[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     |    Version:
  Tor/sbws               |
     Severity:  Normal   |   Keywords:  sbws-majority-blocker, sbws-roadmap
Actual Points:           |  Parent ID:  #33775
       Points:           |   Reviewer:
      Sponsor:           |
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 #33775 shows that if sbws calculates low consensus bandwidth because of
 missing descriptors and the rest of bwauths are also using sbws, it'd
 enter in a spiral in which it'd keep measuring low.
 I think this is because while torflow multiplies the calculated ratio by
 the descriptor observed bandwidth [0], while sbws multiplies the ratio by
 the minimum of all descriptor bandwidth values *and* the consensus, which
 was added in #28598.
 So maybe the new consensus bandwidth should not depend on the previous
 one, or not as the minimum.
 For a relation on how bandwidth values depend on each other, see [1]

 [0] https://onbasca.readthedocs.io/en/latest/torflow_aggr.html
 [1] https://onbasca.readthedocs.io/en/latest/bandwidth_tor.html#bandwidth-
 values-origin

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