NDLI: Embedded cost model in mobile agents for large scale query optimization

Content Provider	IEEE Xplore Digital Library
Author	Hussein, M. Morvan, F. Hameurlain, A.
Copyright Year	2005
Description	Author affiliation: Inst. de Recherche en Informatique de Toulouse, Univ. Paul Sabatier, Toulouse (Hussein, M.; Morvan, F.; Hameurlain, A.)
Abstract	Execution plans generated by traditional optimizers for large scale distributed queries can be sub-optimal because: the estimations are inaccurate, the data are unavailable and the execution environment is unstable. To deal with the sub-optimality, we propose to execute each relational operator of an execution plan by a mobile agent. A mobile agent can change its execution site in order to correct the sub-optimality. In this paper, we address the problem of choosing an execution site for a mobile agent among execution sites of the considered system. For this, we propose to integrate a cost model into the mobile agents. We define also the various interactions that might occur between a mobile agent and its execution site. The performance evaluation shows that the cost model embedded in the agent allows to choose the most appropriate execution site
Sponsorship	Region Nord Pas de Calais France Telecom USTL CNRS LIFL IBM IEEE Sect. France INRIA
Starting Page	199
Ending Page	206
File Size	6355840
Page Count	8
File Format	PDF
ISBN	0769524346
DOI	10.1109/ISPDC.2005.23
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-07-04
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cost function Mobile agents Large-scale systems Query processing Delay Bandwidth Estimation error Distributed databases IP networks Data structures
Content Type	Text
Resource Type	Article

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