Book Image

Oracle Coherence 3.5

By : Aleksandar Seovic
Book Image

Oracle Coherence 3.5

By: Aleksandar Seovic

Overview of this book

Scalability, performance, and reliability have to be designed into an application from the very beginning, as there may be substantial cost or implementation consequences if they need to be added down the line. This indispensible book will teach you how to achieve these things using Oracle Coherence, a leading data grid product on the market.Authored by leading Oracle Coherence authorities, this essential book will teach you how to use Oracle Coherence to build high-performance applications that scale to hundreds of machines and have no single points of failure. You will learn when and how to use Coherence features such as distributed caching, parallel processing, and real-time events within your application, and understand how Coherence fits into the overall application architecture. Oracle Coherence provides a solid architectural foundation for scalable, high-performance and highly available enterprise applications, through features such as distributed caching, parallel processing, distributed queries and aggregations, real-time events, and the elimination of single points of failure.However, in order to take full advantage of these features, you need to design your application for Coherence from the beginning. Based on the authors' extensive knowledge of Oracle Coherence, and how to use it in the real world, this book will provide you with all the information you need in order to leverage various Coherence features properly. It contains a collection of best practice-based solutions and mini-frameworks that will allow you to be more productive from the very beginning.The early chapters cover basics like installation guidelines and caching topologies, before moving on to the domain model implementation guidelines, distributed queries and aggregations, parallel processing, and real-time events. Towards the end, you learn how to integrate Coherence with different persistence technologies, how to access Coherence from platforms other than Java, and how to test and debug classes and applications that depend on Coherence.
Table of Contents (22 chapters)
Oracle Coherence 3.5
Credits
Foreword
About the author
Acknowledgements
About the co-authors
About the reviewers
Preface
12
The Right Tool for the Job
Index

Summary


In this chapter, we have discussed how to achieve performance, scalability, and availability, and how Coherence in particular can help.

In order to improve performance, you need to minimize both the latency and the amount of data that you move across the wire. Coherence features such as near caching and entry processors can help you achieve that.

Coherence really shines when it comes to improving the scalability of your application, as it allows you to scale the layer that is most difficult to scale—the data management layer. By adding Coherence to your architecture you can avoid the need to implement complex database scale-out strategies, such as database clustering or sharding.

To achieve high availability you need to remove single points of failure from the architecture. Although Coherence is highly available by design, you need to ensure that all other components are as well, by adding redundancy. Also, do not forget that you need to size the system properly and allow for failure. Otherwise, your "highly available" system might crash as soon as one of its components fails.

Finally, you have learned that performance, scalability, and availability cannot be added to the system as an afterthought, but need to be designed into the system from the very beginning, and measured and monitored both during development and in production.

Now, let's get our hands dirty and learn how to install and use Coherence.