> I have 2 nics on my datanodes, is it possible to used the one dedicated > for replication and other for all other comunication i.e with jt and > namenodes ?
Please correct me, I am wrong, but I have never seen a support for that in Hadoop. DataNodes uses limited number of threads for balancing (afaik, 5 maximally + dfs.datanode.balance.bandwidthPerSec), so this way resources used for balancing can be limited. > Also eventhough I am using rackawareness script and dfsreport shows the > racks jobtracker shows all tasktracker in default rack, how to correct that. > We switched to YARN recently, so it is difficult for me to check it now. Do you have rack-awareness script deployed on the JobTracker machine?
