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druid/docs/content/development/build.md

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renaming all *.md filenames to only have lowercase and dashes so that they are editable on case-insensitive os as well
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---
layout: doc_page
---
### Build from Source
new quickstart
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You can build Druid directly from source. Please note that these instructions are for building the latest stable of Druid.
For building the latest code in master, follow the instructions [here](https://github.com/druid-io/druid/blob/master/docs/content/development/build.md).
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do some editing of the instructions for using mysql for metadata
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Building Druid requires the following:
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- [JDK 7](http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html)
or [JDK 8](http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html)
- [Maven version 3.x](http://maven.apache.org/download.cgi)
To do so, run these commands:
```
git clone git@github.com:druid-io/druid.git
cd druid
New extension loading mechanism 1) Remove maven client from downloading extensions at runtime. 2) Provide a way to load Druid extensions and hadoop dependencies through file system. 3) Refactor pull-deps so that it can download extensions into extension directories. 4) Add documents on how to use this new extension loading mechanism. 5) Change the way how Druid tarball is generated. Now all the extensions + hadoop-client 2.3.0 are packaged within the Druid tarball.
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mvn clean install
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```
This will compile the project and create the Druid binary distribution tar under
New extension loading mechanism 1) Remove maven client from downloading extensions at runtime. 2) Provide a way to load Druid extensions and hadoop dependencies through file system. 3) Refactor pull-deps so that it can download extensions into extension directories. 4) Add documents on how to use this new extension loading mechanism. 5) Change the way how Druid tarball is generated. Now all the extensions + hadoop-client 2.3.0 are packaged within the Druid tarball.
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`distribution/target/druid-VERSION-bin.tar.gz`.
new quickstart
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This will also create a tarball that contains `mysql-metadata-storage` extension under
`distribution/target/mysql-metadata-storage-bin.tar.gz`. If you want Druid to load `mysql-metadata-storage`, you can
first untar `druid-VERSION-bin.tar.gz`, then go to ```druid-<version>/extensions```, untar `mysql-metadata-storage-bin.tar.gz`
there. Now just specifiy `mysql-metadata-storage` in `druid.extensions.loadList` so that Druid will pick it up.
See [Including Extensions](../operations/including-extensions.html) for more information.