Re: Re: TCP vs. UDP
Olaf van der Spek <[email protected]> Tue, 22 Mar 2005 20:58:38 +0100
| Newsgroups | gmane.network.bit-torrent.general |
|---|---|
| Message-ID | <[email protected]> |
larytet wrote: > > 20% of peers has connection with latency above 300ms > Another problem is geographical location of peers. Peers tend to > establish connections randomly creating unnecessary burden for ISPs. > > from the article:"Our interest in latencies of the peers is due to the > well known feature of TCP congestion control which discriminates > against flows with large round-trip times. > This, coupled with the fact that the average size of files exchanged is > in the order of 2-4 MB, makes latency a > very important consideration when selecting amongst multiple peers > sharing the same file." > > Amazingly there are peers with 1s latency and more. Clearly these are > peers behind dial ups with large TCP packets in downstream queue > waiting for delivery. > > The article contains lot of usefull statistics. I thought that there > are people who did not read it and would be interested in reading it. That's certainly true, but I couldn't find the TCP vs UDP bit. > --- In [email protected], Olaf van der Spek <OvdSpek@L...> wrote: > >>larytet wrote: >> >>>this article is interesting >> >>Where does it discuss TCP vs UDP? >>And how is the article relevent to BT? >> >> >>>http://www.utsc.utoronto.ca/~rosselet/cscd58/ref05/p2p-measure.pdf >>>related to Napster/Gnutella, some measurements of connection latency >>>and available bandwidth. >>> >>> >>> >>> >>> >>> >>>Yahoo! Groups Links >>> >>> >>> >>> >>> >>> >> >> >>-- >>Olaf van der Spek >>http://xccu.sf.net/ > > > > > > > > Yahoo! Groups Links > > > > > > -- Olaf van der Spek http://xccu.sf.net/ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/BitTorrent/ <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/