摘要
给出了一种基于最优路径的适用于分布式视频点播服务器系统的请求迁移算法,本算法以提高系统的用户请求接受率和降低带宽消耗为目标,在随机早期迁移算法基础上,根据系统负载均衡度和带宽消耗,动态地选择最优迁移路径。实验结果证明,与随机早期迁移算法相比,这种算法增强了系统各服务器间的负载均衡,在提高了请求接受率的同时降低了带宽消耗,从而提高了系统的总体性能。
An improved request migration algorithm based on optimal migration path is proposed, which is suitable to be used in distributed video-on-demand server system, the aim of the system is to improve the acceptance rate of user＇s request and reduce the bandwidth consumption. On the basis of the random early migration algorithm, the optimal migration path is dynamically chosen according to the degree of load balance and bandwidth consumption of the system. Simulation results show that, compared with the random early migration algorithm, the proposed algorithm has enhanced the system load balance among the servers, reduced bandwidth consumption, and increased the acceptance rate of user＇s request. Therefore the overall system performance is improved.
出处
《电子技术（上海）》
2009年第7期80-83,共4页
Electronic Technology
关键词
视频点播
请求迁移
负载均衡
带宽消耗
video-on-demand
request migration
load balancing
bandwidth consumption
