[tor-bugs] #10968 [Tor]: Authorities should use past consensuses to assign relay flags

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#10968: Authorities should use past consensuses to assign relay flags
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 Reporter:  asn       |          Owner:
     Type:  task      |         Status:  new
 Priority:  normal    |      Milestone:  Tor: 0.2.5.x-final
Component:  Tor       |        Version:
 Keywords:  tor-auth  |  Actual Points:
Parent ID:            |         Points:
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 At the moment, each authority decides what flags to assign to each node
 based on its own memory. This means that authorities that have been
 started recently have a different impression -- compared to more long-
 lived authorities -- about some relays .

 Something that might make more sense is if authorities used past
 consensuses to get a better idea about the stability and speed of relays.

 Since authorities don't keep past consensuses around, a way to do the
 above might be to create a script that each authority runs, downloads the
 past consensuses, calculates statistics about all nodes, and then it
 creates a file with those statistics. Then the authority loads that file,
 and uses it to update its knowledge base.

 There might be better approaches.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/10968>
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