twitter/scalding — pull request #14 by johnynek (2012-02-23 02:34:59+00:00)
Title: Awesome new features:

* Ability to set reducers in groupBy (see .reducers)
* Ability to set reducers in join (see named parameter e.g. reducers=12)
* Some bug fixes around serializable objects.
* Increases the cascading spill thresholds (to 100k)
* Adds numeric hashing so joining longs and ints are okay.
* Enables optimized joins ("map-side" join). See RichPipe.joinWithTiny.

Tests seem to pass in 2.8.1, and 2.9.1