High Availability Architecture of Storage Area Network

隨著雲端運算的發展，在備份資料的方式又多了一種選擇。其中雲端儲存服務雖然對使用者來說非常便利及節省資源空間，但對於重要資料或是商業機密，若要儲存在無法控制的設備，對企業來說是否有足夠的保障呢？因此將重要資料或商業機密儲存在企業本身能夠管理及監控的儲存伺服器，對企業來說還是比較可接受的作法。因此對於許多企業來說，儲存主機的備援及資料的一致性就顯得格外重要。 本篇論文將研究儲存區域網路主機在災難復原中所做的高可用性的容錯備援機制。我們利用虛擬化技術架設兩部虛擬主機及安裝相關套件來模擬實作此儲存區域網路環境及進行災難復原演練，來驗證系統架構的高可用性。With the development of the cloud computing technique, there is now one more choice for baking up data. Although the cloud storage service offers much to the users in terms of convenience and resource space saving, is it secure enough for the business enterprises if important data or business confidential information are stored in such an uncontrollable facility? Given this problem, business enterprises are more receptive to the method of storing important data or confidential information in a storage sever which is under their management and supervision. Hence, for many business enterprises, the standby mechanism of the storage host and the consistency of data are particularly important. This thesis studies the high-availability fault-tolerance standby mechanism of the LAN host during the disaster recovery process, and employs two VMs by virtualization technology and install relation softwares to simulate the storage area network (SAN) operations and to implement the disaster recovery drills, thereby verifying the high availability of the system architecture.摘要.................................................................i Abstract............................................................ii 目次...............................................................iii 表目次...............................................................v 圖目次..............................................................vi 第一章 緒論.......................................................1 1.1 研究背景與動機................................................1 1.2 研究目的......................................................2 1.3 論文研究方法..................................................3 1.4 論文架構......................................................3 第二章 背景知識探討...............................................4 2.1 儲存系統架構..................................................4 2.2 iSCSI.........................................................7 2.3 高可用性技術..................................................9 2.4 虛擬化技術...................................................11 2.5 與實機架構及其他虛擬架構比較.................................15 第三章 系統架構..................................................17 3.1 實驗系統環境.................................................17 3.2 系統架構.....................................................18 3.3 分散式區塊同步裝置技術.......................................20 3.4 心跳偵測機制.................................................21 3.5 實作高可用性Fault定義.......................................22 第四章 高可用性系統實作..........................................23 4.1 高可用性環境安裝架設.........................................23 4.2 建構伺服器主機...............................................26 4.3 狀況描述與測試...............................................33 4.3.1 狀況描述一.................................................33 4.3.2 狀況描述二.................................................35 4.3.3 狀況描述三.................................................37 4.3.4 狀況描述四.................................................40 4.4 實作結果.....................................................42 第五章 結論......................................................43 參考資料............................................................4