Is it possible to create a hadoop cluster by connecting three single node machines?

If i have three three virtual machines with cloudera hadoop single node installed, is it possible to create a cluster by connecting three of them? like one as namenode and other two as datanodes.

I am following this documentaion...


Of course you can connect them and things should be easy once all hosts run in pseudo-distributed mode ( all the demons on the same host ). In theory all you have to do is configuration change on all 3 hosts. In practice you have to read also this because things are a bit different.

The first external datanode is hard work, any other will follow with no problems.

This tutorial provides exactly what you need. HTH.

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