A Novel Hybrid Approach for Web Caching

Abstract

With the advancement of technology and development of many new applications now a days, the World Wide Web (WWW) suffers from scaling and reliability problems due to overloaded and congested proxy servers. Caching at local proxy servers helps, but cannot satisfy more than a third to half of requests, more requests are still sent to original origin servers. To address this issue, we propose a Hybrid Web Caching Algorithm (HWCA) for managing and searching in the cache of proxy servers. The algorithm uses Hierarchical Web Cache concepts along with static hierarchies with dynamic mechanism of proxy servers. Most of the requests are being satisfied through local proxy servers and very less requests are being fulfilled by remote origin servers. This mechanism keeps the congestion less on the network by using lesser bandwidth as most of the requests are satisfied from local sites. The proposed work is divided into three phases. The first phase is to characterize all the challenges in front of hybrid approach and all its viable study. In second phase, architecture is proposed for implementation of Hybrid Web Cache System. Third phase consists of the proposed algorithm for web caching. The performance of the proposed algorithm is evaluated using hit ratio and latency time of requests depending on varying cache sizes. The results obtained show that the proposed algorithm is effective in comparison to the existing techniques with respect to the above metrics.