[tor-relays] tor network "loses" ~50 relays/day due to bw auth problem

Tom Ritter tom at ritter.vg
Mon Jun 1 16:02:53 UTC 2015

Hrm.  So this gets into the inner workings of the bwauth system which
is... complicated.[0] Honestly, I'm not actually sure how the
individual data from the different bwauths is combined into a single
value for the consensus.

I'm not sure what the answer is for your problem, but I'm beginning to
wonder if the general approach to this problem is "There should be a
bwauth debugging mechanism similar to
https://consensus-health.torproject.org/ or (the unimplemented)
proposal 164."   I don't know if said mechanism would be a component
of atlas/globe or an entirely separate site, but if the bwauths
exported their hourly files, and this hypothetical tool aggregated
that data, it may help figure these things out.  It might give an
answer like "moria spazzed out and undervoted me, let me wait until it
scans me again."


[0] https://gitweb.torproject.org/torflow.git/tree/NetworkScanners/BwAuthority/README.spec.txt
[1] https://gitweb.torproject.org/torspec.git/tree/proposals/164-reporting-server-status.txt

On 31 May 2015 at 17:31, Jannis Wiese <mail at janniswiese.com> wrote:
> Hi operators,
> I believe especially the DirAuth/bwauth operators are working on this, but I would like to understand the ongoing issues.
> On my relay (8827944C4BDCBDAC9079803F47823403C11A9B7A), I see a decline in consensus weight fraction basically since May 14 (that's where the first drop in weight fraction occurred) and the same in traffic of course. The connections went down by more than 50% from 1500-1600 to now about 700 (total values). I did notice the strange peak in traffic yesterday, but it's now back to low levels. My relay is of course working nowhere near capacity (I have set up a RelayBandwithRate of 2MB and a Burst of 5MB) and I hope you understand that's a bit frustrating for me.
> At the moment I just see urras missing from the consensus and the measured entries of longclaw are quite a bit off the chart (I've subscribed to the consensus-health mailing list) - is that all what you need to have the tor traffic not distributed consistently (at least from my point of view) any more?
> Most importantly: Can I do something to help?
> Cheers,
> Jannis
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