[metrics-bugs] #18167 [Metrics/Statistics]: Don't trust "bridge-ips" blindly for user number estimates

Tor Bug Tracker & Wiki blackhole at torproject.org
Sat Mar 28 09:19:54 UTC 2020

#18167: Don't trust "bridge-ips" blindly for user number estimates
 Reporter:  karsten             |          Owner:  metrics-team
     Type:  defect              |         Status:  needs_review
 Priority:  Medium              |      Milestone:
Component:  Metrics/Statistics  |        Version:
 Severity:  Major               |     Resolution:
 Keywords:  meek, metrics-2018  |  Actual Points:
Parent ID:                      |         Points:
 Reviewer:                      |        Sponsor:
Changes (by karsten):

 * status:  assigned => needs_review


 Let's finally make this fix. Last time I suggested to wait for #8786 and
 #18203. It turns out that we're not going to do #8786, and I just added a
 patch to #18203 to do it together with this fix.

 I reprocessed past Decembers and made a comparison graph to the currently
 deployed code:

 [[Image(bridge-users-2020-03-28.png, 700px)]]

 This graph shows that total numbers and numbers by transport (here: meek)
 stay the same. But some numbers by country change, with user numbers from
 China going up most and user numbers from Turkey going down most. The
 numbers in red are more likely to be correct.

 Please review [https://gitweb.torproject.org/user/karsten/metrics-
 commit 31868ee in my tasks-18167-and-18203 branch].

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18167#comment:10>
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