. Based on the research, conducted by Terry Shaw,
  of CableLabs, and Jim Martin, a computer science professor at Clemson
  University, it only takes about 10 BitTorrent users bartering files on a
  node (of around 500) to double the delays experienced by everybody else.
  Especially if everybody else is using "normal priority" services, like
  e-mail or Web surfing, which is what tech people tend to call
  "best-effort" traffic.

Adding more network bandwidth doesn't improve the network experience of other 
network users, it just increases the consumption by P2P users. That's why you 
are seeing many universities and enterprises spending money on traffic shaping 
equipment instead of more network bandwidth.
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