一种支持Web QoS的前置服务器解决方案

A New Prepositive Server Plan That Support Web QoS

服务质量(QoS)描述了一个产品或服务满足消费者需求的能力。如何为不同类型的用户提供区分服务正在引起研究领域的关注。通过改进Web服务器应用软件来提供Web QoS支持是一种非常直观的Web QoS控制思路,但在实际应用中却存在着通用性和可扩展性等方面的局限。以此思路为出发点,将QoS控制部分功能提取出来,在一个前置服务器中去实现,该服务器置于客户端与Web服务器中间,主要负责完成Web请求的截取、QoS控制及请求转发。实验证明以引入前置服务器的方式实现Web请求的QoS控制,能够保证高级别用户请求的较高完成率以及较低响应延时,以低优先级请求的尽早拒绝防止了服务器过载,有效地实现Web服务区分。

Quality of Service（QoS） describes the capabilities of a product or service to meet the requirements of consumers. The provision of guaranteed QoS is very critical to the success of Web. How to provide differentiated services for different types of users is an on going research direction in Web service community. By improving the Web server application software to provide support for the Web QoS is a very intuitive Web QoS control ideas. In practice, but there are limitations in versatility and scalability. As a starting point, QoS control functions are extracted and achieved in a preppsitive server in this paper. Prepositive server is in the middle of client and Web server and primarily responsible for Web requests interception ,QoS control and requests transmit. Experiment proved that this method can ensure the high - level user requests a higher completion rate and a low response delay, refuse low - priority request as soon as possible to prevent the overload of Web server. It can effectively provide differentiated services for different types of users.