Controle de Admissão para QoS em Sistemas Distribuídos Híbridos, Tolerantes a Falhas

• Sérgio Gorender UFBA
• Raimundo José de Araújo Macêdo UFBA
• Waltemir Lemos Pacheco Júnior UFBA

DOI: https://doi.org/10.5753/wtf.2010.23095

Abstract

Hybrid distributed systems have synchronous and asynchronous processes and communication channels. Depending on the amount of synchronous components in this system, it is possible to solve classical problems of distributed systems, such as consensus, with a higher level of fault tolerance. Hybrid models for fault tolerant distributed systems have been presented with these features. Synchronous communication channels can be obtaines through the use of QoS Architectures. These architectures, while based on different mechanisms, usually show some kind of service that provides a communication isochronous service (synchronous channel). Admission control mechanisms are fundamental for providing isochronous services for new communication channels. Using this mechanism it is possible to ensure that there is no overloading of the network resources reserved for the isochronous classe of service. In this paper we present an admission control module for the QoS Provider, which is a mechanism for managing QoS and is used by models for hybrid distributed systems such as HA and Spa.

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