[tor-bugs] #21205 [Core Tor/Tor]: Instrument clients to measure directory usage

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#21205: Instrument clients to measure directory usage
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 Reporter:  nickm         |          Owner:
     Type:  project       |         Status:  new
 Priority:  Medium        |      Milestone:  Tor: 0.3.1.x-final
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:  sponsor4      |  Actual Points:
Parent ID:                |         Points:  parent
 Reviewer:                |        Sponsor:  Sponsor4
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Comment (by teor):

 One relevant value of N is the consensus expiry time (0-3 hours), another
 is the reasonably live time (24 hours after expiry, so 24-27 hours),
 another is the relay descriptor mandatory refresh time (I think this is 18
 hours, but you should check this), and another is the microdescriptor
 expiry time (which I think is a week, but you should check this). A week
 is also the time that every descriptor must change in, as onion keys are
 rotated every week.

 Also, we might want to do a scenario where the client is on but the
 network is disconnected.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21205#comment:3>
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