Improved Scalability and Reliability | Introducing Microsoft Windows Server(TM) 2003

Here are some of the key scalability and reliability features that benefit developers and IT professionals in an application environment:

Asynchronous support.

The .NET Framework deeply integrates two asynchronous communication technologies for scalability and reliability: SOAP and MSMQ. This allows developers to build applications that are robust and can handle offline scenarios.
Web farm session state.

The process-independent, Web farm “compatible session state increases reliability and scalability by storing session state in a process external to the ASP.NET application; thus, the state can survive application crashes and be referenced from other machines in a Web farm.
IIS 6.0 fault-resilient process.

IIS 6.0 provides an architecture that delivers enhanced application isolation. Administrators can create multiple application pools and assign applications to those pools to provide isolation. Application pools can be monitored and automatically recycled to ensure application availability.
ADO.NET.

ADO.NET uses a nonpersistent connection and intelligent handling of state. ADO.NET actually sends XML messages between the data source and the application, opening and closing the connection as needed. The result is that applications scale much better with ADO.NET, and ADO.NET can work over many different network transports.

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