本文選題：虛擬化 + Web服務(wù)器集群　； 參考：《國(guó)防科學(xué)技術(shù)大學(xué)》2014年碩士論文

【摘要】：隨著互聯(lián)網(wǎng)特別是移動(dòng)互聯(lián)網(wǎng)的不斷普及,網(wǎng)絡(luò)用戶(hù)規(guī)模急劇上升,各類(lèi)網(wǎng)絡(luò)應(yīng)用的可靠性和可用性面臨極大挑戰(zhàn)。為適應(yīng)挑戰(zhàn),虛擬化等相關(guān)技術(shù)得到飛速發(fā)展和廣泛應(yīng)用。越來(lái)越多的企業(yè)將Web應(yīng)用遷移到虛擬機(jī)上,借此提高資源利用率、提升系統(tǒng)可靠性、改善靈活性以及降低管理成本。在虛擬環(huán)境中搭建Web服務(wù)器集群系統(tǒng)來(lái)滿(mǎn)足性能不斷擴(kuò)展的需要,是目前比較普遍的解決方案。但如果簡(jiǎn)單的將傳統(tǒng)Web服務(wù)器集群搬至虛擬機(jī),既無(wú)法充分展現(xiàn)虛擬化技術(shù)的優(yōu)勢(shì),也很難克服傳統(tǒng)Web服務(wù)器集群調(diào)度器性能瓶頸的缺點(diǎn)。論文從概念上和功能上將虛擬化技術(shù)與Web服務(wù)器集群技術(shù)相結(jié)合,提出了一種虛擬化環(huán)境下的集群綜合性能管理模型XCluster。該模型采用分布式結(jié)構(gòu)實(shí)現(xiàn)集群的負(fù)載監(jiān)測(cè)、節(jié)點(diǎn)控制、任務(wù)調(diào)度和負(fù)載均衡。理論分析和實(shí)驗(yàn)結(jié)果表明,使用XCluster既能根據(jù)用戶(hù)訪問(wèn)請(qǐng)求的總量以及宿主機(jī)的空閑資源來(lái)調(diào)度虛擬機(jī),使得虛擬機(jī)在宿主機(jī)層按管理員定制的策略進(jìn)行分布,又能根據(jù)各后端節(jié)點(diǎn)的負(fù)載狀態(tài)分發(fā)用戶(hù)請(qǐng)求實(shí)現(xiàn)虛擬機(jī)層的負(fù)載均衡�；赬Cluster模型的Web服務(wù)器集群系統(tǒng)只需占用很少的網(wǎng)絡(luò)通信量就能完成信息收集和命令下達(dá)。與使用Nginx作為調(diào)度器的集群相比,在高可用性方面,產(chǎn)生的請(qǐng)求失敗數(shù)更少,系統(tǒng)可靠性更高,在負(fù)載均衡性能方面,活動(dòng)節(jié)點(diǎn)負(fù)載隨時(shí)間趨于一致,均衡效果較好,能適應(yīng)大規(guī)模并發(fā)請(qǐng)求,而且集群規(guī)模隨負(fù)載變化而動(dòng)態(tài)調(diào)整,在一定程度上更加節(jié)約系統(tǒng)資源。
[Abstract]:With the increasing popularity of the Internet, especially the mobile Internet, the scale of network users has risen sharply, and the reliability and availability of various network applications are facing great challenges. In order to adapt to the challenges, virtualization and other related technologies have been rapidly developed and widely used. More and more enterprises migrate Web applications to virtual machines to improve resource utilization, improve system reliability, improve flexibility and reduce management costs. It is a common solution to build Web server cluster system in virtual environment to meet the need of continuous expansion of performance. However, if we simply move the traditional Web server cluster to virtual machine, we can not fully show the advantages of virtualization technology, and it is difficult to overcome the shortcomings of traditional Web server cluster scheduler performance bottleneck. In this paper, we combine virtualization technology with Web server cluster technology conceptually and functionally, and propose a cluster integrated performance management model XClusterin virtualization environment. The model uses distributed structure to realize load monitoring, node control, task scheduling and load balancing. Theoretical analysis and experimental results show that using XCluster can not only schedule virtual machines according to the total number of user access requests and the idle resources of the host, but also make the virtual machines distribute in the host layer according to the strategy customized by the administrator. Furthermore, the load balancing of virtual machine layer can be realized by distributing user requests according to the load state of each back-end node. The Web server cluster system based on XCluster model can complete the information collection and command delivery with only a small amount of network traffic. Compared with the cluster which uses Nginx as scheduler, in high availability, the number of request failures is less, the system reliability is higher, and the load of active node tends to be consistent with time in load balancing performance, and the balance effect is better. It can adapt to large scale concurrent requests, and the cluster size is adjusted dynamically with the change of load, which saves system resources to a certain extent.
【學(xué)位授予單位】：國(guó)防科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TP393.09

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