---
title: stack es ml preview-datafeed cli command
description: Preview a datafeed. Behaviour flags: --dry-run — validate all inputs and exit without performing any action 
url: https://www.elastic.co/elastic/docs-builder/docs/4083/reference/elastic-cli/cli/stack/es/ml/preview-datafeed
applies_to:
  - Elastic Cloud Serverless: Preview
  - Elastic Stack: Preview
---

# stack es ml preview-datafeed cli command
<cli-modifiers>
</cli-modifiers>

```bash
elastic stack es ml preview-datafeed [options]
```

Preview a datafeed.
**Behaviour flags:**
`--dry-run` — validate all inputs and exit without performing any action

## Options

<definitions>
  <definition term="--start string">
    The start time from where the datafeed preview should begin
  </definition>
  <definition term="--end string">
    The end time when the datafeed preview should stop
  </definition>
  <definition term="--datafeed-config string">
    The datafeed definition to preview.
  </definition>
  <definition term="--job-config string">
    The configuration details for the anomaly detection job that is associated with the datafeed. If the
    `datafeed_config` object does not include a `job_id` that references an existing anomaly detection job, you must
    supply this `job_config` object. If you include both a `job_id` and a `job_config`, the latter information is
    used. You cannot specify a `job_config` object unless you also supply a `datafeed_config` object.
  </definition>
  <definition term="--datafeed-id string">
    A numerical character string that uniquely identifies the datafeed. This identifier can contain lowercase
    alphanumeric characters (a-z and 0-9), hyphens, and underscores. It must start and end with alphanumeric
    characters. NOTE: If you use this path parameter, you cannot provide datafeed or anomaly detection job
    configuration details in the request body.
  </definition>
  <definition term="--error-trace">
    When set to `true` Elasticsearch will include the full stack trace of errors
    when they occur.
  </definition>
  <definition term="--filter-path string">
    Comma-separated list of filters in dot notation which reduce the response
    returned by Elasticsearch.
    **Repeatable:** pass `--filter-path` multiple times to supply more than one value
  </definition>
  <definition term="--human">
    When set to `true` will return statistics in a format suitable for humans.
    For example `"exists_time": "1h"` for humans and
    `"exists_time_in_millis": 3600000` for computers. When disabled the human
    readable values will be omitted. This makes sense for responses being consumed
    only by machines.
  </definition>
  <definition term="--pretty">
    If set to `true` the returned JSON will be "pretty-formatted". Only use
    this option for debugging only.
  </definition>
  <definition term="--input-file string">
    path to a JSON file to use as command input
  </definition>
  <definition term="--dry-run">
    validate all inputs and exit without performing any action (preview changes without applying them)
  </definition>
</definitions>


## Global Options

<definitions>
  <definition term="--json">
    output as JSON
  </definition>
</definitions>