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.
Sent from remote device, Please excuse typos
From: "Henjarappa, Savitha" <[EMAIL PROTECTED]>
Date: Tue, 22 Jan 2013 12:22:21
To: [EMAIL PROTECTED]<[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
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?