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Ceilometer/AlarmEvaluatorJuno

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Revision as of 15:04, 16 May 2014 by Nsaje (talk | contribs) (Created page with "====Statistics over sliding windows==== Statistics where increments/decrements are possible: * count, * sum, * average, * stddev Statistics with special implementation: *...")
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Statistics over sliding windows

Statistics where increments/decrements are possible:

  • count,
  • sum,
  • average,
  • stddev

Statistics with special implementation:

  • min/max : needs O(log n) space (probably in DB), where n = window size
  • percentile : classical statistics query
  • cardinality : approximate algorithm, extremely efficient
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