Dennis
Can someone explain how duplicate keys are merged inside of a reduce
program to give multiple values in the Iterator for the reduce operation.?
I think it is happening in the sort of the sequence file butI also see
the CombiningCollector. I was able to write a MapReduce program
successfully and I am getting values with the same keys merged even when
I don't use the CombiningCollector. Is the CombiningCollector even used
anymore? I just want to understand more about what is happening under
the hood.
