Yahoo! have released the Yahoo! Distribution of Hadoop — a source code distribution that is based entirely on code found in the Apache Hadoop project. This source distribution includes code patches that we have added to improve the stability and performance of our clusters.
The Yahoo! Distribution of Hadoop can be downloaded from:
http://github.com/yahoo/hadoop-common/tree/yahoo-hadoop-0.20
If you want an installable image of the code, Cloudera has included the Yahoo! Distribution of Hadoop in raw package form available at: