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3 réponses
Hi Selma;
To efficiently solve the materialized view selection problem, an optimal genetic algorithm of how to select a set of views to be materialized is proposed so as to achieve both good query performance and low view maintenance cost under a storage space constraint. First, a pre-processing algorithm based on the maximum benefit per unit space is used to generate initial solutions. Then, the initial solutions are improved by the genetic algorithm having the mixture of optimal strategies. Furthermore, the generated infeasible solutions during the evolution process are repaired by loss function. The experimental results show that the proposed algorithm outperforms the heuristic algorithm and canonical genetic algorithm in finding optimal solutions.
I hope that is not late for you :)
so, I'm ready for any other questions ... take care
Friendly, Soka
if u want, send me mails at sokaruh@yahoo.fr
To efficiently solve the materialized view selection problem, an optimal genetic algorithm of how to select a set of views to be materialized is proposed so as to achieve both good query performance and low view maintenance cost under a storage space constraint. First, a pre-processing algorithm based on the maximum benefit per unit space is used to generate initial solutions. Then, the initial solutions are improved by the genetic algorithm having the mixture of optimal strategies. Furthermore, the generated infeasible solutions during the evolution process are repaired by loss function. The experimental results show that the proposed algorithm outperforms the heuristic algorithm and canonical genetic algorithm in finding optimal solutions.
I hope that is not late for you :)
so, I'm ready for any other questions ... take care
Friendly, Soka
if u want, send me mails at sokaruh@yahoo.fr
.nono.
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90
Date d'inscription
jeudi 7 juin 2007
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Membre
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3 juillet 2007
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9 juin 2007 à 15:16
9 juin 2007 à 15:16
Can you talk in french >.>