On Mon, 8 Nov 2004 17:36:53 +0100, Daniel Roesen <dr@xxxxxxxxxx> wrote: > On Mon, Nov 08, 2004 at 11:21:55AM -0500, William Hooper wrote: > > > doesn't bittorrent work better when there are more people using it? > > > shouldn't everybody be using the same torrent? > > > > In theory, yes everybody should be using the same torrent. In practice, > > though, having a torrent for two geographical locations (one Americas, one > > Europe) prevents your torrent client from having to go over the slow, > > across the ocean links. > > The problem are not "slow transoceanic links" per se as I hardly > experience any congestion issue on those nowadays. > > The problem is the delay those longhaul links generate, and thus > limit TCP performance massively. > > Ever seen FTP with more than about 3mbit/s transatlantic? No? This is > NOT because of a lack of bandwidth! > > So the aim of seperating trackers is not avoiding small bandwidth links, > but high RTT (delay) links, which directly affects TCP performance. I understand what you are saying. But, isn't it that the link delay doesn't matter for large transfers? For large transfers, the link delay is just reflected as the startup time. So, an 'n' mbps link whether it is transatlantic or close-by would almost take the same time to transfer data for _large_ files/streams. So, I think its congestion that justifies having seperate trackers. -- Uday > > Best regards, > Daniel > > -- > CLUE-RIPE -- Jabber: dr@xxxxxxxxxx -- dr@IRCnet -- PGP: 0xA85C8AA0 > > > > -- > fedora-test-list mailing list > fedora-test-list@xxxxxxxxxx > To unsubscribe: > http://www.redhat.com/mailman/listinfo/fedora-test-list >