关键词: 网格环境, 信任机制, 调度模型, 服务质量, 价格

Abstract: This paper proposes a hierarchical task scheduling model that divides the task scheduling into two parts, the choice of the resource site and local scheduling within the resource site, and in the first part, it introduces trust mechanism. Then it presents the appropriate algorithm, which not only takes the trust relationship between girding entities, the requirements of QoS and price factors into account, but also adjusts their weights dynamically in the exchange. The final simulization and anlysis show the model can effectively increase the security and efficiency of the Grid system.

Key words: grid environment, trust mechanism, scheduling model, Quality of Service（QoS）, price