mirror of https://github.com/apache/druid.git
44 lines
1.6 KiB
Markdown
44 lines
1.6 KiB
Markdown
---
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id: middlemanager
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title: "MiddleManager Process"
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---
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<!--
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~ Licensed to the Apache Software Foundation (ASF) under one
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~ or more contributor license agreements. See the NOTICE file
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~ distributed with this work for additional information
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~ regarding copyright ownership. The ASF licenses this file
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~ to you under the Apache License, Version 2.0 (the
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~ "License"); you may not use this file except in compliance
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~ with the License. You may obtain a copy of the License at
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~ http://www.apache.org/licenses/LICENSE-2.0
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~ Unless required by applicable law or agreed to in writing,
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### Configuration
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For Apache Druid MiddleManager Process Configuration, see [Indexing Service Configuration](../configuration/index.html#middlemanager-and-peons).
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### HTTP endpoints
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For a list of API endpoints supported by the MiddleManager, please see the [API reference](../operations/api-reference.html#middlemanager).
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### Overview
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The MiddleManager process is a worker process that executes submitted tasks. Middle Managers forward tasks to Peons that run in separate JVMs.
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The reason we have separate JVMs for tasks is for resource and log isolation. Each [Peon](../design/peons.md) is capable of running only one task at a time, however, a MiddleManager may have multiple Peons.
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### Running
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```
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org.apache.druid.cli.Main server middleManager
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```
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