User Guide

Overview
Novell Cluster Services Overview and Installation
103-000154-001
August 29, 2001
Novell Confidential
Manual 99a38 July 17, 2001
Figure 1 Three-Server Cluster
During normal cluster operation, each server is in constant communication
with the other servers in the cluster and performs periodic polling of all
registered resources to detect failure.
Suppose Web Server 1 experiences hardware or software problems and the
users depending on Web Server 1 for Internet access, e-mail, and information
lose their connections. The following figure shows how resources are moved
when Web Server 1 fails.
Figure 2 Three-Server Cluster after One Server Fails
Web Server
3
Web Site C
Web Site D
Web Server 2
Fiber Channel Switch
Shared Disk
System
Web Site E
Web Site F
Web Site A
Web Site B
Web Server 1
Web Server 1
Web Server 3
Web Site A
Web Site C
Web Site D
Web Server 2
Fiber Channel Switch
Shared Disk
System
Web Site B
Web Site E
Web Site F