本文選題：云計算　切入點：虛擬集群遷移　出處：《吉林大學》2014年碩士論文　論文類型：學位論文

【摘要】：近30年來，隨著系統(tǒng)虛擬化和網(wǎng)絡虛擬化技術不斷地發(fā)展，虛擬化技術所呈現(xiàn)的隔離性和安全性以及可定制的特征，越來越得到人們的信賴，其本身存在的問題也得到了很好地解決，預拷貝，數(shù)據(jù)包緩存等技術，降低了虛擬機遷移的成本，推動了虛擬機遷移技術的廣泛應用。例如，應用虛擬化技術的集群/云計算環(huán)境具有資源利用率高，方便管理維護，可靠性高等特點，可靈活地部署和管理高性能計算環(huán)境——虛擬集群。 虛擬化技術為系統(tǒng)資源管理提供了靈活的手段，其中虛擬機遷移技術在負載平衡，系統(tǒng)容錯，在線維護，能耗管理等資源管理調(diào)度領域發(fā)揮著重大作用。但在現(xiàn)實環(huán)境中，想要真正地利用好虛擬機遷移技術進行資源的動態(tài)管理，必須了解工作負載本身的特點，才能獲得收益。例如，web服務的高并發(fā)性能及網(wǎng)絡傳輸性能需求較高，而在虛擬集群中運行的并行作業(yè)，初始時當所有子任務就緒時才能開始進行，計算過程中，子任務間同步性能需求很高，關聯(lián)性強，且有的作業(yè)子任務間數(shù)據(jù)交互密集，而且當所有子任務完全結(jié)束時，并行作業(yè)才算完成，甚至一起釋放資源。這些特點均需要管理員慮及，，才能在保證用戶性能需求的前提下，合理提高系統(tǒng)利用效率�，F(xiàn)階段的研究工作大多單純地以資源利用率為目標進行虛擬機部署遷移，在用于部署虛擬集群的集群／云計算環(huán)境中時，很容易造成資源碎片，難以直接應用到虛擬集群環(huán)境中。 綜上，本文從運行并行作業(yè)的虛擬集群出發(fā)，對虛擬機遷移策略進行重新思考，在以減少資源碎片為目的的虛擬化資源整合的應用場景中，制定了相應的虛擬機遷移策略。關注了集群／云計算環(huán)境本身的特點，及并行作業(yè)子任務間交互性強等特點。首先對算法實施的環(huán)境進行系統(tǒng)模型構(gòu)造，進行了合理的假設說明。然后利用“區(qū)域劃分法”對異構(gòu)環(huán)境下的碎片最小化問題的規(guī)模進行縮減，顯著降低了問題的維度和難度，提高了算法的可實施性。最后提出了在同構(gòu)子域這個子環(huán)境中，以虛擬集群為軸心的虛擬機遷移策略。在試驗階段，對系統(tǒng)資源現(xiàn)狀的原因進行簡要分析，采用同種負載，多種資源分配方式的模擬方法模擬現(xiàn)實中的資源分配使用現(xiàn)狀。通過參數(shù)調(diào)節(jié)，可以很好地模擬真實數(shù)據(jù)。理論上以虛擬集群為軸心的虛擬機遷移策略，虛擬集群也“緊湊”，系統(tǒng)資源的分配釋放越整齊有序，結(jié)果有利于虛擬化資源整合。
[Abstract]:In the past 30 years, with the continuous development of system virtualization and network virtualization technology, the isolation, security and customizable characteristics of virtualization technology have gained more and more people's trust. The existing problems have been well solved, such as precopy, packet cache and so on, which reduce the cost of virtual machine migration and promote the wide application of virtual machine migration technology. For example, The cluster / cloud computing environment with virtualization technology has the advantages of high resource utilization, convenient management and maintenance, high reliability and so on. It can flexibly deploy and manage the high performance computing environment-virtual cluster. Virtualization technology provides flexible means for system resource management, in which virtual machine migration technology plays an important role in the field of resource management scheduling, such as load balancing, system fault tolerance, online maintenance, energy consumption management, etc. In order to make good use of virtual machine migration technology for dynamic resource management, we must understand the characteristics of the workload itself in order to gain benefits. For example, the high concurrent performance of web services and the high demand for network transport performance, The parallel jobs running in the virtual cluster can only start when all the sub-tasks are ready. In the computing process, the performance of synchronization among the sub-tasks is very high, the correlation is strong, and the data interaction between the sub-tasks of some jobs is dense. And when all the subtasks are complete, the parallel jobs are done, and even the resources are released together. These characteristics require the administrator to take into account the performance requirements of the user. At present, most of the research work only aims at resource utilization to deploy and migrate virtual machines. In the cluster / cloud computing environment which is used to deploy virtual clusters, it is easy to cause resource fragmentation. It is difficult to directly apply to virtual cluster environment. In summary, this paper reconsiders the strategy of virtual machine migration from the virtual cluster running parallel jobs, in the application scenario of virtual resource integration, which aims to reduce resource fragmentation. The migration strategy of virtual machine is formulated. The characteristics of cluster / cloud computing environment and the interactivity among parallel task subtasks are concerned. Firstly, the system model of the algorithm implementation environment is constructed. The reasonable hypothesis is given, and then the scale of the debris minimization problem in heterogeneous environment is reduced by using the "region partition method", which reduces the dimension and difficulty of the problem. Finally, a virtual machine migration strategy with virtual cluster as its axis in the isomorphic sub-domain is proposed. In the experiment stage, the reasons of the current system resources are analyzed briefly, and the same load is adopted. The simulation method of multiple resource allocation methods simulates the current situation of resource allocation in reality. By adjusting parameters, real data can be well simulated. In theory, virtual machine migration strategy with virtual cluster as its axis can be used. Virtual cluster is also "compact", the more neat and orderly the distribution of system resources, the more conducive to the integration of virtualized resources.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP393.01

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