It isn't as mergeable as I would like. If you have randomized record selection, it should be possible, but perverse ordering can cause serious errors.
It would be better to use something like a Q-digest. http://www.cs.virginia.edu/~son/cs851/papers/ucsb.sensys04.pdf On Wed, Aug 7, 2013 at 4:21 AM, Otis Gospodnetic <[email protected] > wrote: > Hi, > > Is OnlineSummarizer algo "mergeable"? > > Say that we compute a percentile for some metric for time 12:00-12:01 > and store that somewhere, then we compute it for 1201-12:02 and store > that separately, and so on. > > Can we then later merge these computed and previously stored > percentile "instances" and get an accurate value? > > Thanks, > Otis > -- > Performance Monitoring -- http://sematext.com/spm > Solr & ElasticSearch Support -- http://sematext.com/ >
