Book Image

Pentaho Data Integration Cookbook - Second Edition

Book Image

Pentaho Data Integration Cookbook - Second Edition

Overview of this book

Pentaho Data Integration is the premier open source ETL tool, providing easy, fast, and effective ways to move and transform data. While PDI is relatively easy to pick up, it can take time to learn the best practices so you can design your transformations to process data faster and more efficiently. If you are looking for clear and practical recipes that will advance your skills in Kettle, then this is the book for you. Pentaho Data Integration Cookbook Second Edition guides you through the features of explains the Kettle features in detail and provides easy to follow recipes on file management and databases that can throw a curve ball to even the most experienced developers. Pentaho Data Integration Cookbook Second Edition provides updates to the material covered in the first edition as well as new recipes that show you how to use some of the key features of PDI that have been released since the publication of the first edition. You will learn how to work with various data sources – from relational and NoSQL databases, flat files, XML files, and more. The book will also cover best practices that you can take advantage of immediately within your own solutions, like building reusable code, data quality, and plugins that can add even more functionality. Pentaho Data Integration Cookbook Second Edition will provide you with the recipes that cover the common pitfalls that even seasoned developers can find themselves facing. You will also learn how to use various data sources in Kettle as well as advanced features.
Table of Contents (21 chapters)
Pentaho Data Integration Cookbook Second Edition
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
References
Index

Processing multiple jobs or transformations in parallel


Running jobs or transformations serially is fine initially, but as more processes come online, the need for executing more in less time becomes very evident. Kettle has the ability to run multiple jobs and transformations at the same time, and in this recipe, we will be going over how to utilize this functionality for both jobs and transformations. The code for this recipe is available on the book's website.

How to do it...

Perform the following steps to learn how to execute job steps in parallel.

  1. Open Spoon and create a new job.

  2. Add a Start step to the canvas. Also, add three Transformation steps.

  3. Create a hop between the Start step and one of the Transformation steps. Repeat the process between the Transformation step and the other two Transformation steps. Your job should now look similar to the following:

  4. Right-click on the first Transformation step and select the Launch next entries in parallel option. Two parallel lines should now appear...