Exigency-based real-time scheduling policy to provide absolute QoS for web services / Política de escalonamento de tempo real baseada em exigência para provisão de QoS absoluto em serviços Web

AUTOR(ES)

Lucas dos Santos Casagrande

DATA DE PUBLICAÇÃO

2007

RESUMO

The present work presents a study, implementation and validation in a simulated environment of a real time scheduling policy to provide absolute QoS for web services. Synthesizing characteristic from real time scheduling, low latency and feedback scheduling, the proposed policy allows an adjustment weighed by the quantification of the exigency which the system is exposed through its classes. The goal is to offer immediate actions to most urgent requests, without decreasing the system quality as a whole. It was verified that the scheduling strategy based on exigency (EBS - Exigency-Based Scheduling) helps to control the quality of service offered. Scheduling in order to avoid imposing a heavy load to the system gives more condition to the server to fulfill the requirements agreed. Another goal of this work is the creation of a metrics to evaluate the client satisfaction. The results achieved with the EBS policy indicate a higher quality of service and better client satisfaction

ASSUNTO(S)

web web qos qos tempo-real real-time

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