...
To learn about best monitoring practices, see http://www.cloudera.com/blog/2009/11/hadoop-world-monitoring-best-practices-from-ed-capriolo/
Here are some additional links where you can learn Learn more:
- http://www.jointhegrid.com/hadoop/ (Hadoop, cacti-jtg is designed for graphing JMX attributes from Hadoop)http://support.hyperic.com/display/hypcomm/hadoop