[tor-bugs] #20132 [Core Tor/Tor]: Let large client deployments use a local directory cache

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#20132: Let large client deployments use a local directory cache
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 Reporter:  teor                   |          Owner:
     Type:  enhancement            |         Status:  new
 Priority:  Medium                 |      Milestone:  Tor: 0.2.???
Component:  Core Tor/Tor           |        Version:
 Severity:  Normal                 |     Resolution:
 Keywords:  tor-hs, tor2web, rsos  |  Actual Points:
Parent ID:                         |         Points:  1
 Reviewer:                         |        Sponsor:
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Comment (by arma):

 Replying to [ticket:20132 teor]:
 > One of the things that concerns me about large tor client farms is that
 they download a ~1.5MB consensus per client per hour.

 It should in theory be compressed, so smaller than that. But yes, it is a
 lot over time, per client.

 > It would really help to have a client option for this in Tor, but there
 is a tradeoff - compromise that relay, and you own all the clients.

 In theory, this is what DirPort was for long ago. If you set up one Tor
 client with a DirPort, and set httpproxy on your other clients, then
 they'll ask their dir questions to the one central client. I guess this is
 a bit trickier nowadays with the begindir style questions, but that's a
 simple matter of turning off ... wait, it appears that we ripped out
 TunnelDirConns. Well, we used to have this functionality, back in the day.
 :)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20132#comment:1>
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