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Multimedia Object Placement for Transparent Data Replication

机译：用于透明数据复制的多媒体对象放置

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摘要

Transparent data replication is a promising technique for improving the system performance of a large distributed network. Transcoding is an important technology which adapts the same multimedia object to diverse mobile appliances; thus, users' requests for a specified version of a multimedia object could be served by a more detailed version cached according to transcoding. Therefore, it is particularly of theoretical and practical necessity to determine the proper version to be cached at each node such that the specified objective is achieved. In this paper, we address the problem of multimedia object placement for transparent data replication. The performance objective is to minimize the total access cost by considering both transmission cost and transcoding cost. We present optimal solutions for different cases for this problem. The performance of the proposed solutions is evaluated with a set of carefully designed simulation experiments for various performance metrics over a wide range of system parameters. The simulation results show that our solution consistently and significantly outperforms comparison solutions in terms of all the performance metrics considered
机译：透明数据复制是一种用于改善大型分布式网络的系统性能的有前途的技术。代码转换是一项重要的技术，可以使同一多媒体对象适应各种移动设备。因此，可以通过根据转码缓存的更详细的版本来满足用户对多媒体对象指定版本的请求。因此，确定要在每个节点处缓存的适当版本以实现指定目的特别具有理论和实践上的必要性。在本文中，我们解决了透明数据复制中多媒体对象放置的问题。性能目标是通过同时考虑传输成本和代码转换成本来最小化总访问成本。我们针对此问题提供了针对不同情况的最佳解决方案。提议的解决方案的性能通过一组精心设计的仿真实验进行评估，以针对各种系统参数上的各种性能指标进行评估。仿真结果表明，在考虑到所有性能指标后，我们的解决方案始终显着优于比较解决方案

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