【摘要】：云計算技術(shù)能夠整合網(wǎng)絡(luò)、計算、存儲等各種計算機資源,通過網(wǎng)絡(luò)靈活的為用戶提供各種優(yōu)質(zhì)的計算服務(wù)。虛擬化技術(shù)是云計算的基礎(chǔ),能夠?qū)崿F(xiàn)計算機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)用的運行對內(nèi)存的需求通常是變化的,而傳統(tǒng)的內(nèi)存虛擬化方案無法根據(jù)虛擬機的內(nèi)存使用情況來高效的調(diào)整虛擬機內(nèi)存,這種情況下往往會造成虛擬化平臺內(nèi)存資源的浪費。本文基于KVM虛擬化技術(shù),設(shè)計了一個高效的內(nèi)存管理系統(tǒng)。本系統(tǒng)主要有虛擬機內(nèi)存監(jiān)視模塊,虛擬機內(nèi)存平衡模塊和多宿主機內(nèi)存平衡模塊三個部分組成。首先本文設(shè)計了一種實時和準(zhǔn)確的虛擬機內(nèi)存感知技術(shù),與當(dāng)前其它感知技術(shù)相比本文設(shè)計的該技術(shù)對宿主機和客戶機造成開銷都很小。通過實時獲取的虛擬機內(nèi)存使用情況,本文結(jié)合蟻群算法設(shè)計一種高效的虛擬機內(nèi)存調(diào)整策略,能夠合理分配虛擬機內(nèi)存。并通過結(jié)合使用虛擬機內(nèi)存氣球技術(shù)和虛擬機內(nèi)存熱添加技術(shù),實現(xiàn)兩種技術(shù)的優(yōu)勢互補高效的調(diào)整虛擬機內(nèi)存。與其它內(nèi)存管理技術(shù)只能調(diào)整單個宿主機的下的內(nèi)存使用不同,本系統(tǒng)還可以通過虛擬機在線遷移技術(shù)實現(xiàn)多宿主機間的內(nèi)存平衡。最后對本系統(tǒng)進(jìn)行了相關(guān)實驗分析,結(jié)果表明本內(nèi)存管理系統(tǒng)不僅能夠高效的調(diào)整虛擬機內(nèi)存,還能夠?qū)崿F(xiàn)多宿主機下的內(nèi)存平衡。最后的綜合性能測試表明本系統(tǒng)能夠?qū)崿F(xiàn)宿主機120%左右的內(nèi)存超配使用,極大的提高計算機內(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)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TP302;TP315

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