Experimental Study of Parallel Downloading Schemes for Internet Mirror Sites
Experimental Study of Parallel Downloading Schemes for Internet Mirror Sites
复制标题
互联网镜像站点并行下载方案的实验研究
DOI：
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复制
发表时间：
2007
期刊：
影响因子：
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通讯作者：
S. Philopoulos
中科院分区：
文献类型：
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作者：
S. Philopoulos
减少文档检索时间的一种常用方法是使用内容复制，即镜像服务器。镜像服务器提供几个备选站点来下载特定的文档，传统上用于增加内容的可用性。最近，一些研究集中于使用多个镜像站点同时从一组镜像站点下载文档的部分内容。以下是同时使用多个镜像站点所涉及的一些问题：(a)从客户端选择“最佳”镜像服务器，(b)处理网络和服务器的动态过载，以及(c)处理故障。本文简要地研究了两种现有的并行下载或并行访问下载方案，或称为并行加载。它提出了第三种并行加载方案，称为动态并行访问。实验验证了该方案的性能。还讨论了进一步改进的建议。
A common method used to reduce document retrieval times is the use of content replication i.e., mirror servers. The mirror servers provide several alternate sites to download a specific document and were traditionally used to increase the availability of content. Recently, several studies focused on using multiple mirror sites to concurrently download portions of a document from a set of mirror sites. Following are some of the issues involved in using multiple mirror sites concurrently: (a) selection of the “best” mirror servers from the client, (b) coping with dynamic overloading of the network and servers, and (c) coping with faults. This paper briefly examines two existing schemes for concurrent downloading or parallel-access downloading, or paraloading as it is called. It proposes a third paraloading scheme called the Dynamic Parallel Access. The performance of this scheme is experimentally evaluated. Recommendations for further improvements are also discussed.