[tor-bugs] #15744 [Tor]: Is 16384 introductions a sane limit for IP rotation?

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#15744: Is 16384 introductions a sane limit for IP rotation?
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     Reporter:  dgoulet  |      Owner:
         Type:  defect   |     Status:  new
     Priority:  normal   |  Milestone:  Tor: 0.2.7.x-final
    Component:  Tor      |    Version:
   Resolution:           |   Keywords:  SponsorR, tor-hs
Actual Points:           |  Parent ID:  #15714
       Points:           |
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Comment (by asn):

 Let me suggest some numbers for the intro circ lifetime histogram, based
 on the normal lifetime of an intro circ (between 18-24 hours: see
 `INTRO_POINT_LIFETIME_MAX_SECONDS`).

 Here is the histogram suggestion:

 `( [0 - 30 minutes), [30 minutes - 5 hours), [5 hours - 18 hours), [18
 hours - 25 hours), [25 hours +) )`

 The idea is that the first cell counts hyper-volatile or broken services.
 Second cell counts unstable services, third cell (5 to 18 hours) counts
 stable-but-not-quite circuits. Then the 18 to 25 hours cell counts normal
 hidden services, and the final cell counts anomalous services with higher
 lifetime than little-t-tor would ever pick.

 Picked 25 hours for the right side of the normal services bin and not 24
 hours, because `INTRO_POINT_EXPIRATION_GRACE_PERIOD` might make normal
 circuits last a little longer than 24 hours.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/15744#comment:8>
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