【摘要】：云計(jì)算技術(shù)能夠整合網(wǎng)絡(luò)、計(jì)算、存儲(chǔ)等各種計(jì)算機(jī)資源,通過(guò)網(wǎng)絡(luò)靈活的為用戶(hù)提供各種優(yōu)質(zhì)的計(jì)算服務(wù)。虛擬化技術(shù)是云計(jì)算的基礎(chǔ),能夠?qū)崿F(xiàn)計(jì)算機(jī)資源的高效管理和使用。內(nèi)存的虛擬化既是虛擬化技術(shù)中實(shí)現(xiàn)最復(fù)雜的部分,并且也是提高虛擬化效率的關(guān)鍵。虛擬化環(huán)境中隨著不同應(yīng)用的運(yùn)行對(duì)內(nèi)存的需求通常是變化的,而傳統(tǒng)的內(nèi)存虛擬化方案無(wú)法根據(jù)虛擬機(jī)的內(nèi)存使用情況來(lái)高效的調(diào)整虛擬機(jī)內(nèi)存,這種情況下往往會(huì)造成虛擬化平臺(tái)內(nèi)存資源的浪費(fèi)。本文基于KVM虛擬化技術(shù),設(shè)計(jì)了一個(gè)高效的內(nèi)存管理系統(tǒng)。本系統(tǒng)主要有虛擬機(jī)內(nèi)存監(jiān)視模塊,虛擬機(jī)內(nèi)存平衡模塊和多宿主機(jī)內(nèi)存平衡模塊三個(gè)部分組成。首先本文設(shè)計(jì)了一種實(shí)時(shí)和準(zhǔn)確的虛擬機(jī)內(nèi)存感知技術(shù),與當(dāng)前其它感知技術(shù)相比本文設(shè)計(jì)的該技術(shù)對(duì)宿主機(jī)和客戶(hù)機(jī)造成開(kāi)銷(xiāo)都很小。通過(guò)實(shí)時(shí)獲取的虛擬機(jī)內(nèi)存使用情況,本文結(jié)合蟻群算法設(shè)計(jì)一種高效的虛擬機(jī)內(nèi)存調(diào)整策略,能夠合理分配虛擬機(jī)內(nèi)存。并通過(guò)結(jié)合使用虛擬機(jī)內(nèi)存氣球技術(shù)和虛擬機(jī)內(nèi)存熱添加技術(shù),實(shí)現(xiàn)兩種技術(shù)的優(yōu)勢(shì)互補(bǔ)高效的調(diào)整虛擬機(jī)內(nèi)存。與其它內(nèi)存管理技術(shù)只能調(diào)整單個(gè)宿主機(jī)的下的內(nèi)存使用不同,本系統(tǒng)還可以通過(guò)虛擬機(jī)在線遷移技術(shù)實(shí)現(xiàn)多宿主機(jī)間的內(nèi)存平衡。最后對(duì)本系統(tǒng)進(jìn)行了相關(guān)實(shí)驗(yàn)分析,結(jié)果表明本內(nèi)存管理系統(tǒng)不僅能夠高效的調(diào)整虛擬機(jī)內(nèi)存,還能夠?qū)崿F(xiàn)多宿主機(jī)下的內(nèi)存平衡。最后的綜合性能測(cè)試表明本系統(tǒng)能夠?qū)崿F(xiàn)宿主機(jī)120%左右的內(nèi)存超配使用,極大的提高計(jì)算機(jī)內(nèi)存資源的利用率。
[Abstract]:Cloud computing technology can integrate network, computing, storage and other computer resources, through the network flexible to provide users with a variety of high-quality computing services. Virtualization technology is the foundation of cloud computing, which can realize the efficient management and use of computer resources. Memory virtualization is not only the most complex part of virtualization technology, but also the key to improve the efficiency of virtualization. In the virtualization environment, the memory requirement changes with the running of different applications, but the traditional memory virtualization scheme can not adjust the virtual machine memory efficiently according to the memory usage of the virtual machine. This kind of circumstance often can cause the waste of memory resource of virtualization platform. This paper designs an efficient memory management system based on KVM virtualization technology. The system consists of three parts: virtual machine memory monitor module, virtual machine memory balance module and multi-host memory balance module. Firstly, this paper designs a real-time and accurate memory awareness technology, which is less expensive for host and client than other technologies. Based on the real-time memory usage of virtual machine, this paper designs an efficient strategy of virtual machine memory adjustment combined with ant colony algorithm, which can allocate virtual machine memory reasonably. By combining virtual machine memory balloon technology and virtual machine memory hot addition technology, the two technologies can adjust virtual machine memory efficiently and mutually. Different from other memory management techniques which can only adjust the memory usage under a single host the system can also achieve memory balance between multiple hosts through virtual machine online migration technology. Finally, the experimental results show that the memory management system can not only adjust virtual machine memory efficiently, but also achieve memory balance under multiple hosts. Finally, the comprehensive performance test shows that the system can achieve about 120% of the host computer memory overmatch, greatly improve the utilization of computer memory resources.
【學(xué)位授予單位】：杭州電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TP302;TP315

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