Am Mon, 19 Dec 2011 16:32:19 -0800 schrieb Mike Perry mikeperry@torproject.org:
Hi,
Just to be sure, I decided to shut off the experiment on Sunday at 3pm US Pacific time anyways. It looks like the performance has in fact gotten worse since then.
Does this mean the feedback was definitely working? Who the hell knows. But it does seem clear that the transition between the two states is definitely a rocky one that requires patience and repeated trials to sniff out.
Thats exactly what i meant. My impression is that the feedback seems to be working after all. Why do you want to investigate the transition any further ? If the feedback is finally working we probably don't need the transition in the future anymore :-)
I am going to leave it disabled for another week, just to see how it recovers, then turn it back on again, possibly with the addition of https://trac.torproject.org/projects/tor/ticket/4730 if I get a hot minute, but possibly without it, just to watch the transition again.
Robert Ransom is quite insistent on the need for this as well: https://trac.torproject.org/projects/tor/ticket/4708, but that system doesn't really need me to build it, as it can be done independent of the bwauths. I also think #4730 is more likely to capture the problem we were seeing with fast nodes being fast only sometimes, and it will be way less work.
Thanks for bearing with me, but we still might have a ways to go before we really get to the bottom of this one.
Its way less frustrating if you have at least a hunch. But if you are stuck in the middle of nowhere ...