[tor-bugs] #28603 [Metrics/Statistics]: OnionPerf vantage points are not comparable

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#28603: OnionPerf vantage points are not comparable
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     Reporter:  irl                 |      Owner:  metrics-team
         Type:  defect              |     Status:  new
     Priority:  Medium              |  Milestone:
    Component:  Metrics/Statistics  |    Version:
     Severity:  Normal              |   Keywords:
Actual Points:                      |  Parent ID:
       Points:                      |   Reviewer:
      Sponsor:                      |
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 OnionPerf results look to be comparable over time, but between vantage
 points there are systematic deltas between the results. The "all" plots
 show rises and falls where they actually don't exist, it's just that a
 particular vantage point was offline so the average of the two remaining
 moves noticeably.

 We should work out how to have the aggregate value be resistant to the
 systematic delta due to the vantage point's location.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28603>
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