FAQ
Hi ,
Can any one help me in disabling secondary namenode feature of hdfs .

Regards
Akhilesh

-----Original Message-----
From: ChingShen
Sent: Thursday, September 09, 2010 12:07 PM
To: common-user@hadoop.apache.org
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

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