摘要： 通知服务现已广泛应用于分布式计算当中。通知服务的一个问题是对过载敏感。该文通过分析和仿真研究通知服务的运行性能，得出通知服务的最大允许消费者数与系统的利用率有直接的关系。提出一种通知服务性能的模糊控制机制，对系统的最大允许消费者数进行调节。对该机制进行了仿真实验，实验结果表明模糊控制对通知服务系统负载的变化和系统模型的变化有较强的适应能力，并且对随机负载控制能力比通常的控制器更加有效。

关键词: 通知服务, 模糊控制, 接纳控制, 仿真

Abstract: Notification service is increasingly being used in a wide variety of distributed computing systems. One problem with notification service is that it is sensitive to overload. By analyzing and simulating the performance of notification service, this paper reveals the relationship between maximum customers number permitted by notification service and utilizing rate of the system. Thus a fuzzy control mechanism of notification service performance is presented, to control and adjust maximum customers’ number of notification service system. Simulation experiment on mechanism is fulfilled. The outcome shows that fuzzy control can be accommodated to the change of notification service system load and system model more easily, and can control the load at random more efficiently than usual controller does.

Key words: Notification service, Fuzzy control, Admission control, Simulation