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研究生： 胡哲豪
Jhe-Hao Hu
論文名稱： 針對多種嵌入式資料庫系統所設計的中介層
A Middleware Design for Multiple Embedded Database Systems
指導教授： 吳晉賢
Chin-Hsien Wu
口試委員: 林淵翔
Yuan-Hsiang Lin
許孟超
Mon-Chau Shie
陳雅淑
Ya-Shu Chen
學位類別： 碩士
Master
系所名稱： 電資學院 - 電子工程系
Department of Electronic and Computer Engineering
論文出版年： 2010
畢業學年度： 98
語文別： 英文
論文頁數： 49
中文關鍵詞： 嵌入式系統 、資料庫系統 、中介層設計
外文關鍵詞： Embedded system, Database system, Middleware design
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    • 隨著嵌入式系統(Embedded System)以及消費型電子裝置的流行以及快速的發展，它們需要有更大的記憶體容量的儲存裝置支援，像是快閃記憶體(Nand-Flash Memory)以及固態式硬碟(Solid-State Drivers)。所以現在許多的嵌入式系統資料庫(Embedded Database Systems)也開發出專門為了這些儲存裝置所設計的資料庫。然而由於市面上多樣的嵌入式資料庫系統沒有一定標準規範的使用程序，所以造成程式開發者的麻煩以及需要花許多時間來將程式從新的嵌入式資料庫系統轉換到新的嵌入式資料庫系統。在此本文，我們根據這些嵌入式資料庫系統不同的使用程序然後設計了一個專門為了結合多種嵌入式資料庫系統的中介層(Middleware)。中介層將會使程式開發者所撰寫的應用程式更簡單且方便的支援多種的嵌入式資料庫系統。我們也會提供一個機制(Smart Mechanism)讓開發者可以利用中介層去尋找到更適合現在的開發環境的嵌入式資料庫系統。中介層可以評估各個嵌入式資料庫系統效率以及系統消耗的不同。

    Since embedded systems and consumer electronic devices are popular
    now, they have adopted huge-capacity storage systems such as
    flash-memory cards or solid-state drives (SSDs). Many embedded
    database systems(EDBS) also emerge for the maintenance of data on these
    storage systems. However, it is complicated and time-consuming to
    modify an application with one embedded database system to a new one
    with another embedded database system. In the thesis, we will design
    a middleware for multiple embedded database systems by considering
    their different interfaces and overhead. With the help of the
    middleware, it is convenient for users to write applications that
    can easily adopt various embedded database systems.
    The middleware will propose the smart mechanism to support programmer
    that the programmer can choose a great performance EDBS by the middleware.
    Furthermore, the
    middleware can leverage various embedded database systems for better
    performance and reasonable cost.

    1 Introduction 5 2 Related Work and Motivation 7 3 A Middleware Design 10 3.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.2 Design Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.2.1 Standard API . . . . . . . . . . . . . . . . . . . . . . . 11 3.2.2 Data format . . . . . . . . . . . . . . . . . . . . . . . . 12 3.2.3 Conversion Overhead . . . . . . . . . . . . . . . . . . . 12 3.2.4 Benchmark . . . . . . . . . . . . . . . . . . . . . . . . 13 4 Smart Mechanism 14 4.1 Environment Restriction . . . . . . . . . . . . . . . . . . . . . 15 4.2 The Procedure of Smart Mechanism . . . . . . . . . . . . . . . 15 4.2.1 Active . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.2.2 Passive . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5 A Middleware Implementation 18 5.1 SQLite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.1.1 SQLite Structure . . . . . . . . . . . . . . . . . . . . . 19 5.1.2 SQLite API . . . . . . . . . . . . . . . . . . . . . . . . 19 5.2 InterBase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.2.1 InterBase Structure . . . . . . . . . . . . . . . . . . . . 21 5.2.2 InterBase API . . . . . . . . . . . . . . . . . . . . . . . 21 5.3 Berkeley DB . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5.3.1 Berkeley DB Structure . . . . . . . . . . . . . . . . . . 23 5.3.2 Berkeley DB API . . . . . . . . . . . . . . . . . . . . . 23 5.4 Overhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 5.5 Standard API Design . . . . . . . . . . . . . . . . . . . . . . . 27 6 Experiment 30 7 Conclusion 38

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