Scalable Maintenance for Strong Web Consistency in Dynamic Content Delivery Overlays

Scalable Maintenance for Strong Web Consistency in Dynamic Content Delivery Overlays
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可扩展维护,以实现动态内容交付覆盖中的强大 Web 一致性

DOI:
10.1109/icc.2007.289
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发表时间:
2007
期刊:
2007 IEEE International Conference on Communications
影响因子:
--
通讯作者:
Y. Yasuda
Y. Yasuda
中科院分区:
--
文献类型:
--
作者:
Zhou Su;J. Katto;Y. Yasuda

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内容交付覆盖通过在通过互联网互连的一组地理上分布的站点上复制Web内容来提高最终用户的性能。然而,随着覆盖系统能够管理动态变化的文件的发展,一个需要解决的重要问题是一致性管理,这意味着如果原始文件发生变化,不同站点上的缓存副本必须进行更新。本文基于对象新鲜度、Web访问分布和网络拓扑的解析公式,推导出一种新的算法:(1)对于在原始服务器上发生更改的给定内容,只更新其有限数量的副本,而不是更新所有副本。(2)选择副本更新后,最新版本将从算法决定的站点发送,而不是从其原始服务器发送。仿真结果表明,该算法在降低旧命中率和网络流量的同时,提供了比传统方法更好的一致性管理。
Content Delivery Overlays improves end-user performance by replicating Web contents on a group of geographically distributed sites interconnected over the Internet. However, with the development whereby overlay systems can manage dynamically changing files, an important issue to be resolved is consistency management, which means the cached replicas on different sites must be updated if the originals change. In this paper, based on the analytical formulation of object freshness, Web access distribution and network topology, we derive a novel algorithm as follows: (1) For a given content which has been changed on its original server, only a limited number of its replicas instead of all replicas are updated. (2) After a replica has been selected for update, the latest version will be sent from an algorithm-decided site instead of from its original server. Simulation results verify that the proposed algorithm provides much better consistency management than conventional methods with the reduced the old hit ratio and network traffic.
使用具有自适应段分配的分层分布式代理进行流缓存
DOI: --
发表时间: 2003
期刊: IEICE Transactions on Communications E86-B No.6
影响因子: --
作者:
S.Zhou;J.Katto;T.Nishikawa;M.Murakami;Y.Yasuda
通讯作者: Y.Yasuda
集成预取和替换算法,实现优雅的图像缓存
DOI: --
发表时间: 2003
期刊: IEICE Transactions on Communications E86-B No.9
影响因子: --
作者:
S.Zhou;T.Washizawa;J.Katto;Y.Yasuda
通讯作者: Y.Yasuda