metamx/druid — pull request #56 by gianm (2013-01-16 16:16:53+00:00)
Title: Determine partitions better

- Can handle non-rolled-up input (by grouping input rows using an additional MR stage)
- Can select its own partitioning dimension, if none is supplied
- Can detect and avoid oversized shards due to bad dimension value distribution
- Shares input parsing code with IndexGeneratorJob