With the falling price of memory, an increasing number of multimedia servers and proxies are now equipped with a large memory space. Caching media objects in memory of a proxy helps to reduce the network traffic, the disk I/O bandwidth requirement, and the data delivery latency. The running buffer approach and its alternatives are representative techniques to caching streaming data in the memory. There are two limits in the existing techniques. First, although multiple running buffers for the same media object co-exist in a given processing period, data sharing among multiple buffers is not considered. Second, user access patterns are not insightfully considered in the buffer management. This paper proposes two techniques based on shared running buffers (SRB) in the proxy to address these limits.
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