内容分发网络调度系统的研究与实现

发布时间：2018-03-02 15:46

本文选题：内容分发网络　切入点：全局服务器负载均衡　出处：《华南理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：21世纪互联网迅速发展普及，人们通过上网获取信息，与朋友通信交流，观看电影等。互联网极大地提高了人们的工作效率，丰富了人们的精神生活。与此同时，，随着使用互联网的人越来越多，互联网的内容也以几何增长方式迅速膨胀，互联网变得越来越拥挤。由于缺乏必要的流量管理和疏通手段，骨干带宽被迅速消耗掉，IP网络流量秩序濒于失衡。基于这个问题，互联网提出一种叫做CDN的解决方案，CDN的全称是ContentDeliveryNetwork，即内容分发网络。其目的是通过在现有的Internet中增加一层新的网络架构，将网站的内容发布到最接近用户的网络"边缘"，使用户可以就近取得所需的内容，解决Internet网络拥挤的状况，提高用户访问网站的响应速度。从技术上全面解决由于网络带宽小、用户访问量大、网点分布不均等原因所造成的用户访问网站响应速度慢的问题。随着CDN技术的不断发展，现在的CDN解决方案已经不在满足于简单的通过增加边缘服务来提升用户体验，而是需要一套智能的，实时感应用户服务质量和实时网络质量的系统。通过获取到实时的网络情况，分析用户访问的最佳链路，为用户提供最好的节点服务，从而提升用户的访问质量。本文选择“内容分发网络调度系统的研究与实现”作为研究课题，通过研究内容分发系统的调度策略，通过基于IP归属地区和运营商的分析和内容分发系统各个节点的实时带宽IO统计，综合分析从而实现内容分发网络智能调度。本系统研究和实现的关键点在于，如何能够智能地进行网络流量调度和节点间的负载均衡调度。最后设计实现CDN全局负载均衡调度系统，实现网站节点间的智能调度，提升用户的访问资源下载速度，提高用户的访问体验。另外也保障各服务节点的负载均衡，从而使服务资源能够充分利用，提高效率。
[Abstract]:In 21th century, the Internet was rapidly developed and popularized. People get information through the Internet, communicate with friends, watch movies, etc. The Internet has greatly improved people's working efficiency and enriched people's spiritual life. At the same time, As more and more people use the Internet, the content of the Internet expands rapidly in a geometric way, and the Internet becomes more and more crowded. Due to the lack of necessary traffic management and dredging means, Backbone bandwidth is rapidly consumed and IP network traffic order is on the verge of imbalance. The Internet proposes a solution called CDN, the full name of which is content delivery Network, which aims to add a new layer of network architecture to the existing Internet. By publishing the content of the website to the "edge" of the network closest to the user, the user can obtain the required content in the vicinity, solve the congested condition of the Internet network, and improve the response speed of the user to visit the website. The problem of slow response of users to visit websites caused by the large number of users and uneven distribution of sites. With the development of CDN technology, Today's CDN solution is no longer satisfied with simply enhancing the user experience by adding edge services, but requires an intelligent set of solutions. The system of real-time sensing user quality of service and real-time network quality. By obtaining the real-time network situation, analyzing the best link accessed by the user, providing the best node service for the user, thus improving the user's access quality. In this paper, "the Research and implementation of content Distribution Network scheduling system" is selected as the research topic, and the scheduling strategy of the content Distribution system is studied. Through the analysis based on IP ownership area and operator and the real-time bandwidth IO statistics of each node in the content distribution system, the intelligent scheduling of content distribution network is realized by comprehensive analysis. The key point of this system research and implementation lies in, How to intelligently schedule network traffic and load balancing between nodes. Finally, the CDN global load balancing scheduling system is designed and implemented. In addition, it also ensures the load balance of each service node, so that the service resources can be fully utilized and the efficiency can be improved.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.02

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