In Fully Distributed mode, the clusters range from a few nodes to 'n' NUMBER of nodes. It is used in PRODUCTION ENVIRONMENTS, where we have thousands of machines in the HADOOP cluster. The daemons of Hadoop run on these clusters. We have to configure separate masters and separate slaves in this distribution, the implementation of which is quite complex. In this configuration, Namenode and Datanode runs on DIFFERENT hosts and there are nodes on which task tracker runs. The root of the distribution is referred as HADOOP_HOME.

In Fully Distributed mode, the clusters range from a few nodes to 'n' number of nodes. It is used in production environments, where we have thousands of machines in the Hadoop cluster. The daemons of Hadoop run on these clusters. We have to configure separate masters and separate slaves in this distribution, the implementation of which is quite complex. In this configuration, Namenode and Datanode runs on different hosts and there are nodes on which task tracker runs. The root of the distribution is referred as HADOOP_HOME.