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Services-Oriented Dynamic Reconfiguration Framework for Dependable Distributed Computing
COMPSAC '04 Proceedings of the 28th Annual International Computer Software and Applications Conference - Volume 01
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Smart monitors for composed services
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EDOC '05 Proceedings of the Ninth IEEE International EDOC Enterprise Computing Conference
Automatic Model-Driven Recovery in Distributed Systems
SRDS '05 Proceedings of the 24th IEEE Symposium on Reliable Distributed Systems
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EDCC '06 Proceedings of the Sixth European Dependable Computing Conference
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ICSOC '07 Proceedings of the 5th international conference on Service-Oriented Computing
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ICAC '08 Proceedings of the 2008 International Conference on Autonomic Computing
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Automated Software Engineering
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Architecting Dependable Systems VI
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Middleware'09 Proceedings of the ACM/IFIP/USENIX 10th international conference on Middleware
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Architecting Dependable Systems III
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ISAS'06 Proceedings of the Third international conference on Service Availability
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Service-oriented architectures (SOAs) are an approach to structuring software in which distributed applications are constructed as collections of interacting services. While they promise many benefits including significant cost savings through service reuse and faster application design and implementation, many of the very aspects that make SOAs attractive amplify the dependability challenges faced by distributed applications. This dependability dilemma becomes especially pronounced when the services making up an application are owned and managed by different organizations or are executed on resources owned and operated by third parties, such as cloud computing or utility computing providers. This paper reviews the vision of SOAs, and discusses the characteristics that make them particularly challenging for dependability. It then discusses techniques that have been proposed for building dependable SOAs and why a comprehensive solution remains elusive despite these efforts. Finally, we argue that--despite the fact that service independence is often cited as one of the main attractions of SOAs-- any successful solution requires collaborative quality of service (QoS) in which services, service providers, and resource providers cooperate to implement dependability. The primary goals of this paper are to highlight the dependability implications of architectures based on decoupled and independent services such as SOAs, and to suggest possible approaches to enhancing dependability by weakening these characteristics in a controlled way.