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研究生： 林鉉竣
Lin, Hsuan-Chun
論文名稱： 設計與模擬使用者到達變異性為基礎的雲端異質性虛擬機器資源提供與指派方法
Design and Modeling of Arrival Variance-based Methods for Resource Provision and Allocation Management with Heterogeneous Types of VMs in Cloud Computing Systems
指導教授： 陳朝鈞
Chen, Chao-Chun
學位類別： 碩士
Master
系所名稱： 電機資訊學院 - 製造資訊與系統研究所
Institute of Manufacturing Information and Systems
論文出版年： 2014
畢業學年度： 102
語文別： 中文
論文頁數： 46
中文關鍵詞： 雲端運算 、資源提供策略 、隨機派翠網 、虛擬機器比例
外文關鍵詞： cloud computing, Resource management strategies, Stochastic Petri Nets, the proportion of the virtual machine
相關次數： 點閱：108  下載：2 
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    • 雲端運算是近年來成長快速且受歡迎的新興服務遞送模式。雲端供應商可以在特定的時間將配有硬體資源(resources)、開發平台(Development Platform)或應用程式服務(Application Service)的虛擬機器(Virtual Machine, VM)指派給使用者。
    提供這些服務的雲端供應商可以用服務類型分成三類：
    (1)提供商業軟體當作服務(Software as a Service; SaaS)
    (2)提供開發平台為服務(Platform as a service; PaaS)
    (3)提供硬體資源當服務(Snfrastructure as a service; IaaS)並以隨支隨付(Pay as you use)的付費方式來計算出租雲端服務的使用費用 [20]。
    目前在各種類型的雲端服務有許多知名廠商積極投入。 SaaS供應商為達成平均總成本支出的目標，需要在不同環境參數下決定資源池規模大小與組成資源池的虛擬機器種類。資源池規模大小與組成資源池機器種類將決定SaaS供應商的租賃成本與違背成本。 SaaS供應商為根據使用者數量，將資源池中不同種類的虛擬機器數量擴張或收縮以期達到有效之資源提供方式。
    本研究主要目的是在隨機的使用者需求下，根據平均使用者抵達人數與需求波動大小將決定資源池(resource pool)內虛擬機器種類間的比例，並達到雲端供應商支付服務運行成本(租賃成本加違約成本)最小化的目標。
    本研究將此問題分成兩個階段(Phase)進行解題：
    在第一階段，本研究根據平均使用者抵達人數與需求波動大小決定資源池初始規模大小。
    在第二階段，延續第一階段的資源池規模大小，根據使用者等候狀態調整建構資源池中虛擬機器的比例。
    本研究針對上述步驟建立隨機派翠網模型(Stochastic Petri Nets, SPN)評估雲端資源提供策略並設計三個實驗佐證我們的想法是正確的
    (1)同預期人數不同抵達變異程度對機台類型比例的影響
    (2)用多種虛擬機器組合資源池比單一虛擬機器有較低的成本
    (3)變異驅動資源指派策略和 optimal multiserver approach比較。

    關鍵字：雲端運算、資源提供策略、隨機派翠網、虛擬機器比例

    In this paper, we discuss how to decide SaaS vendor resources size and type under different user behavior, lead to average total cost minimum.
    We propose ``Arrival Variance-based Methods for Resource Provision and Allocation Management with Heterogeneous Types of VMs' according to the average user arrivals determine the size of the resource pool and virtual machines type ratio within cloud service providers to achieve goal.
    We designed a series of experiments to support our idea is correct and experiments results show our methods is significant.

    目錄 書名頁. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i 論文口試委員審定書 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii 中文摘要. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii 英文摘要. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv 誌謝. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii 目錄. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix 表目錄. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii 圖目錄. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii 一、緒論. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1 研究背景. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 研究動機. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 研究目的. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.4 相關研究進展與限制. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.5 資源提供問題的想法與解決方案框架. . . . . . . . . . . . . . . . . . . 4 1.6 貢獻. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.7 論文架構. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 二、文獻討論. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 三、環境. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.1 雲端運算(Cloud Computing) . . . . . . . . . . . . . . . . . . . . . . . . 8 3.1.1 雲端運算演進. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.1.2 雲端運算定義與特性. . . . . . . . . . . . . . . . . . . . . . . . 9 3.1.3 雲端服務類型與佈署種類. . . . . . . . . . . . . . . . . . . . . 11 3.2 SaaS 雲端服務架構(SaaS Service Framework) . . . . . . . . . . . . . . 12 3.3 SaaS 商業模式(SaaS Business Model) . . . . . . . . . . . . . . . . . . . 12 3.3.1 租賃模型(lease model) . . . . . . . . . . . . . . . . . . . . . . . 12 3.3.2 懲罰模型(penalty model) . . . . . . . . . . . . . . . . . . . . . . 14 3.4 隨機派翠網路. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.4.1 隨機派翠網路元件與定義. . . . . . . . . . . . . . . . . . . . . 14 3.5 半馬可夫決策過程. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 四、問題定義. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.1 隨機動態的線性模型. . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 五、方法提案. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5.1 變異驅動雲端資源提供設計構想. . . . . . . . . . . . . . . . . . . . . . 22 5.2 需求變異驅動雲端資源提供與指派求解流程. . . . . . . . . . . . . . . 23 5.3 需求變異驅動雲端資源提供與指派計算細節. . . . . . . . . . . . . . . 24 六、模擬. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 6.1 模擬的基本概念. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 6.2 選擇模擬工具：Stochastic Petri Net . . . . . . . . . . . . . . . . . . . 26 6.3 模擬雲端特色行為. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 6.4 SPN模型. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 6.4.1 任務抵達行為模擬. . . . . . . . . . . . . . . . . . . . . . . . . 29 6.4.2 使用者SLA違背行為模擬. . . . . . . . . . . . . . . . . . . . . . 29 6.4.3 計算資源指派行為模擬. . . . . . . . . . . . . . . . . . . . . . . 29 6.4.4 使用者服務行為模擬. . . . . . . . . . . . . . . . . . . . . . . . 30 6.4.5 計算資源縮放行為. . . . . . . . . . . . . . . . . . . . . . . . . 31 6.4.6 雲端系統績效成本模型. . . . . . . . . . . . . . . . . . . . . . . 33 6.4.7 模型參數化. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 七、實驗. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 7.1 實驗參數設定. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 7.2 對照組設定. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 7.3 實驗一：同預期人數不同抵達變異程度對機台類型比例的影響. . . . . 36 7.4 實驗二：用多種虛擬機器組合資源池比單一虛擬機器有較低的成本. . 37 7.5 實驗三：變異驅動資源指派策略和optimal multiserver approach比較. 38 八、結論. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 參考文獻. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 表目錄 5.1 環境參數意義與說明. . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 5.2 決策參數意義與說明. . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 6.1 SPN架構轉移元件意義與說明. . . . . . . . . . . . . . . . . . . . . . . 28 6.2 SPN架構元件位置意義與說明. . . . . . . . . . . . . . . . . . . . . . . 29 7.1 環境參數意義與說明. . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 圖目錄 1 Optimum proportion of different types of virtual machines . . . . . . . vi 2 single-type resource pool V.S. Multi-type resource pool . . . . . . . . . vii 3 our methods V.S. optimal multiserver approach . . . . . . . . . . . . . vii 1.1 企業外包給SaaS供應商管理QoS示意圖. . . . . . . . . . . . . . . . . . 2 1.2 成本與品質關係圖. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.3 研究流程圖. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.4 論文組織架構圖. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.1 雲端運算演進圖. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.2 雲端服務種類示意圖. . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.3 雲端SaaS服務架構. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.4 SLA懲罰模型. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.5 SLA範例說明. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.6 半馬可夫決策範例說明. . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.1 時間軸與決策之間關係圖. . . . . . . . . . . . . . . . . . . . . . . . . 18 4.2 系統行為與狀態轉移圖. . . . . . . . . . . . . . . . . . . . . . . . . . . 19 5.1 使用者抵達變異小. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5.2 使用者抵達變異大. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 5.3 需求量變異. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 5.4 變異程度大. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 6.1 雲端提供與指派行為SPN模型. . . . . . . . . . . . . . . . . . . . . . . 30 6.2 使用者抵達雲端服務系統進入佇列等待行為之SPN模型。. . . . . . . 30 6.3 使用者等候太久導致SaaS供應商違背SLA行為之SPN模型。. . . . . . 31 6.4 計算資源指派行為SPN模型. . . . . . . . . . . . . . . . . . . . . . . . 31 6.5 使用者接受雲端服務. . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 6.6 計算資源縮放行為SPN模型. . . . . . . . . . . . . . . . . . . . . . . . 32 7.1 同預期人數不同抵達變異程度對機台類型比例的影響. . . . . . . . . . 37 7.2 用多種虛擬機器組合資源池比單一虛擬機器有較低的成本. . . . . . . 38 7.3 總成本比較圖. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 7.4 租賃成本比較圖. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 7.5 違背成本比較圖. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

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