Research On WEB Caching Replacement And Prefetching Technology In Networked Auditing Platform

Recently, the audit work has changed from the stage of manual- auditing to the stage of computer-auditing. Network auditing platform is a web application that provides audit service to the auditors. In the construction of network auditing platform, the interdisciplinary, cross regional and other characteristics of the audit work, will cause delayed phenomenon when the remote users access the network auditing platform through internet to do audit work.Therefore we need to optimize the network auditing platform by use of Web cache technology.While the update frequency of the audit data that the network auditing platform relies on continues to accelerate, as well as constant update the audit methods and audit resources caused by the addition of the new audit field, thus the improvement of the cache cannot meet the needs of users. Therefore, the Web prefetching technology is added to the Web cache to forecast the user's access behavior.There are two main points of this paper as follows:1. The standard PPM model cannot well forecast the access behavior of the users in the network auditing platform,and with the growth of the usage time of the network auditing platform, the space occupation will be bigger and bigger. So on the basis of the standard PPM model, this paper gives NAPPM model which combining with the network auditing platform permissions model. According to the characteristics of the auditors' access, utilizing the impact of the audit project on auditors' access, adds the related information of the audit project in the process of model construction. At the same time, in order to reduce the space complexity of prefetching tree as much as possible, this paper does the pre pruning on the model input according to the web object's access frequency and whether the object belongs to the current audit project,and utilizes LRU with related information of the audit project to do post pruning on the model during the operation of the model.2. This paper discusses the PGDSF-NA cache replacement algorithm on the basis of GDSF cache replacement algorithm. Combined with the type of network auditing platform,this algorithm uses different methods of identification for different types of different cache resources. At the same time, there are two factors for evaluating the resources of network auditing platform. One factor is the average access frequency of the web objects based on the GDSF algorithm. The other factor is whether the replacement objects are in prefetch queue.This two factors will not only make replacement algorithm consider the characteristics of user history access,but also avoid the future access of replacement users to some degree.In all, in the use of network auditing platform, the combination of web cache and prefetch technique will effectively improve user experience as well as reduce user access latency.