dfs.http.address 0.0.0.0:50070 dfs.secondary.http.address data-hadoop-slave:50090 dfs.namenode.name.dir file:///root/hdfs/namenode NameNode directory for namespace and transaction logs storage. dfs.datanode.data.dir file:///root/hdfs/datanode DataNode directory dfs.replication 2 dfs.block.size 134217728