[GitHub] edgan8 edited a comment on issue #6581: Moments Sketch custom aggregator

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edgan8 edited a comment on issue #6581: Moments Sketch custom aggregator
URL: https://github.com/apache/incubator-druid/pull/6581#issuecomment-437155597
 
 
   @leerho thanks for posting the great summary! Author of the paper here, I wanted to confirm that I fully agree with your analysis of when the M-sketch would or would not be appropriate. The actual error is data dependent. In many situations I would prefer to use the datasketches library as well which I found to be fairly reliable in my experiments. One other point to keep in mind is that the space usage of the M-sketch is also extremely low (usually < 150 bytes) so I often think of it as serving as a supplement to basic statistics and tiny histograms rather than a full-fledged sketch. 

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