用按比例延迟分配算法提高Web服务的QoS

介绍了Web Services中QoS的概念，并且描述了一些关于QoS评价方面的技术和参数，同时，还分析了FCFS算法在延迟公平性和响应服务请求大小公平性方面的缺陷。为了克服这种服务质量不高、服务效果不好的情况，引出了将优先级算法和接比例分配延迟算法相结合的方法，同时，探讨了优先级划分方面要注意的一些问题。最后，证明了该算法在克服FCFS算法在延迟公平和服务请求大小区分方面不足的有效性。

Adopting measure of PDD to mend QoS in web service

The conception of QoS in web services is introduced and some technology and parameter about QoS estimating are described. Meantime, the FCFS arithmetic is analyzed in equity of delay and in equity of responding to different documents, further, fetch out the deficiency of FCFS in these aspects. For overcome this question, the arithmetic of combining PRI and process allocation strategy for proportional responsiveness differentiation are brought forward, and the question of partitioning priority is simply discussed. At last, it is proved this arithmetic could overcome the disadvantage of FCFS in delay equity and partition service.