> On 14 Dec. 2016, at 22:42, Andreas Krey <a.k...@gmx.de> wrote: > > On Wed, 14 Dec 2016 21:43:28 +0000, teor wrote: > ... >> The bwauth calculations do take latency into account, and they should: >> if CPU usage or bandwidth are near their limit, the latency through the >> relay will be high. > > I stand corrected. > > I observed my relays (a few years ago) to often run into the bandwidth limit, > aka 'flatlining', and this having latency. I then started to set lower > advertised bandwidth, and this went away. Problem here is that these are > short-term event in relation to the bandwidth probes, so the probing > can't really control this. > > ... >> This has the drawback that relays located away from the US/Western >> Europe get poor scores. > > What kind of latencies are we talking about here? And how much > latency makes up for what bandwidth?
That's a really good question, the following factors interact: * bandwidth, * network peering, * latency. I don't know the answer, but in my experience, an Exit relay located in France picked up bandwidth extremely quickly (peak in 4-5 months), one in Canada was a little slower (6 months and still at 60% or so) and some non-Exit relays in Australia are operating at 10% of capacity. (They don't all have the same bandwidth, so it's not a fair comparison.) I'd have to ping each of the bwauths from each relay to be sure of the latencies, but as an example: To moria1: France: 94 ms Australia: 245 ms To gabelmoobwscan: France: 15 ms Australia: 340 ms Note that it takes several round-trips to set up a TCP connection, and more round-trips to set up a Tor circuit (and acknowledge cells). T -- Tim Wilson-Brown (teor) teor2345 at gmail dot com PGP C855 6CED 5D90 A0C5 29F6 4D43 450C BA7F 968F 094B ricochet:ekmygaiu4rzgsk6n xmpp: teor at torproject dot org ------------------------------------------------------------------------ _______________________________________________ tor-relays mailing list tor-relays@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays
