【摘要】：云計算技術能夠整合網絡、計算、存儲等各種計算機資源,通過網絡靈活的為用戶提供各種優(yōu)質的計算服務。虛擬化技術是云計算的基礎,能夠實現計算機資源的高效管理和使用。內存的虛擬化既是虛擬化技術中實現最復雜的部分,并且也是提高虛擬化效率的關鍵。虛擬化環(huán)境中隨著不同應用的運行對內存的需求通常是變化的,而傳統(tǒng)的內存虛擬化方案無法根據虛擬機的內存使用情況來高效的調整虛擬機內存,這種情況下往往會造成虛擬化平臺內存資源的浪費。本文基于KVM虛擬化技術,設計了一個高效的內存管理系統(tǒng)。本系統(tǒng)主要有虛擬機內存監(jiān)視模塊,虛擬機內存平衡模塊和多宿主機內存平衡模塊三個部分組成。首先本文設計了一種實時和準確的虛擬機內存感知技術,與當前其它感知技術相比本文設計的該技術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存使用情況,本文結合蟻群算法設計一種高效的虛擬機內存調整策略,能夠合理分配虛擬機內存。并通過結合使用虛擬機內存氣球技術和虛擬機內存熱添加技術,實現兩種技術的優(yōu)勢互補高效的調整虛擬機內存。與其它內存管理技術只能調整單個宿主機的下的內存使用不同,本系統(tǒng)還可以通過虛擬機在線遷移技術實現多宿主機間的內存平衡。最后對本系統(tǒng)進行了相關實驗分析,結果表明本內存管理系統(tǒng)不僅能夠高效的調整虛擬機內存,還能夠實現多宿主機下的內存平衡。最后的綜合性能測試表明本系統(tǒng)能夠實現宿主機120%左右的內存超配使用,極大的提高計算機內存資源的利用率。
[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.
【學位授予單位】：杭州電子科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP302;TP315

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