I have a 7 node cluster. Now if ssh to NN, and type in-hadoop -put /home/hadoop/Desktop/test.java /user/hadoop ------> the file gets placed in HDFS and gets replicated automatically.
Now if the same file is in one of the datanodes in the same location. And I want to place it in HDFS through NN, and not ssh'ing to that datanode-------> then what should the format of the command. I tried hadoop -put 10.20.220.30:50133/home/hadoop/Desktop/test.java /user/hadoop-------> here, 30 Ip is the datanode. But it didn't work. Also, I want to make it work though JAVA code by using all thise API's. So will I have to invoke RPC clients and servers methods to resolve this?? Also, If this complete structure is executed on a remote node that has no connections with hadoop, what kind of scenarios I will have to face? Thanks! -- Regards! Sugandha
