This is the documentation for CDH 4.7.1.
Documentation for other versions is available at Cloudera Documentation.

What's New in CDH4

CDH4 contains many changes and enhancements when compared to previous releases. For details about the changes in CDH4, see the CDH4 Release Notes, and specifically the section New Features. For links to the detailed change lists that describe the bug fixes and improvements to all of the CDH4 projects, see the packaging section of CDH Version and Packaging Information.