Chapter 6: Creating Scalable and Highly Available Web Sites
As you can see, this scenario involves Company ABC, which has an East Coast and a
West Coast group of servers connected to the Internet via several firewalls. The
ClusterCATS Explorer resides at the corporate headquarters behind a firewall with a
direct connection to the Internet.
You must open and configure the appropriate communication ports on your firewalls
to allow server to server communication in a distributed setting and server to client
communication.
Note
These ports include the following:
Port 9123 (for TCP and UDP access)
Opening port 9123 on your firewall allows multiple, distributed server clusters
residing in different locations to communicate with one another across
firewalls.
Port 9129 (for TCP and UDP access)
Opening port 9129 on a firewall allows the ClusterCATS Explorer to
communicate with multiple, distributed server clusters across firewalls.
Installing ClusterCATS
ClusterCATS is an embedded installation option in the ColdFusion Server installation
program. To install the ClusterCATS load balancing and high availability capabilities
on each of your servers, run the ColdFusion Server installation program on each server
that will be part of your cluster and choose the Load Balancing and High Availability
install option. Also, run the installation program to install ClusterCATS on a separate,
non-clustered machine from which you will administer your clusters using the
ClusterCATS Explorer.
To install ClusterCATS on Windows NT servers:
1.
Insert the ColdFusion Server v4.5 CD into your CD drive or access it from your
network jukebox (Enterprise users).
2.
Click Start>Run to display the Run dialog box.
You must open both ports on all affected firewalls.
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