anchor.diff:          "viz": "heatmap",
           "requests": [
             {
  -            "q": "avg:bosh.healthmonitor.system.load.1m{$job_z1,$deployment,$index} by {index,job}, avg:bosh.healthmonitor.system.load.1m{$job_z2,$deployment,$index} by {index,job}",
  +            "q": "avg:bosh.healthmonitor.system.load.1m{$job,$deployment,$index} by {index,job}",
               "style": {
                 "palette": "purple"
               }
  
positive.code:     {
        "default": "*",
        "prefix": "job",
        "name": "job_z1"
      },
      {
        "default": "job:_job",
        "prefix": "job",
        "name": "job_z2"
      },
      {
        "default": "deployment:<%= deployment %>",
  
negative.code:         "viz": "heatmap",
          "requests": [
            {
              "q": "avg:bosh.healthmonitor.system.mem.percent{$job,$deployment,$index} by {index,job}"
            }
          ]
        },
  