WS-replication: a framework for highly available web services
Proceedings of the 15th international conference on World Wide Web
Sustaining Web Services High-Availability Using Communities
ARES '08 Proceedings of the 2008 Third International Conference on Availability, Reliability and Security
Flexible provisioning of web service workflows
ACM Transactions on Internet Technology (TOIT)
ICWS '08 Proceedings of the 2008 IEEE International Conference on Web Services
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Web services cannot be always available as they are typically deployed in a dynamic environment. As an effective approach to improving Web services availability, replication has received much attention recently. How to design an optimal replication scheme with the best QoS, however, remains an open problem due to its inherent computational hardness. In this paper, we propose an efficient approach to designing a near-optimal replication scheme. We adopt directed acyclic graph (DAG) as the modeling tool for replication scheme and then utilize DAG coding for performance optimization. Simulation results show our approach can generate a near-optimal replication scheme with acceptable computation overheads.