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Pentaho Data Integration 4 Cookbook

You're reading from   Pentaho Data Integration 4 Cookbook Over 70 recipes to solve ETL problems using Pentaho Kettle

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Product type Paperback
Published in Jun 2011
Publisher Packt
ISBN-13 9781849515245
Length 352 pages
Edition 1st Edition
Tools
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Toc

Table of Contents (17) Chapters Close

Pentaho Data Integration 4 Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
1. Working with Databases FREE CHAPTER 2. Reading and Writing Files 3. Manipulating XML Structures 4. File Management 5. Looking for Data 6. Understanding Data Flows 7. Executing and Reusing Jobs and Transformations 8. Integrating Kettle and the Pentaho Suite 9. Getting the Most Out of Kettle Data Structures Index

Generating a custom log file


When you run a transformation or a job, all of what is happening in the process is shown in the Execution Results window, which has a tab named Logging where you can check the execution of your transformation step by step. By default, the level of the logging detail is Basic, but you can change it to show different levels of detail.

Under the Logging tab, you can see information about how the step is performing, for example, the number of rows coming from previous steps, the number of rows read, the number of rows written, errors in execution, and so on. All this data is provided by the steps automatically, but what if you want to write your custom messages to the Logging information? To do this, there is a step and an entry named Write to log, in the Utility folder.

To put them into practice, let's take a simple transformation that reads a text file with book novelties and splits them into two Excel files depending on their price. The objective here is to include...

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