文档介绍：摘要
摘要
随着互联网事业的爆炸性增长,它在我们的生活中扮演越来越重要的角色, 因特网上的数据流量增长得异常迅速。web服务器的负载增长得十分迅速,以至于很容易就会在一个很短的时间内超过服务器的吞吐能力。
为了解决服务器处理能力不足的问题,有两个不同的方案。其一,是单服务器的方案。升级硬件,使用更高性能的服务器。但是,很快的,随着请求数量的进一步增加,我们又会面临再一次的硬件升级。升级硬件非常繁琐,并且,投入的成本也非常高。其二,是多服务器的方案。例如,基于服务器集群来构造一个扩展灵活的服务器。当负载增加时,我们通过往集群中增加多台工作结点,来应付日益增长的负载。当然,配置多服务器的集群系统也是有许多方法的。
当前许多研究人员已经在这课题上做过很多研究,也提出了一些服务器集群系统的系统模型,然而它们并不见得适用于所有的应用情况,在某些应用中还存在着一定的问题。本文将介绍分析当前集群系统主要产品与研究情况、当前应用集群系统的情况,并在此基础上,结合实际的工程项目应用情况,尝试提出一个基于IP层的web服务集群系统模型。
本文分为五大部分。第一部分介绍web集群系统。第二部分介绍了基7=IP层的集群系统。第三部分分析了一个基-J=iP层的集群系统模型(LVS)。第四部分讨论了无均衡器的集群系统设计思想。第五部分描述了该方案的具体实现和系统不足,展望。
关键词:集群;负载均衡;高可靠性
华南理工大学工学硕士学位论文
Abstract
With the explosive growth of the and its increasinglY important role in our 1ives,the traffic on the iS increasing dramatically,which has been growing at over 100%annual workload on the servers iS increasing rapidly SO that servers will be easilY overloaded for a short time,especially for a popular web server.
To e the overloading problem of the servers,there are two iS the Single server solution, upgrade the server to a higher performance server,but it will soon be overloaded when requestS increases SO that we have to upgrade it again,the upgrading process plex and the cost iS other is the multi-server solution,. to build a scalable server on a cluster of load increases, we can SimplY add a new server or more into cluster to meet the increasing ,there are several methods to construct the cluster of
Servers.
Nowadays many researchers have made many researches in thiS topiC and bring out some Cluster system modalS,but they are not SUitable for a11 paper will analysis some productS and researches of Cluster system at the time being,and then provides an cluster system to server as a web server.
There are five partS in thiS first part introduces web Cluster second part introduces the web cluster system base on IP third part