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I know job tasks page (in the JobTracker UI) is already showing start time and end time of every tasks in mapper and reducer but I would like to see something more like source machine names, number of spills and so on. I guess I can try to write such a tool using JobTracker class? But before embarking on that, I would like to see if there is such a tool already.
Does the
hadoop job -history all output-dircommand give you enough information to parse / process?