中小企业web服务器的高可用集群方案设计
关键词： Web服务器集群；负载均衡；高可用性；集群系统
SME web server high availability cluster solution design
Abstract:Along with the increase of users and browsing tasks in Internet and Intranet，the single Web cluster is likely to be the new bottleneck ofnetwork visiting for its limited capability．The web server cluster hasthe features of high availability，and load balancing，and scalability．So it becomes the best solution for the preceding problem．
This paper doessome research about the design and real ization of Small and Medium Enterprises web server clusters．First the paper analyses the technique of the existing web server Cluster system，,introduces some typical web cluster systems，and discusses the work’s theory and realization’s technique of highavailability and load balancing emphatically．request. Each node in a Web Cluster has its own software and hardware resources, working cooperatively with the switcher to provide a single system image to the outside. All coming requests are forwarded to server nodes by the switcher with the goal of load balancing among all nodes so that high overall throughput and low average response latency can be reached.This paper proposes a software method of establishing a web HA server Cluster system in Local AreaNetwork．
KEYWORDS：Web server Cluster;Load Balancing;High Availahility;Web Cluster System
目录
1 绪论 1
2 选题分析 4
2.1 课题背景 4
2.2 选课的意义 4
2.3 论文的研究内容 5
3 高可用集群领域内概念 6
3.1 Linux高可用集群概述 6
3.1.1 集群 6
3.1.2 高可用集群的定义 8
3.1.3 DRBD介绍 8
3.2 高可用集群(HA)的层次结构 9
3.3 系统的可行性分析和工作模式 10
3.4 需求分析 11
3.4.1 系统开发和运行环境 12