[tor-bugs] #26769 [Core Tor/Tor]: We should make HSv3 desc upload less frequent

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#26769: We should make HSv3 desc upload less frequent
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 Reporter:  asn                               |          Owner:  neel
     Type:  defect                            |         Status:
                                              |  needs_review
 Priority:  Medium                            |      Milestone:  Tor:
                                              |  0.3.5.x-final
Component:  Core Tor/Tor                      |        Version:
 Severity:  Normal                            |     Resolution:
 Keywords:  tor-hs network-health easy hsdir  |  Actual Points:
Parent ID:                                    |         Points:
 Reviewer:  asn                               |        Sponsor:
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Comment (by asn):

 Replying to [comment:5 arma]:
 > Replying to [ticket:26769 asn]:
 > > HSDirs are supposed to cache HS descriptors for the inscribed lifetime
 (3 hours)
 >
 > Are there clock skew issues to worry about here? Like, an onion service
 whose clock is off by an hour, thus causing the hsdir to cache it for less
 time than we would otherwise expect?

 I don't think that's an issue because the lifetime field is the number of
 seconds after which the descriptor should expire; and not an absolute date
 string. So the lifetime says "3 hours" and HSDirs will hold it for 3 hours
 before expiring it, regardless of clock times.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26769#comment:7>
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