[tor-bugs] #22308 [Core Tor/Tor]: Consider resetting wfu/mtbf/tk values for relays when they switch IP addresses

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#22308: Consider resetting wfu/mtbf/tk values for relays when they switch IP
addresses
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 Reporter:  arma          |          Owner:
     Type:  enhancement   |         Status:  new
 Priority:  Medium        |      Milestone:  Tor: 0.3.2.x-final
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:                |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
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Comment (by arma):

 Right, a relay needs to be (among other things) in the top half of relays
 by time-known, or they automatically qualify wrt time-known if their value
 is at least 8 days. But, it isn't *really* 8 days, because the time-known
 value for each relay decays over time. The comment next to it in the code
 says it's around 20 days, but I think that's probably wrong.

 You can see the various thresholds that each directory authority is using,
 from the flag-thresholds lines in their votes:
 https://www.seul.org/~arma/moria1-v3-status-votes

 There is some debugging of the time-known tracking in #19162, but I think
 it's safe to say there are some dragons there. But bigger picture, yes,
 it's a matter of days, not months.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22308#comment:5>
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