基于LVS的音视频集群系统的研究与实现

发布时间：2018-10-12 15:28

【摘要】：随着移动网络基础设施的不断完善,网络应用也逐渐与日常生活紧密相连,诸如:社交活动、电子商务等等。网络应用的普及致使服务器连接量成指数形式增长,用户接入量的急剧增长加重了服务器的负荷。因此,设计出高效的服务器集群系统才能有效地根除这一难题。本文首先研究了SIP(Session Initiation Protocol)服务器、STUN(Simple Traversal of UDP over NATs)服务器以及TURN(Traversal Using Relays around NAT)服务器的系统架构以及业务逻辑实现,并结合PJSIP实现了基本的音视频会话系统。然后,本文设计了一套高效的用户管理服务器,以便有效地管理用户群体,该系统专门设计了一种基于TCP的通信协议以及一种全新的健康检查系统。最后,为了能够有效地均衡整个音视频服务器系统,在LVS(Linux Virtual Server)集群技术的基础上,针对不同真实服务器的业务逻辑特点,本文提出了一种新型负载均衡调度策略。与此同时,在LVS静态WLC(Weighted Least-Connection Scheduling)调度策略的基础上,部署了一种应用动态负反馈的服务器均衡系统,该系统会按时获取各个真实服务器的负载权值,并根据服务器真实负载状况来分配任务请求。本文对WLC动态负反馈调度算法以及新型均衡策略进行了大量的测试和数据采集,经过对数据的认真整理与详细分析,我们发现,本文架设的音视频服务器集群系统以及动态负反馈调度算法在一定程度上提升了整个音视频通信的性能。
[Abstract]:With the continuous improvement of mobile network infrastructure, network applications are gradually closely linked to daily life, such as: social activities, e-commerce and so on. With the popularity of network applications, the number of server connections has increased exponentially, and the rapid increase of user access has increased the load of servers. Therefore, the design of an efficient server cluster system can effectively eradicate this problem. This paper first studies the system architecture and business logic implementation of SIP (Session Initiation Protocol) server, STUN (Simple Traversal of UDP over NATs) server and TURN (Traversal Using Relays around NAT) server and implements the basic audio and video session system with PJSIP. Then, a set of efficient user management server is designed in order to manage the user group effectively. This system specially designs a communication protocol based on TCP and a new health check system. Finally, in order to effectively balance the whole audio and video server system, based on the LVS (Linux Virtual Server) cluster technology, this paper proposes a new load balancing scheduling strategy according to the business logic characteristics of different real servers. At the same time, based on the LVS static WLC (Weighted Least-Connection Scheduling) scheduling strategy, a dynamic negative feedback server balancing system is deployed, which can obtain the load weights of each real server on time. The task request is assigned according to the actual load condition of the server. In this paper, the dynamic negative feedback scheduling algorithm of WLC and the new equalization strategy are tested and collected. After careful analysis of the data, we find that, In this paper, the audio and video server cluster system and the dynamic negative feedback scheduling algorithm improve the performance of the whole audio and video communication to a certain extent.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP368.5

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