Hi all, The number of Reducer groups in my MapReduce is always the same as the number of records output by the MapReduce. So what I understand is every record from the Shuffle/Sort is going to different Reducer.reduce. How can I change this? My key is BytesWritable and I tried writing my own Comparator and set it in setOutputValueGroupingClass but still not more than one record is entering the same reduce group. Someone please tell me the mechanism behind this so that I can fix this problem . I am not caring about Partitioner since I am using a single reducer.
Thanks, Matthew
