I am interested in examining a MapReduce execution in order to determine
the amount of time it takes to execute each of the following parts of a
MapReduce job:
- Loading of data onto mappers
- Executing map operation
- Sorting/partitioning of map output
- Loading map output onto reducers
- Executing reduce operation
- Writing output of reducers to data files
Does Hadoop have a built-in mechanism to profile a MapReduce application
in this way, and if not, have other mechanisms to do this been developed?
-Alex Mont
