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In current Peer-To-Peer (P2P) systems, system performance is evaluated by the metrics that characterize the features of the whole system while how each node in system affects the system performance is rarely considered. In this paper, the authors first introduce a new metric of publishing efficiency based on the impact of nodes' characters on the system performance. Then, they build an analytical model to study the relationship between nodes' characters and the ranges that resources of the nodes can serve queries when all nodes keep the same publishing efficiency. Based on the analytical results, they propose a new Differentiated Resource Publishing (DRP) architecture to keep nodes' publishing efficiency high.
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