| 摘要(英) |
Client-server structure is widely applied in variety of services today. Though the cost for deploying this structure is relatively inexpensive, limited bandwidth is the main problem. Peer-to-Peer (P2P) technology gives us a hand for solving this shortcoming described above. Clients in P2P network are not just clients but also act as servers.
Recently, BitTorrent (BT, P2P system) has become popular because of its efficiency. The reason why BT works so well is due to its content-exchange policy inclusive of “choke algorithm”, ” peer selection”, and ” piece selection”. There’s no doubt BT achieves the goal for file content delivery, however, lack of locality-aware causes huge cross-domain traffic. In Internet Service Provider’s opinion, since P2P traffic is so huge that to be out of control, the best way to maintain other service is to take restrictive policy. Hence we propose a new method named “Locality-aware P2P system based on cache collaboration” to solve this problem. In this system,“Enhanced Tracker” appropriately dispatches peer list while “Super Peer Cache (SPC)” makes peers become locality-aware and work collaboratively. In this way, goal for saving cross-domain traffic is achieved. Further, the SPC provides a backup support and applies encoding-based replacement scheme to avoid specific file blocks disappear due to peer leaving. |
| 參考文獻 |
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