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Title |
Research Approach Advance in Concurrency Management Algorithms for Cooperative Work |
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Author |
Eric Garcia, Herv? Guyennet, Julien Henriet, Jean-Christophe Lapayre |
| Citation |
Vol. 25 No. 10 pp. 1-12 |
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Abstract |
This article presents a study and the development of protocols for concurrency problems in cooperative work applications.We first present our platform, which allows us to create cooperative applications without having to manage communications, consistency and synchronization. In this CORBA bus based platform, we can distinguish services for continuous stream transport and services for cooperation. We place special emphasis on these last services and especially on the two protocols involved : the Pilgrim and the Chameleon. We show the approach that induces us to evolve from the Pilgrim protocol to the Chameleon protocol. The Pilgrim is a token ring based protocol, which orders access on shared objects to allow the management of concurrency problems. But the main default of a token ring based protocol is to visit all sites including no-producers, therefore we have developed the Chameleon protocol, which allows the virtual topology to be reconfigured. We describe these two protocols, we show their performance and we demonstrate their qualities. |
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Keywords |
Concurrency Protocols, Cooperative Work, Distributed Algorithms,Performance. |
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