twitter/scalding — pull request #245 by asiegel34 (2012-12-12 01:24:25+00:00)
Title: ReduceOperations.hyperLogLog

This adds a ReduceOperations.hyperLogLog method, which is just like ReduceOperations.approxUniques except that it leaves the field in type HLL rather than converting to its estimate size.

Useful for output to persistent stores whose approximate counts might be amended at a later time.