{
   "report_name" : "jobtracker_map_slot_report",
   "report_type" : "standard",
   "title" : "Map Slot Utilization",
   "vertical_label" : "Slots",
   "series" : [
      { "metric": "mapred.jobtracker.map_slots", "color": "ff0000", "label": "Total", 
        "line_width": "2", "type": "line" },
      { "metric": "mapred.jobtracker.occupied_map_slots", "color": "ff6ca9", "label": "Occupied",
        "line_width": "2", "type": "stack" },
      { "metric": "mapred.jobtracker.reserved_map_slots", "color": "ff6600", "label": "Reserved",
        "line_width": "2", "type": "stack" }
   ]
}