experiment, I'm running with three slaves, each of which has four
processors. Hadoop only appears to be using one processor on each
slave. It's very possible that I've made a configuration mistake.
I have mapred.map.tasks set to 7 (this should be enough to see two jobs
on each client, though I plan on eventually setting it higher).
mapred.tasktracker.tasks.maximum is 3 (eventually this will be higher,
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