Need some guidance on CDH4 installation from tarballs I have downloaded two files from " https://ccp.cloudera.com/display/SUPPORT/CDH4+Downloadable+Tarballs "
*1) hadoop-0.20-mapreduce-0.20.2+1341 *(has only MRv1)* 2) hadoop-2.0.0+922 *(has HDFS+ Yarn) I was able to install MRv1 from first file "*1) hadoop-0.20-mapreduce-0.20.2+1341 *" I have edited the *hadoop-env.sh*, core-site.xml,hdfs-site.xml and mapred-site.xml present in the conf directory of the untared file. My JobTracker and TaskTracker are working fine. I could see few new variables to in *hadoop-env.sh *they are: *HADOOP_NAMENODE_OPTS HADOOP_SECONDARYNAMENODE_OPTS HADOOP_DATANODE_OPTS HADOOP_BALANCER_OPTS HADOOP_JOBTRACKER_OPTS What are these ? Am I supposed to set these? *After untaring "*2) hadoop-2.0.0+922" . *I can see one more set of config files at */etc/hadoop/* Do I need to use these config files? I am unable to start NAMENODE and DATANODE services from this. What are the required config changes ? Can any one guide me to the proper link which has all installation steps ? Please Help. Thanks Rohit Sarewar * *
