nanog mailing list archives

Re: P2P agents for software distribution - saving the WAN from meltdown?!?


From: Stephane Bortzmeyer <bortzmeyer () nic fr>
Date: Wed, 18 Jun 2008 17:21:42 +0200

On Wed, Jun 18, 2008 at 10:52:38AM -0400,
 Joe Abley <jabley () ca afilias info> wrote 
 a message of 41 lines which said:

The behaviour I have observed with BitTorrent is that clients are
handed a relatively short list of potential peers by the tracker,
and it's quite common for sensible, close, local peers not to be
included. My assumption has been that the set of potential peers
passed to the client is assembled randomly.

I did not check seriously so I cannot confirm or deny but do note that
there are several proposals to improve "peer selection" behind random
sorting or crude measurements with ping on a few hosts. A summary of
existing work is on the ALTO Web site
<http://alto.tilab.com/resources.html>.

ALTO will have a BoF session at the next IETF in Dublin, so we may see
one day a standard protocol for peer selection.




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