用户驱动的流媒体动态分段缓存调度策略  

Dynamic segmentation cache schedule strategy of streaming media by object driven

作　　者：董刚刚[1] 陈利[1] 刘灵敏[1] 刘静[1] 

机构地区：[1]华中师范大学计算机科学系,湖北武汉430079

出　　处：《计算机工程与设计》2009年第17期4035-4037,4052,共4页Computer Engineering and Design

摘　　要：在设计分布式流媒体代理缓存结构时,需要注意的两个主要方面是如何节省网络带宽和提高缓存命中率。基于此,提出了一种动态分段的流媒体代理缓存策略(SDD),该策略结合用户访问的趋势,并考虑不同网络用户的带宽和各媒体之间的差异,真正实现了流媒体对象的动态分段缓存。分析表明该缓存策略能普遍地适用于不同网络的大多数用户,不仅能够提高用户的请求命中率,同时还能提高缓存的利用率。In the designing of distributed streaming media proxy cache structure, it needs to pay attention to two major aspects of how to save network bandwidth and improve the hit rate. A dynamic segmentation strategy of streaming media （SDD） is presented, which is not only taking into account the different bandwidth and network users, but also the differences between the various media, and aims at dynamic segmentation and caching. Analysis shows that the strategy is widely applicable to the majority of users of different network bandwidth, which not only help to improve the hit rate request, but also have a good efficiency in the utilization of the proxy cache.

关 键 词：流媒体 代理缓存 动态分段 缓存效率 批处理补丁 

分 类 号：TP37[自动化与计算机技术—计算机系统结构]