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针对多媒体应用的负载特点,运用随机运筹学的原理,建立了用于数字媒体资料存储的光盘库的性能解析模型。由于该解析模型包含驱动器服务队列和机械手服务队列两个相互嵌套的模型,所以采用迭代方法对该模型进行求解,给出了光盘库性能模型的解析公式,对基于多媒体负载的光盘库性能做了分析。通过光盘库的事件驱动的仿真模型,进行了光盘库性能的仿真实验。分析和实验结果表明,多媒体负载下影响光盘库响应时间的关键参数是请求到达率以及驱动器的数目和速度。仿真实验验证了该文给出的性能解析模型是正确的。
According to the load characteristics of multimedia applications, the principle of stochastic operations research was used to establish the performance analysis model of optical disk library for digital media data storage. Since the analytical model contains two mutually nesting models of driver service queue and robot service queue, an iterative method is used to solve the model. The analytical formula of optical disk library performance model is given, and the performance of optical disk library based on multimedia load Analysis. Through the CD-ROM event-driven simulation model, the performance of the CD-ROM simulation experiments. Analysis and experimental results show that the key parameters that affect the response time of optical disk library under multimedia load are the request arrival rate and the number and speed of drivers. Simulation results show that the performance analysis model given in this paper is correct.