[metrics-bugs] #25210 [Metrics/Ideas]: Measure how often tor clients fetch the consensus

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#25210: Measure how often tor clients fetch the consensus
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     Reporter:  irl            |      Owner:  metrics-team
         Type:  project        |     Status:  new
     Priority:  Medium         |  Milestone:
    Component:  Metrics/Ideas  |    Version:
     Severity:  Normal         |   Keywords:
Actual Points:                 |  Parent ID:
       Points:                 |   Reviewer:
      Sponsor:                 |
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 We have an idea of how often this *should* be happening but we don't have
 (as far as I can see) any data on how often this actually is happening.

 This is important because the network team may use the data to identify
 bugs and reduce load, and because our user count data is based on
 directory fetches and if we have the wrong number here, then our user
 count is wrong.

 This could be achieved by logging fetches from onionperf, where we already
 have a long running tor daemon, or we could run daemons independently.
 Running them independently would give us the ability to track how often
 fetches occur for different versions of tor.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25210>
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