Jaco, There is no BackupNode in 1.x. The docs were by mistake, see http://search-hadoop.com/m/RMLq71stu6W.
Also, we're removing BackupNode and CheckpointNode in future (trunk for now) in favor of HA NameNodes and the SecondaryNameNode. On Thu, Oct 25, 2012 at 8:13 PM, Jaco Joubert <[email protected]> wrote: > Hi, > > I installed version 1.0.3 of Hadoop and I'm interested in running the > BackupNode. > The user guide explains the BackupNode and how to configure / start it: > http://hadoop.apache.org/docs/r1.0.3/hdfs_user_guide.html#Backup+Node > I'm having difficulty starting the BackupNode and I assume that either the > documentation is out-of-synch, or the BackupNode is not really supported in > 1.0.3. I say this because: > > The documented command to start the BackupNode doesn't exist: > bin/hdfs namenode -checkpoint > (the "hdfs" script doesn't exist at all) > > I also tried the "bin/hadoop namenode" command, but it only supports these > arguments: > Usage: java NameNode [-format] | [-upgrade] | [-rollback] | [-finalize] | > [-importCheckpoint] > > Am I doing something wrong, or is the BackupNode not supported in 1.0.3 (and > therefore the documentation incorrect)? > > Regards, > Jaco -- Harsh J
