Building highly available enterprise applications using

web-oriented middleware is hard. Runtime

implementations frequently do not address the problems

of application state persistence and fault-tolerance,

placing the burden of managing session state and, in

particular, handling system failures on application

programmers. This paper describes Phoenix/APP, a

runtime service based on the notion of recovery

guarantees. Phoenix/APP transparently masks failures

and automatically recovers component-based

applications. This both increases application availability

and simplifies application development. We demonstrate

the feasibility of this approach by describing the design

and implementation of Phoenix/APP in Microsoft’s .NET

runtime and present results on the cost of persisting and

recovering component-based applications.

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In  IDEAS Conference

Publisher  IEEE Computer Society
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