Book Image

IBM WebSphere eXtreme Scale 6

By : Anthony Chaves
Book Image

IBM WebSphere eXtreme Scale 6

By: Anthony Chaves

Overview of this book

A data grid is a means of combining computing resources. Data grids provide a way to distribute object storage and add capacity on demand in the form of CPU, memory, and network resources from additional servers. All three resource types play an important role in how fast data can be processed, and how much data can be processed at once. WebSphere eXtreme Scale provides a solution to scalability issues through caching and grid technology. Working with a data grid requires new approaches to writing highly scalable software; this book covers both the practical eXtreme Scale libraries and design patterns that will help you build scalable software. Starting with a blank slate, this book assumes you don't have experience with IBM WebSphere eXtreme Scale. It is a tutorial-style guide detailing the installation of WebSphere eXtreme Scale right through to using the developer libraries. It covers installation and configuration, and discusses the reasons why a data grid is a viable middleware layer. It also covers many different ways of interacting with objects in eXtreme Scale. It will also show you how to use eXtreme Scale in new projects, and integrate it with relational databases and existing applications. This book covers the ObjectMap, Entity, and Query APIs for interacting with objects in the grid. It shows client/server configurations and interactions, as well as the powerful DataGrid API. DataGrid allows us to send code into the grid, which can be run where the data lives. Equally important are the design patterns that go alongside using a data grid. This book covers the major concepts you need to know that prevent your client application from becoming a performance bottleneck. By the end of the book, you'll be able to write software using the eXtreme Scale APIs, and take advantage of a linearly scalable middleware layer.

Related Content you might be interested in

Current Title:

Small book image
IBM WebSphere eXtreme Scale 6
Anthony Chaves
Nov, 2009 | 292 pages
No titles found
Table of Contents (15 chapters)
IBM WebSphere eXtreme Scale 6
IBM WebSphere eXtreme Scale 6
Credits
Credits
About the Author
About the Author
About the Reviewers
About the Reviewers
Preface
Preface
Free Chapter
1
What is a Data Grid
What is a Data Grid
Data grid basics
Getting IBM WebSphere eXtreme Scale
Setting up your environment
Hello, world!
Summary
2
The ObjectMap API
The ObjectMap API
Different kinds of maps
Get and put
Updating objects in the grid
Hash map refresher (or crash course)
Optimistic collisions
Deadlocks
Removing objects
FIFO queues
Unsupported methods
Wrapping up
Summary
3
Entities and Queries
Entities and Queries
Entities
Entity relationships
The Query API
Summary
4
Database Integration
Database Integration
You're going where?
Where does an IMDG fit?
JPALoader and JPAEntityLoader
Removal versus eviction
Write-through and write-behind
BackingMap and Loader
Summary
5
Handling Increased Load
Handling Increased Load
The building blocks
A basic deployment
Connecting to a distributed grid
Adding more containers
Partition placement
Capacity planning
Hitting the wall
Summary
6
Keeping Data Available
Keeping Data Available
Containers, shards, partitions, and replicas
Shard placement
Physical location
Preferred zones
Summary
7
The DataGrid API
The DataGrid API
What does DataGrid do for me?
Borrowing from functional programming
Aggregate results
Summary
8
Data Grid Patterns
Data Grid Patterns
XTP: Extreme Transaction Processing
Reference data and object duplication
Time-to-live keeps us out of trouble
Rely on partitions, not the entire grid
Summary
9
Spring Integration
Spring Integration
Injecting ObjectGrid instances
Spring-managed eXtreme Scale configuration
Transaction management
Summary
10
Putting It All Together
Putting It All Together
The bookmarks app
Caching more than ORM
Summary

Getting IBM WebSphere eXtreme Scale

IBM WebSphere eXtreme Scale is an in-memory data grid formerly known by the brand name Object Grid. There are two ways to get eXtreme Scale. First, eXtreme Scale is integrated with certain versions of IBM WebSphere Application Server. If you have a WebSphere Application Server 6.1 (or higher) deployment capable of integrating with WebSphere eXtreme Scale, then you should follow the instructions provided with your WebSphere software. WebSphere Application Server 6.1 contains additional features that are enabled only when WebSphere eXtreme Scale is present.

If you do not have an installation of WebSphere eXtreme Scale by using your WebSphere Application Server 6.1 license, then you can use the standalone edition. The standalone WebSphere eXtreme Scale trial edition is functionally equivalent to the full licensed version. Everything that can be done with the licensed edition can be done with the trial edition. The programming and configuration interfaces are identical. If you develop an application using the trial edition, it can be deployed to the full edition. All of the examples in this book have been tested with the WebSphere eXtreme Scale 6.1.0.4 FIX2 trial edition available as a multi-platform download. You can download the trial edition from IBM Developer Works at http://www.ibm.com/developerworks/downloads/ws/wsdg/. The file you're looking for is named objectgridtrial610.zip.

IBM strongly recommends that you use an IBM JVM for developing and running your WebSphere eXtreme Scale application. In the event that you use a non-IBM JVM, you should manually integrate the IBM Object Request Broker (ORB) with your JVM. Other ORBs might work, but they are not tested by IBM. The Sun JVM ORB does not work as of this writing. Please see http://www.ibm.com/developerworks/wikis/x/niQ for more information. You can download IBM Java developer kits from http://www.ibm.com/developerworks/java/jdk/. I created the examples with the IBM Development Package for Eclipse, though these examples will work with any of the JVMs listed there.

Previous Section
End of Section 3
Next Section