-Re: How to disable secondary node
Jeff Zhang 2010-09-09, 07:08
then, do not start secondary namenode
comment the last line of start-dfs.sh
# "$bin"/hadoop-daemons.sh --config $HADOOP_CONF_DIR --hosts masters
On Wed, Sep 8, 2010 at 11:36 PM, akhilesh.kumar
<[EMAIL PROTECTED]> wrote:
> Hi ,
> Can any one help me in disabling secondary namenode feature of hdfs .
> -----Original Message-----
> From: ChingShen [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, September 09, 2010 12:07 PM
> To: [EMAIL PROTECTED]
> Subject: Questions about BN and CN
> Hi all,
> I got the Backup node(BN) that includes all the checkpoint
> and it maintains an up-to-date namespace state, which is always in
> sync with the active NN.
> Q1. In which situation do we need a CN?
> Q2. If the NameNode machine fails, which different manual
> intervention between BN and CN?