关键词: 分布式代理，流媒体服务，缓存技术，数据放置，算法分析

Abstract: With the improvement of the high-bandwidth access technologies, multimedia streaming has experienced quickly development, and has wide application prospect As an important solution for reducing the load of server, improving the response time for customers, the steaming proxy technique has become one of the most popular research fields in the streaming research community. This paper presented an optimized data placement scheme for distributed caching system. hhe idea of the proposed scheme is to put the cache data into a particular proxy server, in order to minimize the transmission cost of data accessing in future. hhe simulation results demonstrate that our proposed algorithm achieves smaller transmission cost and has better scalability comparing with traditional cache data placement scheme.

Key words: Distributed proxy, Media streaming service, Cache technology, Data placement, Analysis of algorithm