Apache Flume Component Guide
Also available as:

Flume 1.5.2 Documentation

See the complete Apache Flume 1.5.2 documentation for details about using Flume with Hortonworks Data Platform. The documentation is updated to reflect support for new features.

The Flume 1.5.2 documentation is also included with the Flume software. You can access the documentation in the Flume /docs directory.