Well after looking through Apache's documentation for different releases, I can
figure out that Checkpoint node and Backup node functionality if provided in
Hadoop v 0.21,0.22,0.23 only. It is not present in series of 0.20 and Hadoop
1.0.0
Please correct me if I am wrong. I think I got confused by reading the
HDFS_USER guide as it mentions checkpoint node and backup node.
-----Original Message-----
From: Stuti Awasthi
Sent: Friday, January 20, 2012 3:08 PM
To: hdfs-user@hadoop.apache.org
Subject: Query about Backup Node
Hi all,
I want to test Backup Node in Hadoop 1.0.0 for my 2 node cluster. Say machine A
is master and machine B I want to setup as Backup node. I removed entry from
"masters" file so that no SNN is started. I configured both machines similarly
just for testing want dfs to be started on machine A and backup started on B.
hdfs-site.xml:
<property>
<name>dfs.backup.address</name>
<value>B</value>
</property>
Slaves File:
A
Now I format machine A and start dfs :
./hadoop namenode -format
./start-dfs.sh
But I am not sure if Backup node is started. I think I am missing something.
How to get this working and test Backup node.
Thanks
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