PERCENTAGE_CHANGE

Compares the current timeseries to a baseline. If the current value is not in [baseline - percentage * baseline, baseline + percentage * baseline], detects an anomaly.

Inputs

"targetProperty": "current": The data on which to perform detection.

"targetProperty": "baseline": The data to use as a baseline.

The inputs should have the same size.

Parameters

name	description	default value
component.percentageChange	The percentage threshold. If the percentage change is above this threshold, detect an anomaly. In ratio. Eg 0.1 means 10 percent.	Inf
component.pattern	Detect as an anomaly if the metric drop, rise or both directions. UP, DOWN, UP_OR_DOWN.	UP_OR_DOWN

Example

{
    "name": "root",
    "type": "AnomalyDetector",
    "params": {
    "type": "PERCENTAGE_CHANGE",
    "component.percentageChange": "0.2",   # 20% threshold 
    "component.pattern": "UP",             # only detect change up       
      ...  # shared parameters
    }, 
  "inputs": [
    {    # baseline data
      "targetProperty": "baseline",               
      "sourcePlanNode": "baselineDataFetcher",
      "sourceProperty": "baselineOutput"
    },
    {    # current data
      "targetProperty": "current",                
      "sourcePlanNode": "currentDataFetcher",
      "sourceProperty": "currentOutput"
    }
  ]
}