基於混合型儲存設備下針對虛擬化多媒體應用之軟體技術

隨著科技的進步，基於混合型儲存設備下的虛擬化多媒體環境逐漸被重視，利用完善的隔離機制，提供大量的服務，並儲存分享大量的多媒體資料，在這樣的環境，儲存系統直接面臨效能挑戰，然而多層系統的限制，亦引起效能上的議題，這樣多層的系統，是沒有辦法直接面對來自最底層系統的效量瓶頸的，更何況虛擬化的複雜度是非常高，雖然相闋的最佳化技術能夠提供好的效能;針對這樣的環境發展軟體卻是異常困難，因此在本論文，我們提出三個方法以提升虛擬化多媒體環境的便利性，首先為了在程式設計初就能夠分析和估，我們採用模擬的技術，設計一有簡單的程式框架的模擬器，來模擬虛擬化技術的議題，此模擬器稱為Data Center Simulator (DCSim)，從實驗中，我們發現DCSim能夠有類似於虛擬化環境的現像，並且在評估儲存設備效能上僅有3%誤差。並基於此模擬器，我們提出一個使用混合式儲存設備的方法，這個方法稱為Hybrid Storage Placement Mechanism (HSPM)，利用多重門檻決策檔案配置，在結果上能夠提升效能達37%。在此同時，我們亦能夠了解虛擬化技術的挑戰，從而設計一新型的Middleware，我們稱為Ubiquitous portable middleware (Uware)，以面對更多樣的平台，其利用虛擬化技術的概念進行設計，從結果看來，我們能夠利用此middleware，在各式各樣的平台上提供良好的一個設計環境。如上所述，我們提出的三個方法，從評估、最佳化方法設計以及提出新型軟體設計的概念，我們針對虛擬化多媒體環境提出了全面性探討的規劃應用軟體技術。

關鍵字

虛擬化技術；混合式儲存設備；中介軟體

並列摘要

The advent of virtualization has renewed interest in the idea of virtualizing services into the software structure used to construct multimedia application. This approach, known as server consolation offers an alternative, and hopefully better, way to coordinate concurrent services. The virtualization properties of transactions provide a foundation to ensure that concurrent services of shared data do not produce inconsistent or incorrect results. In the meantime, system complexity and storage performance effect the overall performance. Various optimization technology in virtualization and middleware fields are proposed to resolve challenges. Specifically, various on demand services for storage optimization and system management is already in place. Using rich heterogeneous storages and consolidation service is highly valued for efficiency and quality of service. These technologies include system bypass, hardware feature design, and on-demand services. However, the missing link is that the performance bottleneck comes form low level event. In this thesis, we present three techniques to minimize overhead and to improve system adaptivity. Instead of original way to profile system, this thesis first presents a novel virtualization tool. This tool that simulates virtualization is called data center simulator (DCSim). In the meantime, a transparent strategy can be devised to form enhanced system because the layered influence is showed by DCSim. This strategy called a Hybrid Storage Placement Mechanism (HSPM) is designed by using features of towering reading with a hybrid storage system employing SSD and HDD. HSPM can improve performance and reduce the migration overhead via the preference table based on the features of SSD and HDD. In addition, we find out how to prevent overhead without complex system bypassing. Finally, this thesis proposes a ubiquitous portable middleware called Uware. Instead of bypassing VM, Uware can be applied to develop middleware rapidly by taking advantage of shifting vm concept to middleware. Consequently, we present three techniques for virtualization. The first is a virtualization tool. Second, we design a file placement strategy which combines with idle-time analysis. Third, a technique is created for rapid middleware development. The result shows that our proposed software are efficient to use in cloud computing by DCSim and Uware.

並列關鍵字

Virtualization ； Hybrid storage ； Middleware

參考文獻

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基於混合型儲存設備下針對虛擬化多媒體應用之軟體技術

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