Latest Pentaho Data Integration (aka Kettle) Documentation
Translated Kettle Documentation - Spanish - Korean - Russian
Quick Start and Overview
Pentaho Data Integration Home Page (News, Downloads, Forums, Bug tracking etc.)
Pentaho Data Integration (Kettle) Concepts, Best Practices and Solutions
Pentaho Documentation (User Guides, Tutorials and Walkthroughs, Installation and Upgrade, Administrator and Developer Guides)
Documentation for (Database) Developers and Users
Reference:
Highlighting New Features in PDI 6.0
Visit the Pentaho Help site to read more about what's new in Pentaho 6.0.
Highlighting New Features in PDI 5.0:
Please see the Pentaho Infocenter for more information about 'New Features for Pentaho Data Integration'
Books:
Pentaho Kettle Solutions- Building Open Source ETL Solutions with Pentaho Data Integration
Pentaho Solutions: Business Intelligence and Data Warehousing with Pentaho and MySQL
Other:
Kettle Exchange (share tips & tricks and utilities)
Migration:
Recent versions: see the PDI Upgrade Guide in the InfoCenter Installation and Upgrade Guides
For more recent versions, please see Pentaho's Infocenter
Documentation for (Java) Developers
PDI SDK: see "Embedding and Extending Pentaho Data Integration" within the Developer Guides.
Current Kettle Development & Archive
Further Links & Information
Pentaho Professional Services (Training, Support, Partners...)