發(fā)布時間：2018-04-17 14:28

  本文選題：云計算 + 虛擬化��； 參考：《太原理工大學》2013年碩士論文

【摘要】：云計算被認為是繼PC、互聯(lián)網之后可能再一次改寫IT面貌的“第三次IT革命”,是少見的能夠同時引起互聯(lián)網、IT和電信行業(yè)共同關注的新領域。這就在于云計算是一個融合了互聯(lián)網商業(yè)模式的、革命性的IT技術和電信服務運營的新生事物。近年來,云計算的價值進一步為業(yè)界所認可,在走過最初技術引入期的喧囂之后,開始進入爆發(fā)式增長的階段。云計算的解決方案和具體產品層出不窮,應用范圍逐步拓展,并出現(xiàn)了很多成功的商業(yè)應用案例。Google、Amazon、IBM微軟等歐美大公司,已經走在前面,紛紛轉型,研發(fā)和運營不同的云計算產品和服務。 云計算不僅僅是技術革新驅動商業(yè)模式變革的產物,也是用戶需求驅動IT運營變革的結果。從運營商的角度來看,云計算中原來承擔很多任務的用戶端設備將逐漸得到解放,變得更加簡單和便捷。通過統(tǒng)一部署支持IT、通信和信息服務的云平臺及云客戶端設備和系統(tǒng),各類用戶使用傳統(tǒng)通信和IT服務及協(xié)同工作、學習、娛樂的門檻會顯著降低；而對于用戶而言,其使用資源和享受服務的成本將越來越低,且方便性大大增強。用戶通過運營商提供的寬帶接入服務,可以隨時隨地低成本地接入運營商提供的云平臺,享受各種云服務,如大規(guī)模計算、信息處理、應用開發(fā)、數(shù)據存儲和備份以及各細分市場的應用提供和服務支付等。 在網絡和IT基礎設施的分布式環(huán)境下,虛擬化技術作為云計算的基礎支撐性技術為云計算的成功運營提供了技術保障。虛擬化技術實現(xiàn)了資源的邏輯抽象和統(tǒng)一表示,可以對規(guī)�；挠脩舴⻊招枨筮M行精心的匹配,在硬件設施和網絡資源的合理分配、軟件應用的統(tǒng)一部署、海量數(shù)據的集中處理及存儲管理、數(shù)據容錯等方面都有著巨大的優(yōu)勢,大大提升了資源利用率和數(shù)據處理效率,降低了管理難度和失誤率,從而有效地控制了成本。目前,Xen和VMware是虛擬化服務的主流供應商,并分別提供Xen Live migration和VMware Vmotion虛擬機動態(tài)遷移工具,以實現(xiàn)虛擬機的部署和遷移。 虛擬機的動態(tài)遷移是將一臺服務器上的虛擬機實時地遷移至另一臺服務器上。遷移過程中,除了時間極短的暫停階段,虛擬機全程不中斷地為用戶提供服務。因此,虛擬機的動態(tài)遷移成為了云計算中解決負載均衡、服務器維護及工作環(huán)境遷移等問題的有效方法。但是在現(xiàn)階段,虛擬機的遷移調度是手動或半自動化實現(xiàn)的,調度效率不高,影響虛擬機的遷移性能。此外,虛擬機的動態(tài)遷移只進行CPU、內存、網絡設備及I/O等狀態(tài)的遷移,在主機間通過SAN (storage area network)、NAS (net-work-attached storage)等方式共享存儲設備而不進行磁盤數(shù)據的遷移。隨著網絡技術和應用需求的發(fā)展,需要在無法實現(xiàn)共享存儲或廣域網環(huán)境下實現(xiàn)包括磁盤數(shù)據的虛擬機全系統(tǒng)實時遷移。 針對云計算的特點和應用需求,本文在現(xiàn)有虛擬機動態(tài)遷移框架的基礎上,對虛擬機動態(tài)遷移的調度策略及數(shù)據遷移算法進行了優(yōu)化,并在Xen虛擬化架構下實現(xiàn)了包括磁盤數(shù)據在內的虛擬機全系統(tǒng)遷移。該方案的優(yōu)點主要在于：一、可以監(jiān)控云計算資源的實時使用情況,并自動觸發(fā)遷移,完成高效的負載均衡；二、實現(xiàn)了虛擬機磁盤數(shù)據的遷移,將來可以應用于廣域網環(huán)境,增強了云計算的可用性和動態(tài)可擴展性。
[Abstract]:Cloud computing is thought to be the " third IT revolution " that could once again override IT ' s face following the PC , which is a new area of common concern to the Internet , IT and telecommunications industries . This is because cloud computing is a new generation that combines Internet business models , revolutionary IT technologies , and telecommunications services . In recent years , cloud computing is a new generation of business applications . Cloud computing solutions and concrete products are evolving and a number of successful business applications have emerged . Many companies , such as Google , Amazon , IBM , and so on , have taken steps to transform , develop and operate different cloud computing products and services .

Cloud computing is not only the product of technological innovation driving business model change , but also the result of user demand driven IT operation change . From the point of view of the operator , the user - side equipment that originally undertook many tasks in cloud computing will gradually be liberated , become more simple and convenient . By unified deployment of cloud platform and cloud client device and system supporting IT , communication and information service , all kinds of users use traditional communication and IT services and work together , learning and entertainment threshold will be significantly reduced ;
With the broadband access service provided by the operator , the user can access the cloud platform provided by the operator at low cost , anytime and anywhere , and enjoy various cloud services , such as large - scale computing , information processing , application development , data storage and backup , application provision and service payment for each segment market , and the like .

In the distributed environment of network and IT infrastructure , virtualization technology provides the technology guarantee for the successful operation of cloud computing . The virtualization technology realizes the logical abstraction and uniform representation of resources , and has great advantages in the rational distribution of hardware facilities and network resources , unified deployment of software applications , centralized processing of massive data and storage management , data fault tolerance , etc . , thus effectively controlling cost . Currently , Xen and VMware are the mainstream vendors of virtualization services , and provide Xen Live migration and VMware Vmotion virtual machine dynamic migration tools , respectively , to realize the deployment and migration of virtual machines .

The dynamic migration of virtual machines is an effective way to solve the problems of load balance , server maintenance and migration of virtual machines .

Aiming at the characteristics and application requirements of cloud computing , this paper optimizes the scheduling strategy and data migration algorithm of virtual machine dynamic migration based on the existing dynamic migration framework of virtual machines , and realizes the virtual machine system migration including magnetic disk data under the Xen virtualization architecture . The scheme has the advantages that : firstly , the real - time usage of cloud computing resources can be monitored , and the migration is triggered automatically , and efficient load balancing is completed ;
secondly , the migration of the virtual machine disk data is realized , the future can be applied to the wide area network environment , and the usability and the dynamic scalability of the cloud computing are enhanced .

【學位授予單位】：太原理工大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TP302

【參考文獻】

相關期刊論文 前8條

1 張彬彬;羅英偉;汪小林;王振林;孫逸峰;陳昊罡;許卓群;李曉明;;虛擬機全系統(tǒng)在線遷移[J];電子學報;2009年04期

2 姜明;吳春明;張e，

本文編號：1763979