https://community.cloudera.com/t5/Support-Questions/Copying-Data-to-HDFS-takes-too-much-time/m-p/164632#M126999 <P><A rel="user" href="https://community.cloudera.com/users/2648/sshimpi.html" nodeid="2648">@Sagar Shimpi</A> </P><P>The duplex mode was half on all the machines so i switched it back to full.</P><P>And the mtu value was set to 1500 i tried it changing to 9000.</P><P>The moment i changed mtu to 9000 every time i copy the data i get bad datanode exception.</P> Wed, 01 Jun 2016 01:56:54 GMT hari1 2016-06-01T01:56:54Z