A big thanks to my employer Inquidia Consulting (http://www.inquidia.com) for allowing me to open source and make this plugin available.
The Tableau Data Extract plugin for Pentaho Data Integration allows you to use Pentaho's ETL capabilities blend data from multiple sources into a single Tableau Data Extract (tde) file. You can then publish the TDE file to a Tableau server or use the TDE in Tableau Desktop.
A Tableau Data Extract file is a compressed file specially optimized for Tableau performance. If you are familiar with Tableau, a TDE is what Tableau creates when you tell Tableau to perform extracts from a data source instead of connecting live. This plugin skips that step and goes directly to the TDE file format.