Proceedings of the international workshop on Workshop on multimedia information retrieval
Bandwidth trading in BitTorrent-like P2P networks for content distribution
Computer Communications
Optimization of an eMule-like modifier strategy
Computer Communications
Exploiting semantic proximities for content search over p2p networks
Computer Communications
Peer-to-peer vs. client/server: reliability and efficiency of a content distribution service
ITC20'07 Proceedings of the 20th international teletraffic conference on Managing traffic performance in converged networks
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The performance of Peer-to-Peer (P2P) content distribution networks depends highly on the coordination of the peers. Sophisticated cooperation strategies, such as the multiple source download, are the foundation for efficient file exchange. The detailed performance of the strategies are determined by the peer characteristics and the peer behaviour, such as the number of parallel upload connections, the selfishness, or the altruistic re-distribution of data. The purpose of this work is to evaluate and investigate different cooperation strategies for multiple source download and select the best one for a scenario for even leeching peers, i.e. peers which depart as soon as they have finished their download. The question arises whether the cooperation strategy can smoothen the overall performance degradation caused by a selfish peer behaviour. As performance indicator the evolution of the numbers of copies of a chunk and the experienced download times of files is applied. The considered scenarios comprise best-case (altruistic peers) and worst-case scenarios (selfish peers). We further propose a new cooperation strategy to improve the file transfer even when mainly selfish peers are present, the CygPriM (cyclic priority masking) strategy. The strategy allows an efficient P2P based content distribution using ordered chunk delivery with only local information available at a peer.