[tor-bugs] #18768 [Analysis]: Calculate the fraction of dist.torproject.org traffic for Tor Browser downloads and updates

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#18768: Calculate the fraction of dist.torproject.org traffic for Tor Browser
downloads and updates
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 Reporter:  karsten   |          Owner:
     Type:  task      |         Status:  new
 Priority:  Medium    |      Milestone:
Component:  Analysis  |        Version:
 Severity:  Normal    |     Resolution:
 Keywords:            |  Actual Points:
Parent ID:            |         Points:
 Reviewer:            |        Sponsor:
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Comment (by cypherpunks):

 Replying to [comment:7 gk]:
 > One admittedly far-fetched scenario I had in mind while writing my last
 comment was our incremental .mar file update failing badly which could
 lead up to 2 .mar file requests (one for the incremental one and one for
 the full one)
 Actually I remember seeing that the updater can also resume interrupted
 background downloads (one kind of interruption could be terminating the
 browser, for example). So one could imagine increasing that figure some.

 > per one update ping. But that would imply a weird usage pattern of
 almost all of our users.
 Yes, it would imply that the non-incremental patch is ''also'' failing,
 ''every time''... It has to be something else.

 I had thought that maybe there's something else out there, other than Tor
 Browser's updater, pulling a bunch of .mar files. I thought maybe if the
 server hosts a large number of those and a few mirrors are very eagerly
 rsyncing that could pad the ".mar requests" figure.

 In fact, if we look at this: `29958084372393 / 43530110 ≅ 688215.22`
 That's ".mar bytes" divided by ".mar requests", which results in about 670
 KiB. That's significantly less than what I would have expected for an
 average update. (Notice that similar calculations for the other items all
 result in reasonable values.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18768#comment:8>
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