Jérôme Haubert

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For real-time DBMSs (RTDBMSs), both the integrity constraints of the database and the temporal constraints of the transactions must be respected. In this paper, we focus on the SCC real-time concurrency control protocol proposed by Bestavros et al. (1992, 1995, 1993). It is based on the duplication of the transactions and the use of the transaction(More)
A simulator is generally used to test the performances of the new protocols. RADEx is a simulator of RTDBMSs. It is powerful since it takes into account the main parameters relative to RTDBMSs. In this article, we want to give our contribution in the evolution of this simulator by making it easier to use and by integrating some new modules and concepts. The(More)
Le protocole SCC (Speculative Concurrency Control) est l'un des premiers protocoles de contrôle de concurrence des transactions temps réel. Il utilise la duplication des transactions et les estampilles des transactions pour résoudre les problèmes de conflits. Néanmoins, des problèmes subsistent dans son utilisation. Nous proposons une nouvelle extension de(More)
In distributed database systems, the main problem occurs when managing the transactions (concurrency control and commit). In real-time context, the problem is more complex, since these processes must be done with respect to the transaction deadlines. In this paper, we deal with the global distributed transaction commit and the local concurrency control(More)
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