diff --git a/docs/content/tutorials/tutorial-the-druid-cluster.md b/docs/content/tutorials/tutorial-the-druid-cluster.md index 524addb6a3d..69f40dd6ef0 100644 --- a/docs/content/tutorials/tutorial-the-druid-cluster.md +++ b/docs/content/tutorials/tutorial-the-druid-cluster.md @@ -23,6 +23,7 @@ cd druid- ## 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.