一种新型的Web应用可靠性评估工作量计算方法

A new measurement of workload in Web application reliability assessment

Web应用系统已经应用到各个领域,研究Web应用的可靠性日益重要.首先定义Web应用失效,引出了Web应用可靠性的概念;通过分析IIS日志数据,收集相应的用户操作和信息传送失效数据,从Web应用软件系统的角度探讨了基于日志的Web应用可靠性评估的可行性.基于网站用户群使用特征的规律性,提出了一种新型工作量计算方法,该方法首先运用平均加权技术进行无单位化处理,再设置目标函数经优化得到计算新型工作量的权量.最后通过实验验证了新型工作量的有效性.实验结果表明,采用新型工作量计算Web应用的可靠度稳定性较好,可信性较高.

Web application has been popular in various fields of social life. It becomes more and more important to study the reliability of Web application. In this paper the definition of Web application failure is firstly brought out,and then the definition of Web application reliability. By analyzing data in the IIS server logs and selecting corresponding usage and information delivery failure data,the paper study the feasibility of Web application reliability assessment from the perspective of Web software system based on IIS server logs. Because the usage for a Web site often has certain regularity,a new measurement of workload in Web application reliability assessment is raised. In this method,the unit is removed by weighted average technique;and the weights are assessed by setting objective function and optimization. Finally an experiment was raised for validation. The experiment result shows the assessment of Web application reliability base on the new workload is better.