闪拍系统并发控制实时系统硕士论文 (2).doc

闪拍系统的设计与实现软件工程， 2010， 硕士【摘要】 闪拍系统是一种近年来新兴的在线拍卖系统。在最近几年中,使用这种商业模式的网站的网络流量增长的非常迅速。这类商业系统的本质是一种高度并发的实时系统。当今越来越多的实时系统被应用在生活的方方面面。因此,对于闪拍系统的研究于实现具有十分重要的理论与实际意义。本论文的目的是设计并实现一个闪拍系统。在这个系统中将采用三种不同的并发控制策略来实现对用户请求的并发控制。同时,通过许多测试来比较在高并发的实时系统中不同并发控制策略的性能。这个结果可以为选择实时系统的并发控制策略提供一定的依据。在项目的开始阶段,通过对闪拍系统及各种并发机制的研究与学习,了解了该类系统的业务流程与商业模型,同时掌握了各种并发机制的特点及实现方式。在此之后,该系统的设计与实现完全按照软件工程的生命周期来进行。整个过程包括需求分析,系统设计,系统实现,以及系统测试等几个阶段。在需求分析阶段,以用例描述为出发点,进行了功能需求分析及性能需求分析。在设计阶段,首先通过对业务流程及算法的分析,设计了系统的基本流程和算法流程。在此基础上进行了类和数据库的设计。在实现阶段,按照设计对各模块逐一进行了实现。同时,使用JMeter对虚拟用.更多还原【Abstract】 Pay-to-Bid auction system is a new kind of online auction system. In recent years, the network traffic of the websites using this business model is increasing very fast. The essence of this business system is a kind of real-time system with high conflict. Today, more and more real-time systems are applied in everyday life. So the research and implementation of Pay-to-Bid auction system has important theoretical and practical meanings.The target of this dissertation is to design and implement a P.更多还原 【关键词】 闪拍系统； 并发控制； 实时系统； 【Key words】 Pay-to-Bid auction system； concurrency control； real-time system； 摘要 4-5 Abstract 5 Chapter 1 Introduction 10-24 1.1 Project background 10-12 1.2 Research Problem 12 1.3 Intellectual Challenge 12-13 1.4 Research Objectives 13-14 1.5 Pay-to-Bid Auction 14-21 1.5.1 What is Pay-to-Bid Auction? 14-16 1.5.2 Other Online Auction Type 16-17 1.5.3 Network Traffic Analysis 17-21 1.6 Research Methodology 21-23 1.7 Main content of the thesis report 23-24 Chapter 2 Requirements Analysis 24-29 2.1 Use Case Description 24-25 2.2 Functional Requirements 25 2.3 Performance Requirements 25-27 2.4 Risk Analysis 27-28 2.5 Summary 28-29 Chapter 3 System Design 29-43 3.1 Business Process Design 29-31 3.2 Concurrency Control Process Design 31-39 3.2.1 HP2PL Process 31-35 3.2.2 OCC-BC Process 35-38 3.2.3 BTS Process 38-39 3.3 Database Design 39-41 3.4 Class Design 41 3.5 Interface Design 41-42 3.6 Summary 42-43 Chapter 4 System implementation 43-60 4.1 Server Structure 43-47 4.2 Implementation of Core Algorithms 47-55 4.2.1 HP2PL Algorithm 48-51 4.2.2 OCC-BC Algorithm 51-53 4.2.3 BTS Algorithm 53-55 4.3 Implementation of Virtual Client 55-58 4.3.1 Load Auction Page Requests 55-56 4.3.2 Auction Info Refresh Requests 56-57 4.3.3 Bid Requests 57-58 4.4 Experimentation Preparation 58-59 4.5 Summary 59-60 Chapter 5 Testing and Evaluation 60-76 5.1 Introduction 60 5.2 Testing Plan 60-62 5.2.1 Hardware Environment 60 5.2.2 System Test Design 60-61 5.2.3 Test Cases Design 61-62 5.3 Test Result of the System Tests 62-63 5.4 Evaluation of Test Results 63-75 5.4.1 Performance of HP2PL Method 63-66 5.4.2 Performance of OCC-BC Method 66-68 5.4.3 Performance of BTS method 68-71 5.4.4 Evaluate with Friedman T