Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/9748
Title: Query optimization: mobile agents versus accuracy of the cost estimation
Authors: Özakar, Belgin
Morvan, Franck
Hameurlain, Abdelkader
Keywords: large scale heterogeneous databases
dynamic query optimization
mobile agents
cost model
Issue Date: 2005
Publisher: CRL Publishing
Abstract: Since an increasing number of diverse sources of data and information become available through World Wide Web, the field of distributed heterogeneous query processing attracts attention of the researchers. One of the main concerns is to reduce the amount of communication and the volume of data transferred in terms of query optimization where it is a real challenge to cave the statistics of the resources predictable and up-to-date. Autonomy, proactivity and mobility features of mobile agents seem promising under some conditions. In this paper we are interested in the study of the efficiency of the mobile agents in relation with the approach of the cost model used during the optimization process. We present an execution model based on mobile agents. Performance evaluation shows the efficiency intervals of the execution model according to the estimation errors and the current state of the system. The major contribution of this paper is to point out the effective use of an execution model based on mobile agents in relation with the approach of the cost model and with the query type.
URI: https://hdl.handle.net/11147/9748
ISSN: 0267-6192
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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