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中文摘要：
GridSim模拟器是网格相关研究中通用的模拟、分析工具.为了进一步丰富GridSim模拟器功能以使其更好地支持算法、性能模拟,提出并实现了在GridSim中引入优先级的预留策略,扩充了GridSim的性能.在优先级预留系统中,对GridSim预留模块中已有的先来先服务（FCFS）预留调度算法进行了改进,将优先级与先来先服务相结合提出了一个新的预留调度算法ARWithPriorityPolicy.实验结果表明,结合优先级的预留调度算法可以有效减少被拒绝的预留请求数目.
英文摘要：
GridSim simulator is a general simulation and analysis tool for Grid related research. In order to further enrich its simulation functions to better support algorithms and performance simulation, a reservation strategy that priority should be introduced in GridSim is proposed and implemented. In the priorty -based reservation system, the existing first - come - first - serve （FCFS） scheduling algorithm in the reservation model of GridSim is enhanced, and a new reservation- based scheduling algorithm -ARWithPrlorityPolicy, wh;ch combines priority with FCFS, is put forward. The simulation results show that this reservation - based scheduling algorithm with priority can decrease the amount of reservation requests rejected effectively.
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