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fix doc format

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bin liu 2016-02-03 16:24:19 +08:00
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docs/content/tutorials/tutorial-the-druid-cluster.md
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@ -23,6 +23,7 @@ cd druid-<version>
## External Dependencies
Druid requires 3 external dependencies.
* A "deep storage" that acts as a data repository. This is generally distributed storage like HDFS or S3. For prototyping or experimentation on a single machine, Druid can use the local filesystem.
* A "metadata storage" to hold configuration and metadata information. This is generally a small, shared database like MySQL or PostgreSQL. For prototyping or experimentation on a single machine, Druid can use a local instance of [Apache Derby](http://db.apache.org/derby/).
* [Apache Zookeeper](http://zookeeper.apache.org/) for coordination among different pieces of the cluster.