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A Queuing Model for Evaluating the Transfer Latency of Peer-to-Peer Systems

机译:对等系统传输延迟评估的排队模型

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摘要

This paper presents a queuing model to evaluate the latency associated with file transfers or replications in peer-to-peer (P2P) computer systems. The main contribution of this paper is a modeling framework for the peers that accounts for the file size distribution, the search time, load distribution at peers, and number of concurrent downloads allowed by a peer. We propose a queuing model that models the nodes or peers in such systems as M/G/1/K processor sharing queues. The model is extended to account for peers which alternate between online and offline states. The proposed queuing model for the peers is combined with a single class open queuing network for the routers interconnecting the peers to obtain the overall file transfer latency. We also show that in scenarios with multipart downloads from different peers, a rate proportional allocation strategy minimizes the download times.
机译:本文提出了一种排队模型,以评估与点对点(P2P)计算机系统中的文件传输或复制相关的延迟。本文的主要贡献是为对等方建立了一个建模框架,该框架考虑了文件大小分布,搜索时间,对等方的负载分布以及对等方允许的并发下载次数。我们提出了一种排队模型,该模型对诸如M / G / 1 / K处理器共享队列之类的系统中的节点或对等节点进行建模。扩展了该模型以解决在联机和脱机状态之间交替的对等项。为对等点提议的排队模型与用于互连对等点的路由器的单个类开放排队网络相结合,以获得总体文件传输延迟。我们还显示,在具有来自不同对等方的分段下载的情况下,比率分配策略可以最大程度地减少下载时间。

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