[role="xpack"]
[testenv="platinum"]
[[ml-update-snapshot]]
=== Update model snapshots API
++++
<titleabbrev>Update model snapshots</titleabbrev>
++++

Updates certain properties of a snapshot.

[[ml-update-snapshot-request]]
==== {api-request-title}

`POST _ml/anomaly_detectors/<job_id>/model_snapshots/<snapshot_id>/_update`

[[ml-update-snapshot-prereqs]]
==== {api-prereq-title}

* If the {es} {security-features} are enabled, you must have `manage_ml` or
`manage` cluster privileges to use this API. See
<<security-privileges>>.


[[ml-update-snapshot-path-parms]]
==== {api-path-parms-title}

`<job_id>`::
  (Required, string) Identifier for the {anomaly-job}.

`<snapshot_id>`::
  (Required, string) Identifier for the model snapshot.

[[ml-update-snapshot-request-body]]
==== {api-request-body-title}

The following properties can be updated after the model snapshot is created:

`description`::
  (Optional, string) A description of the model snapshot. For example,
  "Before black friday".

`retain`::
  (Optional, boolean) If true, this snapshot will not be deleted during
  automatic cleanup of snapshots older than `model_snapshot_retention_days`.
  Note that this snapshot will still be deleted when the {anomaly-job} is
  deleted. The default value is false.

[[ml-update-snapshot-example]]
==== {api-examples-title}

The following example updates the snapshot identified as `1491852978`:

[source,console]
--------------------------------------------------
POST
_ml/anomaly_detectors/it_ops_new_logs/model_snapshots/1491852978/_update
{
  "description": "Snapshot 1",
  "retain": true
}
--------------------------------------------------
// TEST[skip:todo]

When the snapshot is updated, you receive the following results:
[source,js]
----
{
  "acknowledged": true,
  "model": {
    "job_id": "it_ops_new_logs",
    "timestamp": 1491852978000,
    "description": "Snapshot 1",
...
    "retain": true
  }
}
----