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From "Henjarappa, Savitha" <savitha.henjara...@hp.com>
Subject RE: Hadoop Cluster
Date Thu, 24 Jan 2013 09:25:28 GMT
Thank you so much for your quick response.

From: Mohammad Tariq [mailto:dontariq@gmail.com]
Sent: Tuesday, January 22, 2013 11:51 PM
To: user@hadoop.apache.org; Bejoy Ks
Subject: Re: Hadoop Cluster

The most significant difference between the two, as per my view, is that HA eliminates the
problem of 'NN as the single point of failure'. For a detailed info I would suggest you to
visit the official web site. You might also find this link<http://blog.cloudera.com/blog/2011/02/hadoop-availability/>
useful which talk about HA in great detail.

For your second question you can follow Bejoy sir's answer.

Warm Regards,

On Tue, Jan 22, 2013 at 11:37 PM, <bejoy.hadoop@gmail.com<mailto:bejoy.hadoop@gmail.com>>
Hi Savitha

HA is a new feature n hadoop introduced in Hadoop 2.x releases. So It is a new feature on
top of Hadoop cluster.

Ganglia is one of the widely used tools to monitor the cluster in detail. On a basic hdfs
and mapreduce level, the JobTracker and NameNode web UI would give you a good consolidation
on hadoop cluster.
Bejoy KS

Sent from remote device, Please excuse typos
From: "Henjarappa, Savitha" <savitha.henjarappa@hp.com<mailto:savitha.henjarappa@hp.com>>
Date: Tue, 22 Jan 2013 12:22:21 +0000
To: user@hadoop.apache.org<mailto:user@hadoop.apache.org><user@hadoop.apache.org<mailto:user@hadoop.apache.org>>
ReplyTo: user@hadoop.apache.org<mailto:user@hadoop.apache.org>
Subject: Hadoop Cluster


I am trying to understand the difference between HA cluster and Hadoop cluster. Can this group
help me understand, how differently Hadoop cluster should be monitored?


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