Performance Study of Unstructured P2P Overlay Streaming Systems
Performance Study of Unstructured P2P Overlay Streaming Systems
复制标题
非结构化P2P叠加流系统的性能研究
DOI：
10.1109/icccn.2008.ecp.119
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Jehan
中科院分区：
文献类型：
--
作者：
Purvi Shah;Jawad Rasheed;Jehan
当前用于多媒体流的P2P解决方案之间的主要区别之一是它们组织对等端之间的多媒体数据交换的方式。我们比较了这两种组织的性能，即使用针锋相对激励策略的无限制Mesh和允许同级动态替换表现不佳的父母的有向Mesh。我们首先观察到，这两个组织在所有同行都在合作且连接从未失败的理想情况下表现得相当好。然后，我们考虑了同样的两个组织在存在连接故障的情况下将如何执行，并观察到唯一能够提供高服务质量的组织是不受限制的网状组织，其允许每个对等体至少八个并发下载。对于定向网格则不是这样，当我们允许四个以上的并发下载时，它的性能实际上会降低。
One of the major differences among current P2P solutions for multimedia streaming is the way they organize the exchange of multimedia data among their peers. We compare the performance of two of these organizations, namely, an unrestricted mesh using a tit-for-tat incentive policy and a directed mesh that allows peers to dynamically replace poorly performing parents. We first observe that both organizations performed fairly well under ideal circumstances where all peers were cooperating and connections never failed. We then considered how the same two organizations would perform in the presence of connection failures and observe that the sole organization capable of providing a high quality of service was an unrestricted mesh organization that allowed at least eight concurrent downloads per peer. The same was not true for the directed mesh whose performance actually decreased when we allowed more than four concurrent downloads.