{
  "name": "ONE-SCALE",
  "deployment": "none",
  "roles": [
    {
      "name": "appserver",
      "cardinality": 2,
      "vm_template": 0,

      "min_vms" : 5,
      "max_vms" : 10,

      "elasticity_policies" : [
        {
          // +2 VMs when the exp. is true for 3 times in a row,
          // separated by 10 seconds
          "expression" : "CONNECTION > 2000",

          "type" : "CHANGE",
          "adjust" : 2,

          "period_number" : 3,
          "period" : 10
        },
        {
          // -10 percent VMs when the exp. is true.
          // If 10 percent is less than 2, -2 VMs.
          "expression" : "CONNECTION < 2000",

          "type" : "PERCENTAGE_CHANGE",
          "adjust" : -10,
          "min_adjust_step" : 2
        }
      ]
    }
  ]
}