[tahoe-lafs-trac-stream] [tahoe-lafs] #1392: if you have fewer than 1000 measurements, return None (meaning "I don't know") when asked for the 99.9% percentile.

[tahoe-lafs]

#1392: if you have fewer than 1000 measurements, return None (meaning "I don't
know") when asked for the 99.9% percentile.
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     Reporter:  arch_o_median  |      Owner:  arch_o_median
         Type:  defect         |     Status:  new
     Priority:  minor          |  Milestone:  undecided
    Component:  code-storage   |    Version:  1.8.2
   Resolution:                 |   Keywords:  design-review-needed
Launchpad Bug:                 |
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Comment (by zooko):

 I asked Brian on IRC if he would be okay with this change. He replied
 something like "Yeah, but you need to find all consumers which are using
 that result and change them to handle None instead of numbers in those
 cases."

 So, I'll do that part.

 Hm, reviewing the patch now -- if you have 10 samples then you ''could''
 give an answer for 90th percentile, right? The highest sample would be the
 90th percentile, if I understand the definition of "percentile" correctly.
 The current patch has {{{None}}} for 90th percentile when there are 10
 samples. Why is that?

-- 
Ticket URL: <http://tahoe-lafs.org/trac/tahoe-lafs/ticket/1392#comment:15>
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