3.1.2 Matrix Server Administration Guide

Chapter 1: Introduction 10

are associated with the four servers in the matrix. Each server is primary

for one of the virtual hosts and backup for the other virtual hosts.

Two PSFS filesystems are mounted on each server. The first filesystem

contains the web data accessed via the virtual hosts and is mounted at

/www on each server. The directory /var/www/html is a symbolic link to

this mountpoint. The second filesystem contains the log files generated

by the Web activity and is mounted at /httpd-logs on each server. The

directory /var/log/httpd is a symbolic link to this mountpoint.

Failover Support for Client Requests

The configuration includes virtual hosts, HTTP service monitors, and

SHARED_FILESYSTEM device monitors to ensure that clients can always

access the Web site.

• If a server (or its network interface) fails, any virtual hosts that are

active on that server (or network interface) will fail over to a backup

server. The client requests will then be processed on that server.

FC switch

Client requests to

www.xvz.com

svr1

Primary

for virtual

host xvz1

/www

filesystem

/httpd-logs

filesystem

Public network

99.10.20

Administrative network

99.120.0

svr2

Primary

for virtual

host xvz2

svr3

Primary

for virtual

host xvz3

svr4

Primary

for virtual

host xvz4