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Re: How to disable secondary node
then, do not start secondary namenode
(
 comment the last line of start-dfs.sh
 #  "$bin"/hadoop-daemons.sh --config $HADOOP_CONF_DIR --hosts masters
start secondarynamenode
)

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 .
>
> Regards
> Akhilesh
>
> -----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
> responsibilities,
>  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?
>
> Thanks.
>
> Shen
>
>

--
Best Regards

Jeff Zhang