[tor-bugs] #2394 [Torflow]: Export Bw Authorty stats for metrics/researchers

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#2394: Export Bw Authorty stats for metrics/researchers
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 Reporter:  mikeperry    |       Owner:  mikeperry
     Type:  enhancement  |      Status:  new      
 Priority:  normal       |   Milestone:           
Component:  Torflow      |     Version:           
 Keywords:               |      Parent:           
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Comment(by karsten):

 I'm not exactly sure what history graphs you have in mind.  Also, maybe we
 should look closer at a single consensus before aggregating everything
 over time.  Please have a look at the attached PDF which is based on the
 consensus published at 2011-01-24 00:00:00.

  - Page 1 shows a scatterplot of measured bandwidth as reported in
 consensuses and observed bandwidth as reported in descriptors.  Note that
 observed really means observed, not advertised = min(observed, average).
 The graph shows that we prefer fast relays by giving them ratios of more
 than 5 times their observed bandwidth (dashed line).  There's no apparent
 preference for fast relays with/without !Guard/Exit flag.

  - Page 2 zooms in the lower left part of page 1.  We can see that we're
 discriminating against slow Exit and Middle relays, maybe even against all
 slow relays.

  - Page 3 shows cumulative distribution functions of the ratios.  The
 point where lines cross 1 is where ratios turn from relays being rated
 down to relays being rated up.  For example, we rate only 1/3 of Guard and
 Guard+Exit nodes down, but more than 3/4 of the Exit and Middle nodes.
 Also, about 5 % of Middle and 10 % of Exit relays have a ratio of exactly
 1.

 Did you already open a ticket for new stats from bw authorities?  If so,
 we can reassign this ticket to component Metrics.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/2394#comment:4>
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