基于响应时间的Web服务器性能评测方法

Towards to Evaluating Performance of Web Server Based on Response Time

Web服务器的性能评测是Web服务容量规划和服务部署中的重要问题.针对目前方法在评测实际应用场景中的不足,根据峰值负载之前响应时间与用户请求量存在的指数关系,提出Web服务器性能评测模型MBRT(Web Server performance evaluation Model Based on Response Time),根据响应时间建模可以避免分析的不全面,有效的避免传统模型的局限性,然后基于MBRT提出具体评测方法,同时使用一元线性回归模型的显著性特征验证MBRT的准确性.最后为了显示MBRT的有效性和高效性,在Web服务器实际评测环境中对MBRT进行验证和评估,并与已有模型进行比较.

Performance evaluation of Web Server plays an important role in in performance analysis,evaluation and capacity planning.It also can be used to control the overload of a Web server and guide the allocation of resources.As a result,there have been many works focused on evaluating the performance of Web servers by a special evaluation model effectively and accurately.These works can be mainly divided into two types： 1） Analysis/simulation based model,2） Measurement based model.Because many factors are not found in the simulated environment,and we cannot predict that which factors may been discovered in some real environment using the former.The latter often evaluates the performance of a Web server according to the utilization of resource,like CPU,memory and disk.However,resource is not the only one that affected the performance of a Web server.In order to solve the problems,we propose a Web Server performance evaluation Model Based on the Response Time-MBRT.The idea of model is the exponential relationship between Response Time and users′ requests before Web servers attach the peak load.This can ensure us analyze the real application in the round and avoid the limitations of traditional model.We also give the evaluation process using MBRT.Furthermore,the correctness of MBRT is verified with unary regression.At last,the tests are conducted in real applications.By comparing to some existing model,the test results show the effectiveness and efficiency of MBRT.