David Barrett: > Has anyone else had good experience trying to > measure this automatically in the real world?
If you can accurately measure RTT, and accurately compute a transmit window from observed loss the same way that TCP does, then you have all the raw data necessary to know what the available bandwidth for a TCP-friendly flow was over the last RTT. And since you should be TCP-friendly, that bandwidth is in fact the "available bandwidth", even if slightly more (or MUCH more, if the loss isn't from congestion) actually exists. And since you can't predict the future, and overall congestion and loss varies much more rapidly than you might expect, you can't do any better than knowing the past. Within one RTT, if you do it right... Worse, if you're trying to calculate it from longer-term observations like algorithm-based TFRC does. Matthew Kaufman [EMAIL PROTECTED] http://www.amicima.com _______________________________________________ p2p-hackers mailing list p2p-hackers@zgp.org http://zgp.org/mailman/listinfo/p2p-hackers _______________________________________________ Here is a web page listing P2P Conferences: http://www.neurogrid.net/twiki/bin/view/Main/PeerToPeerConferences
