【摘要】 针对超节点P2P系统的特点,提出了一种有效且灵活的缓存策略。该策略使用文件价值来决定缓存替换的对象,并且在替换之前使用"阈值"选择要缓存的文件,使其系统只缓存价值较大的热点文件。最后通过Trace-Driven的方法模拟实验,结果表明,与现有的缓存策略LRU和LFU相比,这种缓存策略具有较好的缓存命中率和字节命中率。更多还原

【Abstract】 This paper presents an effective and flexible caching strategy according to the characteristics of super-peer P2P system. It uses file cost to determine the object which will be replaced in the cache, and before that uses threshold value to select the file being cached. It makes the system only cache the valuable and hot files. Finally the trace-driven simulation, results show that this caching strategy achieves better performance in terms of the hit ratio and the byte hit ratio compared with the LRU and LFU.更多还原