【摘要】：當(dāng)今互聯(lián)網(wǎng)上充斥著巨大的流量,許多應(yīng)用的用戶數(shù)量都是百萬級(jí)的,導(dǎo)致單臺(tái)服務(wù)器很難承受大量客戶端的訪問,通常企業(yè)會(huì)使用分布式計(jì)算、負(fù)載均衡等技術(shù)來解決該問題。一種典型的負(fù)載均衡技術(shù)是使用一個(gè)專用負(fù)載均衡器把客戶端的請(qǐng)求分發(fā)給不同的服務(wù)器。這種技術(shù)不僅需要專用的硬件支持,而且存在諸多缺點(diǎn),主要體現(xiàn)在價(jià)格昂貴、缺乏靈活性和容易成為單點(diǎn)故障等。并且傳統(tǒng)負(fù)載均衡技術(shù)在數(shù)據(jù)中心虛擬化環(huán)境中受到限制,OpenFlow技術(shù)的提出不僅徹底改變了原有TCP/IP體系架構(gòu)而且為負(fù)載均衡帶來了新的解決方案。本文主要研究虛擬化環(huán)境下基于OpenFlow的服務(wù)器集群動(dòng)態(tài)負(fù)載均衡技術(shù),取得如下成果： (1)根據(jù)OpenFlow網(wǎng)絡(luò)特性提出了虛擬化環(huán)境下基于OpenFlow的負(fù)載均衡架構(gòu),并詳細(xì)介紹了實(shí)現(xiàn)該架構(gòu)的關(guān)鍵技術(shù)；介紹了OpenFlow網(wǎng)絡(luò)體系結(jié)構(gòu)、傳統(tǒng)負(fù)載均衡技術(shù)、網(wǎng)絡(luò)虛擬化技術(shù)和存儲(chǔ)區(qū)域網(wǎng)絡(luò)(SAN)。 (2)對(duì)傳統(tǒng)負(fù)載均衡算法進(jìn)行研究并提出了基于服務(wù)器運(yùn)行狀態(tài)的動(dòng)態(tài)反饋負(fù)載均衡算法(SBLB)。 (3)對(duì)整個(gè)負(fù)載均衡架構(gòu)進(jìn)行分層設(shè)計(jì),包括Floodlight控制器設(shè)計(jì)、服務(wù)器集群的設(shè)計(jì)以及對(duì)存儲(chǔ)網(wǎng)絡(luò)的設(shè)計(jì)。 (4)設(shè)計(jì)網(wǎng)絡(luò)測(cè)試場(chǎng)景,搭建負(fù)載均衡測(cè)試環(huán)境,使用LoadRunner對(duì)架構(gòu)進(jìn)行測(cè)量并分析使用不同負(fù)載均衡策略時(shí)的性能指標(biāo),證實(shí)了SBLB算法相比其他算法的優(yōu)越性,同時(shí)證實(shí)系統(tǒng)功能的正確性。 實(shí)驗(yàn)表明使用OpenFlow技術(shù)可以在虛擬化環(huán)境中實(shí)現(xiàn)靈活、強(qiáng)大、易用、性價(jià)比更高的負(fù)載均衡,可以更合理的利用資源,實(shí)現(xiàn)有效的負(fù)載均衡。
[Abstract]:Nowadays, the Internet is full of huge traffic, and the number of users in many applications is millions, which makes it difficult for a single server to support a large number of clients' access. Usually, the enterprise will use distributed computing. Load balancing and other techniques to solve this problem. A typical load balancing technique uses a dedicated load balancer to distribute client requests to different servers. This technology not only needs special hardware support, but also has many disadvantages, such as high price, lack of flexibility and easy to become a single point of failure. And the traditional load balancing technology is limited in the data center virtualization environment. The OpenFlow technology not only completely changed the original TCP/IP architecture but also brought a new solution for load balancing. This paper mainly studies the dynamic load balancing technology of server cluster based on OpenFlow in virtualized environment. The main achievements are as follows: (1) according to the characteristics of OpenFlow network, the load balancing architecture based on OpenFlow in virtualized environment is proposed. The key technologies to realize the architecture are introduced in detail. This paper introduces OpenFlow network architecture, traditional load balancing technology, network virtualization technology and storage area network (SAN). (2) Research on traditional load balancing algorithm and propose dynamic feedback load balancing algorithm (SBLB). Based on server running state. (3) hierarchical design of the whole load balancing architecture, including the design of Floodlight controller, the design of server cluster and the design of storage network. (4) designing network test scenario, setting up load balancing test environment, using LoadRunner to measure the architecture and analyzing the performance index when using different load balancing strategies, which proves the superiority of SBLB algorithm compared with other algorithms. At the same time, the correctness of the system function is verified. Experiments show that using OpenFlow technology can achieve flexible, powerful, easy to use, more cost-effective load balancing in the virtualization environment, can use resources more reasonably, and achieve effective load balancing.
【學(xué)位授予單位】：蘭州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TP393.06

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本文編號(hào)：2398547