Design of an embedded cost model for mobile queries
UbiMob '04 Proceedings of the 1st French-speaking conference on Mobility and ubiquity computing
Mobile join operators for restricted sources
Mobile Information Systems
A monitoring service for large-scale dynamic query optimisation in a grid environment
International Journal of Web and Grid Services
Performance improvement of join queries through algebraic signatures
International Journal of Intelligent Information and Database Systems
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In this paper, we study the contribution of the executionmodel based on mobile agents to the distributed dynamicquery optimization. We propose three cooperationmethods allowing to the agents, reacting to the estimationerrors, to move during the runtime. The performanceevaluation shows the superiority of one of these methods.It is more powerful than a standard execution startingfrom 30 % of estimation error and has a relatively smalloverhead compared to a standard execution when the estimationerror is small.