Políticas para servidores web baseados em sessões visando qualidade e diferenciação de serviços / Policies to web servers based on sessions aiming quality and differentiation of services
AUTOR(ES)
Alessandra Kelli Barbato
DATA DE PUBLICAÇÃO
2008
RESUMO
This work considers policies for Web servers based on sessions, aiming at the guarantees of Quality of Service (QoS) to the systems users. Two types of policies are considered: the responsible for the differentiation of services and the responsible for the admission control. Some scheduling algorithms had been developed to offer better services for the priority sessions: the Session Based Scheduling Algorithm (SBSA) and the Session Based Scheduling Algorithm with Differentiation of Services (SBSA-DS). In relation to the admission control, two new policies had been considered, which use different parameters to help the decisions and have as objective guarantee the finalization of as many priority sessions as possible. From the obtained results of the experiments realized by mean of simulation, it is evidenced that the use of the developed algorithms and policies improves the attendance of the sessions that deserve preferential service. Therefore, in Web servers worried in the guarantee the QoS for their users, which interact with the system by sessions, the use of these new techniques reveals adequate
ASSUNTO(S)
controle de admissão quality of service (qos) qualidade de serviço (qos) sessão schedule algorithm algoritmo de escalonamento session web server admission control servidor web
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