In-Mapper Combiner vs. Combiner

[Augusto Queiroz de Macedo]

Hi everyone,

I am new to MRJob and i can't answer the following question:

* What is the difference between the implementation of an in-mapper combiner (as here) and the basic combiner?

For short imagine that the in-mapper combiner is just a name given to the implementation of the mapper_init and mapper_final methods in order to minimize the data passed to the reduce.

Thank you