本文選題：負(fù)載均衡 + 負(fù)載衡量��； 參考：《北京郵電大學(xué)》2014年碩士論文

【摘要】：營業(yè)廳聯(lián)播系統(tǒng)可以通過網(wǎng)絡(luò)和管理平臺將運(yùn)營商營業(yè)廳中的電視、自助終端、電子屏幕等設(shè)備統(tǒng)一聯(lián)網(wǎng),以管理網(wǎng)站的形式對所有的顯示設(shè)備及播放內(nèi)容進(jìn)行統(tǒng)一管理,從整體上提高服務(wù)質(zhì)量和客戶的認(rèn)可度。隨著終端數(shù)量的增加,營業(yè)廳聯(lián)播系統(tǒng)產(chǎn)生了獲取任務(wù)不及時(shí)、播放內(nèi)容不同步甚至服務(wù)器宕機(jī)等故障,追根究底在于不能將到來的請求根據(jù)服務(wù)器性能和當(dāng)前的負(fù)載情況進(jìn)行合理分配。負(fù)載均衡技術(shù)提供了一種擴(kuò)展服務(wù)器帶寬并且增加服務(wù)器吞吐量的廉價(jià)有效的方法。 本文通過分析營業(yè)廳聯(lián)播系統(tǒng)的集中高并發(fā)的功能點(diǎn)(主要包括任務(wù)獲取和素材下載),論證了建立一個(gè)獨(dú)立的、引入負(fù)載均衡機(jī)制的文件管理子系統(tǒng)和實(shí)現(xiàn)動態(tài)負(fù)載均衡機(jī)制的必要性,并進(jìn)行了文件管理子系統(tǒng)和動態(tài)負(fù)載均衡機(jī)制的設(shè)計(jì)實(shí)現(xiàn),使得營業(yè)廳聯(lián)播系統(tǒng)易于擴(kuò)展,并且能夠?qū)⒃L問請求根據(jù)當(dāng)前服務(wù)器的負(fù)載動態(tài)分配到不同的服務(wù)器上。其中,文件管理子系統(tǒng)劃分為應(yīng)用層、數(shù)據(jù)訪問層和數(shù)據(jù)層,應(yīng)用層用于聯(lián)播系統(tǒng)與其他業(yè)務(wù)系統(tǒng)的對接,并且設(shè)立了單獨(dú)的一層實(shí)現(xiàn)基于IP散列的負(fù)載均衡,有利于系統(tǒng)的并發(fā)；數(shù)據(jù)訪問層消除了并發(fā)瓶頸,可以根據(jù)系統(tǒng)壓力情況調(diào)整部署；數(shù)據(jù)層則使用數(shù)據(jù)中心集群的方式組建。在動態(tài)負(fù)載均衡機(jī)制的設(shè)計(jì)過程中,通過對聯(lián)播系統(tǒng)負(fù)載的分析確定了磁盤密集型和CPU密集型的功能點(diǎn),設(shè)計(jì)了訪問局部性控制策略,并且對服務(wù)器當(dāng)前負(fù)載采用了CPU資源,內(nèi)存資源,帶寬資源,當(dāng)前連接數(shù)的四元組進(jìn)行描述,從而實(shí)現(xiàn)動態(tài)負(fù)載均衡。 此外,本文還對文件管理子系統(tǒng)和動態(tài)負(fù)載均衡機(jī)制做了功能測試和性能測試,驗(yàn)證了該系統(tǒng)的可行性。最后對論文工作進(jìn)行了總結(jié)和展望,建議從易用性、開放性方面進(jìn)行進(jìn)一步改進(jìn)。
[Abstract]:Through the network and management platform, the joint broadcasting system of the business hall can unify the TV, self-help terminal, electronic screen and other equipment in the business hall of the operator, and manage all the display equipment and the broadcast content in the form of managing the website. Improve the quality of service and customer recognition as a whole. With the increase in the number of terminals, the business hall broadcast system has caused problems such as the acquisition task is not timely, the broadcast content is out of sync and even the server is down. The bottom line is that incoming requests cannot be properly distributed according to server performance and current load conditions. Load balancing technology provides a cheap and effective way to expand server bandwidth and increase server throughput. This paper analyzes the centralized and high concurrency function points of the business hall multicast system (mainly including task acquisition and The material download demonstrates the establishment of an independent, The paper introduces the file management subsystem of load balancing mechanism and the necessity of realizing dynamic load balancing mechanism, and designs and implements the file management subsystem and dynamic load balancing mechanism, which makes the business hall broadcast system easy to expand. And the access request can be dynamically distributed to different servers according to the load of the current server. The file management subsystem is divided into application layer, data access layer and data layer. The application layer is used to connect the broadcast system with other business systems, and a separate layer is set up to realize load balancing based on IP hash. The data access layer eliminates the concurrency bottleneck and can be adjusted and deployed according to the pressure of the system. The data layer is constructed by using the data center cluster. In the design process of dynamic load balancing mechanism, the disk intensive and CPU-intensive function points are determined by analyzing the load of the multicast system, and the access local control strategy is designed, and the CPU resource is used for the current load of the server. Memory resources, bandwidth resources and quaternions of current connection numbers are described to achieve dynamic load balancing. In addition, this paper also makes functional tests and performance tests on file management subsystem and dynamic load balancing mechanism. The feasibility of the system is verified. Finally, the paper is summarized and prospected, and further improvement is suggested from the aspects of usability and openness.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TP393.07

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本文編號：1982192