Configuring Web Server Ip Address Fail-Over - MACROMEDIA COLDFUSION 5 - INSTALING AND CONFIGURING SERVER Manual

Before You Install ColdFusion Server
Host Name
www.company.com
www.company.com
www1.company.com
www2.company.com
www3.company.com
www4.company.com
IP Address
193.168.0.1
193.168.0.2
193.168.0.3
193.168.0.4
Round-robin DNS distributes the initial domain-level requests across all four
servers. Thereafter, ClusterCATS distributes load to avoid failed or overloaded
servers.
Note
When using round-robin DNS, do not define a reverse mapping (PTR record) for the
site name (www.company.com); the cluster does not operate properly if you do.
Only define forward mappings (A records) for www.company.com. However, define
both A records and PTR records for all of the explicit servers (www1, www2,...) in the
cluster. This configuration ensures that requests cycle through the servers
sequentially in round-robin fashion.

Configuring Web server IP address fail-over

ClusterCATS protects clusters from server hardware and software failures. When a
server stops sending or receiving packets from the network, another member
assumes its IP address (and therefore, its HTTP requests), and picks up all HTTP
traffic originally addressed to the failed server. Server failover services are provided
on a per subnet basis.
You can select the Webserver (IP address) fail-over option during the installation
process. If you do not select it during installation, you must reinstall ClusterCATS
and select that option. Preparing your site for ClusterCATS server failover can
require uninstalling your Web server software. For more information on using server
failover in Windows systems, see Advanced ColdFusion Administration.
IP Address
193.168.0.3
193.168.0.4
193.168.0.1
193.168.0.2
193.168.0.3
193.168.0.4
Host Name
www1.company.com
www2.company.com
www3.company.com
www4.company.com
139