Book Image

Learning Informatica PowerCenter 10.x - Second Edition

By : Rahul Malewar
Book Image

Learning Informatica PowerCenter 10.x - Second Edition

By: Rahul Malewar

Overview of this book

Informatica PowerCenter is an industry-leading ETL tool, known for its accelerated data extraction, transformation, and data management strategies. This book will be your quick guide to exploring Informatica PowerCenter’s powerful features such as working on sources, targets, transformations, performance optimization, scheduling, deploying for processing, and managing your data at speed. First, you’ll learn how to install and configure tools. You will learn to implement various data warehouse and ETL concepts, and use PowerCenter 10.x components to build mappings, tasks, workflows, and so on. You will come across features such as transformations, SCD, XML processing, partitioning, constraint-based loading, Incremental aggregation, and many more. Moreover, you’ll also learn to deliver powerful visualizations for data profiling using the advanced monitoring dashboard functionality offered by the new version. Using data transformation technique, performance tuning, and the many new advanced features, this book will help you understand and process data for training or production purposes. The step-by-step approach and adoption of real-time scenarios will guide you through effectively accessing all core functionalities offered by Informatica PowerCenter version 10.x.
Table of Contents (20 chapters)
Title Page
Credits
About the Author
Acknowledgement
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Types of Lookup cache


Cache is the temporary memory that is created when you execute the process. It is created automatically when the process starts and is deleted automatically once the process is complete. The amount of cache memory is decided based on the property you define in the transformation level or session level. You usually set the property as default, so as required, it can increase the size of the cache. If the size required for caching the data is more than the cache size defined, the process fails with the overflow error. There are different types of caches available.

Building the Cache - Sequential or Concurrent

You can define the session property to create the cache either sequentially or concurrently.

Sequential cache

When you select to create the cache sequentially, Integration Service caches the data in a row-wise manner as the records enter the lookup transformation. When the first record enters the lookup transformation, lookup cache gets created and stores the matching...