druid/docs/content/design/peons.md

---
layout: doc_page
title: "Peons"
---

<!--
  ~ Licensed to the Apache Software Foundation (ASF) under one
  ~ or more contributor license agreements.  See the NOTICE file
  ~ distributed with this work for additional information
  ~ regarding copyright ownership.  The ASF licenses this file
  ~ to you under the Apache License, Version 2.0 (the
  ~ "License"); you may not use this file except in compliance
  ~ with the License.  You may obtain a copy of the License at
  ~
  ~   http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing,
  ~ software distributed under the License is distributed on an
  ~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  ~ KIND, either express or implied.  See the License for the
  ~ specific language governing permissions and limitations
  ~ under the License.
  -->

# Peons

### Configuration

For Peon Configuration, see [Peon Query Configuration](../configuration/index.html#peon-query-configuration) and [Additional Peon Configuration](../configuration/index.html#additional-peon-configuration).

### HTTP Endpoints

For a list of API endpoints supported by the Peon, please see the [Peon API reference](../operations/api-reference.html#peon).

Peons run a single task in a single JVM. MiddleManager is responsible for creating Peons for running tasks.
Peons should rarely (if ever for testing purposes) be run on their own.

### Running

The peon should very rarely ever be run independent of the middle manager unless for development purposes.

```
org.apache.druid.cli.Main internal peon <task_file> <status_file>
```

The task file contains the task JSON object.
The status file indicates where the task status will be output.