anchor.diff:  	{
   	    select:[[
   		{'type':'field','params':['CorruptBlocks']},
  -		{'type': 'median', 'params': []},
  +		{'type': 'max', 'params': []},
   	    ]],
   	    groupBy: [{type: 'time', params: ['$interval']},{type: 'fill', params: ['none']}],
   	    measurement: 'namenode',
  
positive.code: 	{
  	    select:[[
  		{'type':'field','params':['MissingBlocks']},
  		{'type': 'median', 'params': []},
  	    ]],
  	    groupBy: [{type: 'time', params: ['$interval']},{type: 'fill', params: ['none']}],
  	    measurement: 'namenode',
  
negative.code:     datasource: 'influxdb',
      span: 3,
      steppedLine: true,
      interval: ">10s",
      "yaxes": [
  	{
  	    "format": "short",
  