A Media Sensitive Cache Replacement Algorithm

Current cache management algorithms mainly focus on how to improve the cache‘s hit rate and use an access-based placement policy that places a data block into a buffer cache at the block‘s access time, while seldom consider the effect of the speed characteristic of cache media and data source on the whole system performance. In this paper, we propose a novel cache management algorithm ? C-Aware, which brings high performance and scalability for distributed system. C-Aware algorithm traces history response times of cache and data source, adaptively decides whether to cache data according to current access environment, and achieves good performance regardless of the server is busy or not. Our experiments show that, in the scenario where local cache size is half of total test data, C-Aware gets near 80% improvement compared with traditional methods when the server is not busy and still presents comparable performance when there is high workload on server side.