[tor-bugs] #2519 [Metrics]: Change aggregation from daily averages to rolling 24-hour averages

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#2519: Change aggregation from daily averages to rolling 24-hour averages
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 Reporter:  karsten      |          Owner:  karsten 
     Type:  enhancement  |         Status:  accepted
 Priority:  normal       |      Milestone:          
Component:  Metrics      |        Version:          
 Keywords:               |         Parent:          
   Points:               |   Actualpoints:          
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Changes (by karsten):

  * status:  new => accepted


Comment:

 keb:  In the future, when you add an attachment, please also a short
 comment, because Trac only sends mails for comments, not for attachments.
 I found your attachment only by chance.

 The user number estimates in the graphs are hardly precise enough to
 identify individual users.  We run too many transformations on the
 original data for the results to be interepreted as exact numbers.  The
 maximum of 34 estimated users in the graph could be 34 real users, or 17,
 or 68, or some other number.  The graphs are useful to compare usage over
 time, but they are hardly precise numbers.

 Now, you could argue that our input data is not aggregated enough to
 protect the identities of single users.  See Section 5 of
 [https://metrics.torproject.org/papers/wecsr10.pdf our WECSR 2010 paper]
 for more information.  If you want to argue why our approach to count
 daily connecting users is wrong or dangerous, the tor-dev mailing list
 would be a better place than this Trac ticket, because it has more eyes.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/2519#comment:1>
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