2. Installing VectorH : Hadoop Requirement
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Hadoop Requirement
You must install and configure Hadoop before installing VectorH.
Important!  We recommend that the Hadoop NameNode and DataNode be separate. VectorH works only when the NameNode works. If the NameNode doubles as a DataNode, and the DataNode runs out of disk space because of a large amount of data, the cluster will stop working, and this is hard to fix manually.
For more information about supported Hadoop distributions, see the readme.