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
IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
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_mlormanagecluster 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_nameproperty 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,
30dcorresponds 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.