anchor.diff:  	  title: "HDFS reads/executor",
   	  type: "graphite",
             datasource: 'influxdb',
  -	  span: 6,
  +	  span: 3,
   	  targets:[
   	  {
                 select:[[
  
positive.code: 	  type: "graphite",
            datasource: 'influxdb',
  	  stack: true,
  	  span: 6,
  	  steppedLine: true,
  	  targets:[
  	  {
  
negative.code:               ]],
                groupBy: [{type: 'time', params: ['10s']},{type: 'fill', params: ['null']}],
                measurement: '/$prefix.*.filesystem.hdfs.read_bytes/',
  	      alias:"$m"
            },
  	  ]
        },
        {
  	  title: "HDFS writes/s, 10s avgs",
  	  type: "graphite",
            datasource: 'influxdb',
  	  stack: true,
  	  span: 3,
  	  steppedLine: true,
  	  targets:[
  	  {
                select:[[
                    {'type': 'field', 'params': ['value']},{'type': 'mean', 'params': []},{'type': 'non_negative_derivative', 'params': ['10s']},
                ]],
                groupBy: [{type: 'time', params: ['10s']},{type: 'fill', params: ['null']}],
                measurement: '/$prefix.*.filesystem.hdfs.write_ops/',
  	      alias:"$m"
            },
  	  ]
        },
        {
  	  title: "HDFS writes/executor",
  	  type: "graphite",
            datasource: 'influxdb',
  	  span: 3,
  	  targets:[
  	  {
                select:[[
                    {'type': 'field', 'params': ['value']},{'type': 'mean', 'params': []},
                ]],
                groupBy: [{type: 'time', params: ['10s']},{type: 'fill', params: ['null']}],
                measurement: '/$prefix.*.filesystem.hdfs.write_ops/',
  	      alias:"$m"
            },
  	  ]
        },
  	{
  	  title: "HDFS bytes writes/s, 10s avgs",
  	  type: "graphite",
            datasource: 'influxdb',
  	  stack: true,
  	  span: 3,
  	  targets:[
  	  {
                select:[[
                    {'type': 'field', 'params': ['value']},{'type': 'mean', 'params': []},{'type': 'non_negative_derivative', 'params': ['10s']},
                ]],
                groupBy: [{type: 'time', params: ['10s']},{type: 'fill', params: ['null']}],
                measurement: '/$prefix.*.filesystem.hdfs.write_bytes/',
  	      alias:"$m"
            },
  	  ]
        },
        {
  	  title: "HDFS byte writess/executor",
  	  type: "graphite",
            datasource: 'influxdb',
  	  span: 3,
  	  targets:[
  	  {
                select:[[
                    {'type': 'field', 'params': ['value']},{'type': 'mean', 'params': []},
                ]],
                groupBy: [{type: 'time', params: ['10s']},{type: 'fill', params: ['null']}],
                measurement: '/$prefix.*.filesystem.hdfs.write_bytes/',
  	      alias:"$m"
            },
  	  ]
  