[tor-bugs] #33871 [Core Tor/sbws]: Scale exactly as torflow does?

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#33871: Scale exactly as torflow does?
-------------------------------------------------+-------------------------
 Reporter:  juga                                 |          Owner:  (none)
     Type:  defect                               |         Status:  new
 Priority:  Medium                               |      Milestone:  sbws:
                                                 |  1.1.x-final
Component:  Core Tor/sbws                        |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  sbws-majority-blocker, sbws-roadmap  |  Actual Points:
Parent ID:  #33775                               |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by juga):

 Replying to [comment:2 teor]:
 > There's a related bug here, that might only show up when the last
 Torflow instance leaves the network.
 >
 > The  target download time is 6 seconds. Tor's download measurement time
 is 10 seconds. So on average, sbws will only be using 6/10 of a relay's
 capacity over any 10 second period.
 >
 > I suggest that we make the average sbws download time at least 10
 seconds, to avoid this issue.

 Which is similar to ticket #28545 (with 11 seconds).

 If understood correctly the way that Torflow calculates the new consensus
 banwdwidth [0] (and might be worth someone double check), the measured
 bandwidth influences very "little" on the new bandwidth (which i've try to
 say some times).
 So i think, that changing the download time have less impact on the new
 calculated bandwidth than the consensus/descriptor previous bandwidth
 values.

 [0] https://onbasca.readthedocs.io/en/latest/torflow_aggr.html,
 https://gitweb.torproject.org/torspec.git/tree/bandwidth-file-
 spec.txt#n1167

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33871#comment:4>
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