Dear all, I fixed the problem in the previous email by doing that on Ubuntu 10 instead of RedHat 9. RedHat 9 might be too old?
Thanks so much! Bing On Tue, Feb 14, 2012 at 1:00 PM, Bing Li <lbl...@gmail.com> wrote: > Dear all, > > I am a new user of HDFS. The default Data/Name directory is /tmp. I would > like to change it. The hdfs-site.xml is updated as follows. > > <property> > <name>dfs.replication</name> > <value>1</value> > <description>The actual number of replications can be specified when > the file is created.</description> > </property> > <property> > <name>hadoop.tmp.dir</name> > <value>/home/bing/GreatFreeLabs/Hadoop/FS</value> > </property> > <property> > <name>dfs.name.dir</name> > <value>${hadoop.tmp.dir}/dfs/name/</value> > </property> > <property> > <name>dfs.data.dir</name> > <value>${hadoop.tmp.dir}/dfs/data/</value> > </property> > > But when formatting by running the following command, I was asked to > format the /tmp. Why? > > $ hadoop namenode -format > Re-format filesystem in /tmp/hadoop-libing/dfs/name ? (Y or N) N > > Because the updated name node is not formatted, the name node cannot be > started. > > How to solve the problem? Thanks so much! > > Best regards, > Bing >