Apache Hadoop 0.23
http://www.slideshare.net/hortonworks/apache-hadoop-023
Apache Hadoop 0.23 at Hadoop World 2011
http://www.slideshare.net/hortonworks/apache-hadoop-023-hadoop-world-2011
Hadoop World 2011: Hadoop and Performance
http://www.cloudera.com/resource/hadoop-world-2011-presentation-slides-hadoop-and-performance
An Introduction to HDFS Federation
http://developer.yahoo.com/blogs/hadoop/posts/2011/02/mapreduce-nextgen/
Hadoop0.23.0初探1---前因后果