Hi In YARN, shuffle and sort is pluggable: http://hadoop.apache.org/docs/r2.5.2/hadoop-mapreduce-client/hadoop-mapreduce-client-core/PluggableShuffleAndPluggableSort.html
Currently, shuffle is based on sort. But many of my mapreduce jobs do not need sort. To improve performance, maybe it is better to avoid sort and use hash instead. So, is there a hash-based shuffle plugin? Seems hadoop itselt does not do this. Any third-party implements? Thanks
