Question is on cdh3u4, the cluster was setup before I owned this cluster, and somehow the namenode/jobtracker/datanode/tasktracker every server process is run by a user named foo, and all job are launch and run by foo user include HDFS directories/files structure owenership, basically foo is everywhere.
Today i start to think of trying to correct this by having has namenode + datanode run by hdfs user has jobtracker + tasktracker run by mapred user So far, i have a very short list that need to be changed, and i will try out in the test cluster. eg. create use hdfs, mapred every where ownership of dfs.name.dir, dfs.data.dir, fs.checkpoint.dir will change to hdfs ownership of mapred.local.dir, will change to mapred restart the cluster with hdfs for HDFS side, and mapred for MapRed side. i am 100% sure that i missed certain things that have to take care, I will really appreciate all the input. However, the original question i would love to ask is this even feasible or make sense trying to change this. Thanks P
