The Application And Research Of Cache Technology Based On WWW

In recent years, the high speed development of internet has brought people enormous convenience, at the same time people are eager to experience higher and higher accessing speed of internet. However along with the promotion of the software and hardware installed in the server and the increase in the network band width, the speed of response which user feels to the system does not have the corresponding increase actually, even more and more slow.It is one of the most effective solutions which can enhance the system performance of WWW system and at the same time does not increase the cost of one enterprise.This thesis analysis the current typical system design model and development model on WWW application system, and thoroughly analysis system design as well as code realization which influences system performance greatly.WWW application system is composed by the dynamic content and the static content. This article has outlined the theory which can accelerate the accessing speed to the static content in detail in WWW system in the 3rd chapter.The dynamic content is raising the proportion more and more in the current application system. It is the key point which this article studies to the dynamic content acceleration solution. It proposes two kinds of acceleration solution and implementation in detail to the dynamic content by using cache technology, these acceleration solutions are general, which may be suitable for any application systems based on WWW and websites. This article analysis the crucial question— cache replacement arithmetic and cache synchronization arithmetic in using cache technology, in this foundation,it proposes one new cache replacement idea — one cache replacement strategy based on the retrieve times and the update times compared to as well as one new cache synchronization algorithm — a new cache synchronization algorithm based on the time stamp of one entity. Compared with the ordinary cache replacement algorithm,the former not only pay attention to cache replacement but also attach importance to cache synchronization. It decreasecache synchronization cost and can improve the hit rate of the cache even more.the later compares the timestamp of cache content with the timestamp of original content in order to guarantee the cache information freshness when a request is prosessed. This algorithm has high efficiency characteristic in performance, simpleness characteristic in implemention.This thesis finally discusses the actual effect of cache technology mentioned in this article in a e-government system,and has made the performance test. The test result indicats that, this cache solution can promote system performance greatly, enhance the system concurrent access numbers, reduce the response time remarkably.