[tor-bugs] #1984 [Torflow]: Bw Auths should assign 0 bw to first hops that fail

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#1984: Bw Auths should assign 0 bw to first hops that fail
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 Reporter:  mikeperry  |       Owner:  mikeperry
     Type:  defect     |      Status:  new      
 Priority:  normal     |   Milestone:           
Component:  Torflow    |     Version:           
 Keywords:             |      Parent:           
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 Right now we have about 50 extremely overloaded guard nodes (the Pandora*
 set) that are failing TLS connections, dir connections, and just about
 everything else.

 However, when they do manage to actually rarely complete a circuit, they
 have huge bandwidth capacity available.

 What we should do is assign a measurement of 0 every time we try to use a
 node as a first hop, but it fails to accept our extend.

 We can try to do this to the 2nd hop too, but that is less reliable, since
 it won't be clear if that extend failed because the guard sucks or if the
 node is actually broken..

 We could ensure that each exit is measured at least twice as an entry, or
 something.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/1984>
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