一种适用于VoD/P2P的存储调度策略  

New Scheduling Policy for Peer-to-peer Based Video-on-demand Storage

作　　者：沈时军[1] 李三立[1] 

机构地区：[1]清华大学计算机科学与技术系,北京100084

出　　处：《小型微型计算机系统》2011年第2期203-207,共5页Journal of Chinese Computer Systems

摘　　要：近年来,基于对等网络的视频点播系统(VoD/P2P)备受人们关注.在这类系统中,存储的难点主要表现为VoD应用中庞大的视频数与P2P网络中有限的存储资源之间的矛盾.提出对等数据随机访问的存储策略(Equivalent Data Random Access,EDRA),并重点研究了如何采用EDRA对VoD/P2P系统的存储进行优化调度,以最小化系统的资源占用或最大化系统的容量.实验表明,EDRA可以达到很高的节点带宽利用率,在相同条件下支持的最大点播数可能比传统方案高出58-73%.Recently, Peer-to-Peer based Video-on-Demand systems （VoD/P2P） have received a lot of research focus. Due to the high storage requirements in VoD and the limited storage resources in P2P networks, the storage design for these systems is challenging. In this paper~ we propose a new storage strategy, Equivalent Data Random Access （EDRA）, with the objective of system resource mini- mization, or system capacity maximization. Our experiments reveal that EDRA is effective for VoD/P2P storage. Compared with tradi- tional strategies, EDRA can improve the system capacity by 58 - 73 percent in terms of the number of concurrent users.

关 键 词：对等网络 视频点播 存储调度 冗余编码 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]