Windows Server AppFabric

AppFabric gives us a single unified view of the cache for distributed applications. Just read about this in MSDN.

Key Features of AppFabric (http://msdn.microsoft.com/library/cc645013.aspx)

• Caches any serializable CLR object and provides access through simple cache APIs.
• Supports enterprise scale: tens to hundreds of computers.
• Configurable to run as a service accessed over the network
• Supports dynamic scaling-out by adding new nodes.
• Backup copy provides high availability.
• Automatic load balancing.
• Integration with administration and monitoring tools such as PowerShell, Event Tracing for Windows, System Center, etc.
• Provides seamless integration with ASP.NET to be able to cache session data in without having to write it to source databases. It can also be used as a cache for application data to be able to cache application data across the entire Web farm.
• Follows the cache-aside architecture (also known as Explicit Caching) for V1. That is, you must decide explicitly which objects to put/remove in your applications and the cache does not synchronize with any source database automatically.

how to install and configure AppFabric : http://www.hanselman.com/blog/CategoryView.aspx?category=AppFabric

you can read more details on this from my colleagues blog : http://abdulrafaysbiztalk.wordpress.com/