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arXiv 1303.6323cs.NI
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P2P网络上有限无标度拓扑的构造

Constructing Limited Scale-Free Topologies Over Peer-to-Peer Networks

Eyuphan Bulut, Boleslaw K. Szymanski

摘要:

覆盖网络拓扑结构、节点/数据组织和搜索算法是非结构化对等(P2P)网络的关键组成部分,因为它们直接影响此类网络上的搜索效率。无标度(幂律)覆盖网络拓扑是为这些网络提供高性能的结构之一。这些拓扑结构的一个关键问题是存在集线器,具有高连通性的节点。然而,在典型的非结构化P2P网络中的对等体可能不愿意或不能够应对这样的高连接性及其相关联的负载。因此,一些硬截止值通常被施加在每个节点可以具有的边的数量上,将可行的覆盖限制在有限或截断的无标度网络中。在本文中,我们分析了这种有限的无标度网络的增长,并提出了两种不同的算法来构建完美的无标度覆盖网络拓扑结构在这种增长的每个实例。我们的算法允许用户定义所需的scalefree指数(伽玛)。当网络从一个规模增长到另一个规模时,它们还引起低通信开销。使用广泛的模拟,我们证明,这些算法确实产生完美的无标度网络(在网络增长的每一步),提供更好的搜索效率,在各种搜索算法比现有的解决方案所产生的网络。

英文摘要:

Overlay network topology together with peer/data organization and search algorithm are the crucial components of unstructured peer-to-peer (P2P) networks as they directly affect the efficiency of search on such networks. Scale-free (powerlaw) overlay network topologies are among structures that offer high performance for these networks. A key problem for these topologies is the existence of hubs, nodes with high connectivity. Yet, the peers in a typical unstructured P2P network may not be willing or able to cope with such high connectivity and its associated load. Therefore, some hard cutoffs are often imposed on the number of edges that each peer can have, restricting feasible overlays to limited or truncated scale-free networks. In this paper, we analyze the growth of such limited scale-free networks and propose two different algorithms for constructing perfect scale-free overlay network topologies at each instance of such growth. Our algorithms allow the user to define the desired scalefree exponent (gamma). They also induce low communication overhead when network grows from one size to another. Using extensive simulations, we demonstrate that these algorithms indeed generate perfect scale free networks (at each step of network growth) that provide better search efficiency in various search algorithms than the networks generated by the existing solutions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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