https://community.cloudera.com/t5/Support-Questions/How-to-change-the-name-node-and-data-node-instance-types/m-p/192695#M154759 <A rel="user" href="https://community.cloudera.com/users/10949/muthukumarsiva.html" nodeid="10949">@Muthukumar S</A><P>You can follow 'Option 1' with below additional steps:</P><OL> <LI>Stop the cluster.</LI><LI>Go to the ambari HDFS configuration and edit the datanode directory configuration: Remove /hadoop/hdfs/data and /hadoop/hdfs/data1. Add /hadoop/hdfs/datanew save.</LI><LI>Login into each datanode VM and copy the contents of /data and /data1 into /datanew</LI><LI>Change the ownership of /datanew and everything under it to “hdfs”.</LI><LI>Start the cluster.</LI></OL><P>FYI, these steps are as <A href="https://community.hortonworks.com/articles/2308/how-to-move-or-change-the-hdfs-datanode-directorie.html">KB</A>.</P> Thu, 19 Jul 2018 16:42:35 GMT ssubhas 2018-07-19T16:42:35Z