[tor-project] The tor network is constrained by.... (meek, exits, etc)
karsten at torproject.org
Tue Jan 17 16:11:12 UTC 2017
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On 10/01/17 20:13, Tom Ritter wrote:
> I am continually getting asked this question and then asked to back
> it up. I'm hoping the metrics team might be able to guide me
I'll give this a try, but I wouldn't say that the metrics team is your
best bet here. We're busy providing all the data, but we're spending
way less time on looking at it than you would expect.
> Firstly, while we don't have (public) datasets showing this, I am
> fairly certain that the public meek bridges have their bandwidth
> capped (to limit costs) and raising that cap would directly
> improve the speed of meek users. (Implying that the bottleneck the
> majority of the time is the meek transport.) Right?
That's also my intuition, but I don't have the data you're looking
for. David would know better.
> Secondly, I know it's too simplistic to say "Our exits are
> operating at 85% of capacity, our guards are 65% and our middles at
> 40%" (for a host of reasons, including guard/middle overlap) but
> how close can we get to something simple that demonstrates more
> exits will help the (non-bridge) network the most? (If that is in
> fact the case!)
I don't know an easy answer to this, but you could look at consensus
bandwidth weights for a start:
The latest consensus bandwidth weights are:
bandwidth-weights Wbd=0 Wbe=0 Wbg=4127 Wbm=10000 Wdb=10000 Web=10000
Wed=10000 Wee=10000 Weg=10000 Wem=10000 Wgb=10000 Wgd=0 Wgg=5873
Wgm=5873 Wmb=10000 Wmd=0 Wme=0 Wmg=4127 Wmm=10000
If you go add many more guards or exits, you should observe how those
You could also ask Mike for more details.
> I might have more questions to relay, but for now these seem to be
> the main ones.
Sounds good. You should also ask relay operators on the tor-relays@
mailing list. Though asking on this list is a good start, too.
All the best,
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