Book Image

Oracle Information Integration, Migration, and Consolidation

Book Image

Oracle Information Integration, Migration, and Consolidation

Overview of this book

The book covers data migration, data consolidation, and data integration, the three scenarios that are typically part of the information integration life cycle. Organizations typically find themselves migrating data to Oracle and either later, or at the same time, consolidating multiple database instances into a single global instance for a department, or even an entire company. The business savings and technical benefits of data consolidation cannot be overlooked, and this book will help you to use Oracle's technology to achieve these goals. This highly practical and business-applicable book will teach you to be successful with the latest Oracle data and application integration, migration, information life-cycle management, and consolidation products and technologies.In this book, you will gain hands-on advice about data consolidation, integration, and migration using tools and best practices. Along the way you will leverage products like Oracle Data Integrator, Oracle GoldenGate, and SQL Developer, as well as Data Hubs and 11gR2 Database. The book covers everything from the early background of information integration and the impact of SOA, to products like Oracle GoldenGate and Oracle Data Integrator. By the end you'll have a clear idea of where information and application integration is headed and how to plan your own projects.
Table of Contents (17 chapters)
Oracle Information Integration, Migration, and Consolidation
Credits
About The Author
About the Contributing Authors
About the Reviewers
www.PacktPub.com
Preface

Oracle RAC


The core enabler for Oracle's Data Management capabilities revolves around Oracle Real Application Cluster (RAC) technology. There have been many discussions about RAC, so we don't have a lot of new things to say here, but it is certainly worth a mention at a high level. The following figure shows a typical RAC implementation. We can use this model to describe what RAC technology is.

Oracle RAC databases differ architecturally from single-instance Oracle databases in that each Oracle RAC database instance also has:

  • At least one additional thread of redo for each instance

  • An instance-specific undo table-space

The combined processing power of the multiple servers can provide greater throughput and Oracle RAC scalability than is available from a single server.

Traditionally, an Oracle RAC environment is located in one data center, but you can configure Oracle RAC on an extended distance cluster. This is an architecture which provides fast recovery from a site failure and allows for...