P2P VOD系统中频道间的网络规模差异性会引起的系统整体的缓存能力不均衡,并因此造成大量冷门频道上的缓存能力不能满足数据需求.针对此问题本文提出一种新的数据缓存策略,通过提高单频道的缓存利用率,并构建多频道重叠网来优化系统整体的缓存能力分布,从而达到提升冷门频道的缓存能力的目的.实验仿真数据表明,此数据缓存策略通过均衡频道间的缓存能力,能有效提高系统整体服务能力.
Various channels' network scale difference in a P2P VOD system, which causes the whole system's caching-capability imbalance, results in a problem that a mass of unpopular channels' caching-capability can' t satisfy data requirement. In order to solve the problem, this paper proposes a new data-caching mechanism, which improves each channel' s caching-utility efficiency and constructs a multi-channel overlay to optimize the whole system' s caching-capability. So that unpopular channels' caching-capability can be improved greatly. Our experimental results show that this mechanism can achieves obvious effect.