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

{
   "report_name" : "hdfs_io_report",
   "report_type" : "standard",
   "title" : "HDFS I/O",
   "vertical_label" : "Bytes/Sec",
   "series" : [
      { "metric": "dfs.datanode.BytesWritten", "color": "ff0000", "label": "Bytes Written/Sec", "line_width": "2", "type": "line" },
      { "metric": "dfs.datanode.BytesRead", "color": "0000ff", "label": "Bytes Read/Sec", "line_width": "2", "type": "line" }
   ]
}