Hey, Which class handles the top level partitioning for MapReduce? It's possible I have a misunderstanding of how this is handled, but in my view, there is a top level controller which kicks off the whole process; it handles partitioning of the input and distribution of the input segments to the various machines/tasks. I have been searching through a lot of the Job classes, and they all seem to handle a single task, whereas it is important for me to perform some work at the highest level controller, if that exists. Any info on what I'm looking for/if I'm on the wrong track would be much appreciated.
Thanks for the help, John
