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Re: [tor-bugs] #18167 [Metrics]: Don't trust "bridge-ips" blindly for user number estimates
#18167: Don't trust "bridge-ips" blindly for user number estimates
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Reporter: karsten | Owner:
Type: defect | Status: new
Priority: Medium | Milestone:
Component: Metrics | Version:
Severity: Major | Resolution:
Keywords: | Actual Points:
Parent ID: | Points:
Sponsor: |
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Comment (by karsten):
Replying to [comment:4 dcf]:
> Replying to [comment:3 karsten]:
> > Right, I agree that we shouldn't do (1) but only (2) and (3). The
following graph shows how this change would affect bridge users from China
and the U.S. and bridge users using meek. Does this graph look plausible
to you?
>
> Yes, it looks plausible to me.
Great, thanks for looking!
I'm trying to make another change or two to user number estimates (#8786,
#18203) before re-running the estimation algorithm on years of data. That
means it could take a few more weeks until the numbers on Metrics are
updated.
> Noticed how it smoothed out some of the wild fluctuations in cn in Dec
2015. I wonder if this is because when counting `"bridge-ips"`, the cn
count would semi-randomly switch between 0/''n'' and 1/''n'' of meek
users.
I think so, yes. See the following graph with fractions of `"bridge-ips"`
being resolved to cn:
[[Image(meek-bridges-2016-02-02.pngâ)]]
I think that explains the fluctuations.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18167#comment:5>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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