csimplestring commented on issue #6795: Different groupBy strategies for ThetaSketch and HyperUnique? URL: https://github.com/apache/incubator-druid/issues/6795#issuecomment-451390061 Hi, @leerho ， Thanks! I'll try that as well soon. Right now in Druid, there are 3 sketch options to get the approximate distinct count: - the old Druid built-in HLL, aka, HyperUnique - the DataSketch's ThetaSketch aggregator - the DataSketch's HLL Sketch aggregator I'll test them and hopefully give you a small summary.
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