Hadoop is a free software to distribute some tasks between many computers in cluster. It is using the Map/Reduce technique to break a job into tasks.
Modified: 2014/06/20

Map/Reduce Technique

Details and example of the concept

Modified: 2015/05/23

Hadoop 2.4.0 – Installation and standalone use

Try locally

Modified: 2015/05/23

Hadoop 2.4.0 – Use with a one node cluster

Configure to run in distributed mode on only one node

Modified: 2016/07/26

Hadoop – Considerations for your Java libraries

What we need to know about the Hadoop libraries and the execution modes