[tor-bugs] #17158 [Core Tor/Tor]: Run an opt-in process for fallback directories

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#17158: Run an opt-in process for fallback directories
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 Reporter:  teor                                 |          Owner:  teor
     Type:  enhancement                          |         Status:
 Priority:  Medium                               |  needs_review
Component:  Core Tor/Tor                         |      Milestone:  Tor:
 Severity:  Normal                               |  0.2.8.x-final
 Keywords:  028-triaged, TorCoreTeam201604,      |        Version:
  must-fix-before-028-rc                         |     Resolution:
Parent ID:                                       |  Actual Points:  3 weeks
 Reviewer:                                       |         Points:  small-
                                                 |  remaining
                                                 |        Sponsor:
                                                 |  SponsorU-can
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Comment (by teor):

 I've pushed a (large) number of fixups to the fallback whitelist to the
 branch as operator replies continue to trickle in.

 One operator withdrew a fallback that was on the actual fallback list. I
 have pushed a fixup after rebuilding the fallback list. 11 fallbacks on
 the list changed (another turns up in the diff, but is just a reordering).
 It's good to see the list is stable, even though I changed 14
 whitelist/blacklist entries.

 It's worth noting that the ''smallest'' relay on this list could be able
 to handle the entire expected client load itself - it currently serves
 2-3x the expected load from all clients. The largest relays could each
 handle the entire client load easily.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17158#comment:39>
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