Web緩存與預取系統(tǒng)的設計與實現(xiàn)
[Abstract]:With the rapid development of Internet, with the rapid growth of network information and the number of users' access, the existing network bandwidth can no longer meet the service requests of users. How to improve the speed of user request access and the overall performance of the network has become an urgent problem. Caching and prefetching technology is an effective solution. Based on the access characteristics of Web and the interest of users, the cache replacement algorithm is improved, and the Web cache and prefetching technology are combined. The hit rate of cache system is improved effectively and the network performance is improved. Most of the existing Web cache replacement strategies only consider the cost of obtaining Web objects, and the reference factor is single, which leads to low cache hit rate. This paper first analyzes the characteristics of user's Web access behavior, and combines the degree of interest of user and the type of Web object, on the basis of GDSF algorithm, adds consideration to these factors, and proposes a new Web cache replacement policy GDSFI,. The performance is verified and compared by simulation experiment. Web prefetching is an effective supplement to cache technology. By predicting user behavior, the request of the next Web object can be completed within browsing time. In the design of prediction algorithm, users are extracted from the most popular N websites, and the most popular Web list in the popular field is obtained by statistics of the access log, which is the basis of prefetching. By combining prefetching and caching, we can cache a Web object and decide whether we need to prefetch or not, so that we can achieve higher cache performance. Through the combination of cache replacement strategy and cache prefetch operation, the cache hit rate and byte hit rate of the system can be improved effectively, and the network performance and quality of service can be improved.
【學位授予單位】:華中科技大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:TP393.07
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