原文地址: https://www.elastic.co/guide/en/elasticsearch/reference/7.7/ml-forecast.html, 原文档版权归 www.elastic.co 所有

Forecast jobs APIedit

Predicts the future behavior of a time series by using its historical behavior.

Requestedit

POST _ml/anomaly_detectors/<job_id>/_forecast

Prerequisitesedit

  • If the Elasticsearch security features are enabled, you must have manage_ml or manage cluster privileges to use this API. See Security privileges.

Descriptionedit

You can create a forecast job based on an anomaly detection job to extrapolate future behavior. Refer to Forecasting the future and forecast limitations to learn more.

You can delete a forecast by using the Delete forecast API.

  • If you use an over_field_name property in your job, you cannot create a forecast. For more information about this property, see Create jobs.
  • The job must be open when you create a forecast. Otherwise, an error occurs.

Path parametersedit

<job_id>
(Required, string) Identifier for the anomaly detection job.

Request bodyedit

duration
(Optional, time units) A period of time that indicates how far into the future to forecast. For example, 30d corresponds to 30 days. The default value is 1 day. The forecast starts at the last record that was processed.
expires_in
(Optional, time units) The period of time that forecast results are retained. After a forecast expires, the results are deleted. The default value is 14 days. If set to a value of 0, the forecast is never automatically deleted.

Examplesedit

POST _ml/anomaly_detectors/total-requests/_forecast
{
  "duration": "10d"
}

When the forecast is created, you receive the following results:

{
  "acknowledged": true,
  "forecast_id": "wkCWa2IB2lF8nSE_TzZo"
}

You can subsequently see the forecast in the Single Metric Viewer in Kibana.