A Special Topology for Files Pre-Fetch in Large Scale Video on Demand

Current video on demand system requires a large number of users and a huge number of video files, then mounts of concurrent address on media server will burst the bandwidth requirements and content provider will pay more and more cost on it. Accordingly, new schemes to offload burden from media server becomes a crucial item. In this paper, we introduce a new topology based on two hierarchical DHT in P2P VoD system for video files pre-fetch, which are consisted three pre-fetching models. Through simulations, we demonstrate that the P2P VoD system with files pre-fetching in the topology can obtain a much high performance on media sever burden compared to that of without pre-fetching.