本文關(guān)鍵詞：基于虛擬計(jì)算環(huán)境的內(nèi)存資源彈性分配研究　出處：《國(guó)防科學(xué)技術(shù)大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 虛擬計(jì)算環(huán)境 虛擬化技術(shù) 內(nèi)存資源 內(nèi)存空洞 換頁(yè)優(yōu)化

【摘要】：社會(huì)生活的各個(gè)領(lǐng)域?qū)ヂ?lián)網(wǎng)提出的新的迫切需求和大量新型網(wǎng)絡(luò)應(yīng)用的出現(xiàn),給網(wǎng)絡(luò)中的海量資源的有效管理帶來(lái)了新的挑戰(zhàn)。特別是互聯(lián)網(wǎng)中的資源具有成長(zhǎng)性、自治性和多樣性特點(diǎn),使得它們?cè)趨f(xié)同共享和綜合利用的過(guò)程中出現(xiàn)了諸多新的問(wèn)題。其中,廣域分布和異構(gòu)的內(nèi)存資源共享和分配這一實(shí)際問(wèn)題,成為其中重要的子問(wèn)題。作為三大計(jì)算資源之一,內(nèi)存資源相對(duì)于CPU和I/O資源更難被共享和復(fù)用,因此對(duì)內(nèi)存資源彈性分配和共享的研究工作具有重要的學(xué)術(shù)意義和商業(yè)價(jià)值,尤其是在新的互聯(lián)網(wǎng)應(yīng)用下,內(nèi)存使用場(chǎng)景將變得更加不可預(yù)知。圍繞這一問(wèn)題,本文主要對(duì)以下四項(xiàng)內(nèi)容進(jìn)行了深入的研究:一、深入分析虛擬化平臺(tái)和XEN體系結(jié)構(gòu),以及半虛擬化驅(qū)動(dòng),內(nèi)存虛擬化模型等技術(shù),它們是實(shí)現(xiàn)虛擬化環(huán)境中內(nèi)存整合的關(guān)鍵支撐技術(shù);接著,本文又重點(diǎn)研究了內(nèi)存氣球方法、內(nèi)存熱插拔技術(shù)、頁(yè)共享技術(shù)和在線遷移技術(shù)等,在分析了它們的優(yōu)點(diǎn)的同時(shí),也指出了各自的不足之處;二、針對(duì)使用氣球方法的虛擬機(jī)在內(nèi)存變化幅度較大時(shí)可能會(huì)出現(xiàn)性能退化的情形,我們提出了內(nèi)存空洞方法,以達(dá)到解決該問(wèn)題的目的。內(nèi)存空洞在虛擬機(jī)監(jiān)視器中分配不具有物理內(nèi)存的“空洞區(qū)域”,當(dāng)虛擬機(jī)對(duì)該內(nèi)存進(jìn)行訪存操作時(shí),才分配真實(shí)的物理內(nèi)存。實(shí)驗(yàn)證明內(nèi)存空洞方法確實(shí)能夠在內(nèi)存激增的情況下,合理分配內(nèi)存,保證虛擬機(jī)服務(wù)質(zhì)量;三、對(duì)客戶虛擬機(jī)換頁(yè)問(wèn)題的深入探索后,我們提出了基于宿主機(jī)的換頁(yè)緩存池方法,來(lái)對(duì)客戶機(jī)的換頁(yè)操作進(jìn)行優(yōu)化。該方法利用了宿主機(jī)中的部分內(nèi)存來(lái)合理緩存由客戶機(jī)中換出的部分內(nèi)存頁(yè)面,并依照每臺(tái)虛擬機(jī)內(nèi)存資源使用情況合理地分配緩存池大小。緩存池方法利用宿主機(jī)中的資源為客戶機(jī)提供換頁(yè)服務(wù),既平衡了宿主機(jī)和客戶機(jī)內(nèi)存使用量,又提高了整體的內(nèi)存利用效率;四、進(jìn)一步地,我們提出了基于網(wǎng)絡(luò)內(nèi)存的客戶機(jī)換頁(yè)方法,以克服單個(gè)物理節(jié)點(diǎn)內(nèi)存使用的上限。該方法利用其他物理節(jié)點(diǎn)上的內(nèi)存資源,有效組織成為一個(gè)換頁(yè)硬盤,用于存儲(chǔ)客戶機(jī)換出的內(nèi)存頁(yè)面。在使用了先進(jìn)的網(wǎng)絡(luò)設(shè)備(如Infiniband或者10Gb以太網(wǎng))后,經(jīng)過(guò)測(cè)試,對(duì)于傳統(tǒng)換頁(yè)方法,基于網(wǎng)絡(luò)內(nèi)存方法在換頁(yè)性能上有一定的優(yōu)勢(shì)。本文是對(duì)虛擬計(jì)算環(huán)境中虛擬化平臺(tái)內(nèi)存資源彈性分配的一次有益探索,研究成果對(duì)于搭建靈活易擴(kuò)展并擁有海量數(shù)據(jù)處理能力的云計(jì)算平臺(tái)具有良好的理論價(jià)值和實(shí)踐意義。本文所做的工作已在承研的國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)、國(guó)家高技術(shù)研究發(fā)展計(jì)劃(863計(jì)劃)和自然科學(xué)基金中得到了應(yīng)用。
[Abstract]:Various fields of social life put forward a new urgent need for the Internet and the emergence of a large number of new network applications. It brings new challenges to the effective management of the massive resources in the network. Especially, the resources in the Internet have the characteristics of growth, autonomy and diversity. In the process of collaborative sharing and comprehensive utilization, there are many new problems, including wide area distribution and heterogeneous memory resource sharing and allocation. As one of the three computing resources, memory resources are more difficult to share and reuse than CPU and I / O resources. Therefore, the research on the flexible allocation and sharing of memory resources has important academic significance and commercial value, especially in the new Internet applications, memory usage scenarios will become more unpredictable. This paper mainly studies the following four contents: first, in-depth analysis of virtualization platform and XEN architecture, as well as paravirtualization driver, memory virtualization model and other technologies. They are the key supporting technologies to realize memory integration in virtualized environment. Then, this paper focuses on the memory balloon method, memory hot-plug technology, page sharing technology and online migration technology, while analyzing their advantages, but also pointed out their shortcomings; Secondly, we propose a memory void method to solve the problem that the performance of virtual machine with balloon method may deteriorate when the memory change is large. To solve this problem, memory holes allocate "empty areas" that do not have physical memory in the virtual machine monitor, when the virtual machine accesses the memory. The experiment proves that the memory empty method can allocate memory reasonably and guarantee the quality of service of virtual machine in the case of large increase of memory. Thirdly, after deeply exploring the problem of customer virtual machine page changing, we propose a new method of page changing cache pool based on host computer. This method utilizes part of memory in the host to reasonably cache some memory pages swapped out of the client. According to the memory resource usage of each virtual machine, the buffer pool can reasonably allocate the buffer pool size. The cache pool method uses the resources in the host computer to provide page changing service for the client, which balances the memory usage between the host computer and the client. It also improves the efficiency of memory utilization. Fourth, we propose a network memory-based client paging method to overcome the upper limit of memory usage of a single physical node, which utilizes memory resources on other physical nodes. Effectively organized as a paging disk for storing memory pages swapped out by the client. Tested after using advanced network devices such as Infiniband or 10GB Ethernet. For the traditional paging method, the network-based memory method has some advantages in the performance of page wrapping. This paper is a useful exploration for the flexible allocation of memory resources in virtual computing environment. The research results have good theoretical value and practical significance for building a cloud computing platform that is flexible and scalable and has huge data processing capability. The work done in this paper has been studied in the national key basic research and development plan (. 973). The National High-tech Research and Development Program (NRDP) and the Natural Science Foundation have been applied.
【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】：2013
【分類號(hào)】：TP333.1
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本文編號(hào)：1372830