[tor-bugs] #18688 [Core Tor/Tor]: Relays should disable DirPort if RelayBandwidthRate is less than 50kb/s

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#18688: Relays should disable DirPort if RelayBandwidthRate is less than 50kb/s
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 Reporter:  teor                       |          Owner:
     Type:  defect                     |         Status:  new
 Priority:  Medium                     |      Milestone:  Tor: unspecified
Component:  Core Tor/Tor               |        Version:
 Severity:  Normal                     |     Resolution:
 Keywords:  tor-03-unspecified-201612  |  Actual Points:
Parent ID:                             |         Points:
 Reviewer:                             |        Sponsor:
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Comment (by arma):

 Oh, I see what's going on here. You're actually fetching the consensus,
 and seeing how long it takes, and sad that some relays are slow.

 This slowness is unlikely to be because of RelayBandwidthRate. And by
 unlikely, I mean it isn't. Specifically, I spot checked all of the relays
 you described, and for zero of them it was because of RelayBandwidthRate.
 I know this because relays put their bandwidthrates in their descriptors.

 So what you really meant here was "relays should disable their dirport if
 they're overloaded". But overloaded is relative, and time based, and not
 something that relays have a chance to notice right now.

 That said, relays do aim to return a 503 in responsive to a consensus
 fetch, when they know their rate limits are going to cause them to run out
 of bytes in the token bucket.

 But probably the really slow relays are the ones who have set their
 bandwidthrates too *high*, meaning they are experiencing all sorts of
 messy congestion at the network layer because they're trying to talk too
 much.

 I'm tempted to close this ticket with reason "you misunderstood what
 relaybandwidthrate is". Plausible?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18688#comment:8>
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