Hi sumadhur, As u mentioned configureg the NN and JT ip would be enough.
I am not able to understand how on DN restart its IP get changed? ________________________________________ From: sumadhur [sumadhur_i...@yahoo.com] Sent: Tuesday, May 01, 2012 10:58 AM To: common-user@hadoop.apache.org Subject: adding or restarting a data node in a hadoop cluster I am on hadoop 0.20. To add a data node to a cluster, if we do not use the include/exclude/slaves files, do we need to do anything other than configuring the hdfs-site.xml to point to name node and the mapred-site.xml to point to job tracker? For example, should the job tracker and name node be restarted always? On a related note, if we restart a data node(that has some blocks on it) and the data node now has new IP address, Should we restart namenode/job tracker for hdfs and map-reduce to function correctly? Would the blocks on the restarted data node be detected or would hdfs think that these blocks were lost and start replicating them? Thanks, Sumadhur
