计算机与现代化

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基于HLS流媒体集群动态反馈负载均衡算法

  

  1. (贵州大学计算机科学与技术学院,贵州贵阳550025)
  • 收稿日期:2018-08-24 出版日期:2019-04-08 发布日期:2019-04-10
  • 作者简介:杨炳钊(1993-),男,山东莱州人,硕士研究生,研究方向:计算机网络与流媒体技术,E-mail: 1042726229@qq.com; 李泽平(1964-),男,教授,硕士生导师,博士,研究方向:计算机网络与流媒体技术; 刘江涛(1991-),男,硕士研究生,研究方向:计算机网络与流媒体技术。
  • 基金资助:
    国家自然科学基金资助项目(61462014)

Dynamic Feedback Load Balancing Algorithm of Streaming Media Cluster Based on HLS

  1. (College of Computer Science and Technology, Guizhou University, Guiyang 550025, China) 
  • Received:2018-08-24 Online:2019-04-08 Published:2019-04-10

摘要: 面对移动视频用户大量的并发视频请求,为了解决流媒体集群节点负载反馈不及时、节点选择不精确、节点负载过重而导致用户满意度下降的问题,提出一种改进的动态反馈负载均衡算法。综合考虑静态和动态负载因子衡量各节点服务性能和当前负载,使用层析分析法计算负载权值向量;同时计算负载权值和引入容余负载,并对容余负载进行修正,使其更加精确地描述集群负载情况,改善了传统动态反馈负载均衡算法中请求数突增造成的负载倾斜。实验结果表明,算法实现了多节点负载动态平衡,提高了节点的利用效率。

关键词: 流媒体集群, 动态反馈, 层次分析法, 负载权值, 容余负载

Abstract:  Aiming at large number of concurrent video request for mobile video users, in order to solve the problems that the load feedback of streaming media cluster nodes is not timely, the node selection is not accurate, and the node load is too heavy, which leads to the user satisfaction degrading, this paper puts forward an improved dynamic feedback load balancing algorithm. The static and dynamic load factors are considered to measure the service performance and current load of each node. The load weight vector is calculated by using analytic hierarchy process; meanwhile the load weight is calculated, the residual load is introduced and modified, which makes the description of cluster load conditions more accurate, improves the load gradient caused by the sudden increase of requests in the traditional dynamic feedback load balancing algorithm. The experimental results show that the algorithm achieves multi-node load dynamic balance, improves the efficiency of the nodes.

Key words: streaming media clusters, dynamic feedback, analytic hierarchy process, load weight, residual load

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