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Subject: [tor-talk] understanding metrics bw graphs
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Hi,

I would have a question regarding the bw-flags graphs on metrics.tpo [1]

"guard bw history"
a) Does this include the entire accumulated traffic of relays having
the guard flag? (which would include the traffic of a guard relay
acting as a middle or exit relay - if it also has the exit flag)

or

b) Does this only and exclusively include the entire accumulated
traffic that *enters* the tor network via all guard relays?
(to actually do that the traffic accounting on relays would have to do
accounting accordingly on a per connection type level)

Which would bring me to the next question (which would be required to
actually do the required accounting for (b)): Is a relay able to tell
whether it is being used as first or second hop solely by looking at
packets (not their source)?


Same question applies to: "exit bw history"

Does your answer also apply to [2]?



[1] https://metrics.torproject.org/bandwidth.html#bandwidth-flags

[2] https://metrics.torproject.org/bandwidth.html#bwhist-flags
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