mon_dashboard/src/addOns/ganglia/graph.d/hdp_mon_hdfs_capacity_remaining_report.json

{
   "report_name" : "hdfs_capacity_remaining_report",
   "report_type" : "standard",
   "title" : "HDFS Capacity Remaining",
   "vertical_label" : "GB",
   "series" : [
      { "metric": "dfs.FSNamesystem.CapacityRemainingGB", "color": "ff0000", "label": "Capacity Remaining", 
        "line_width": "2", "type": "line" }
   ]
}