Novell D7171A - NetServer - LPr, Руководство по установке

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Chapter 1: Overview
3
Overview and Installation
100-004511-001 A
August 31, 1999
Novell Confidential
chapter.enu Temp. Rev 2.02 26 Feb 99
two Web sites. All the data, graphics, and e-mail messages for each Web site is
stored on a shared disk subsystem connected to each of the servers in the
cluster. The following figure depicts how this setup might look.
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.
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