【摘要】 提高视频点播系统性能的一个有效途径是提高缓存的利用率 ,进而使系统可容纳更多的媒体流 .间隔缓存 (IntervalCaching)是一种有效的缓存策略 .在间隔缓存的基础上提出了一种混合了静态和动态缓存策略特点的混合缓存策略 .通过对该策略进行缓存模型分析 ,对比了混合策略同间隔缓存策略的相关指标 ,结果说明 ,混合策略较间隔缓存策略有明显的改善 .更多还原

【Abstract】 A good aproach for improving the performance of VOD server is to increase the us ing efficiency of the cache. Several research have studied on this topic. In res pect that interval caching is a effective scheme, proposed a hybrid c aching scheme based on interval caching which blend some speciality of static an d dynamic caching scheme. Based on two drawback of interval caching, the author presented two corresponding methods for resolving. With an mathematical caching model, the paper compared the cache using of hybrid caching with that of interva l caching. As the author expected, the hybrid caching policy have a better cost -effectiveness t han interval caching. Especially, the improvement will be more distinct on condi tion that the time interval of a movie is short enough.更多还原