MACROMEDIA COLDFUSION 5 - INSTALING AND CONFIGURING SERVER, Manual

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146 Appendix Preparing Your Server for ClusterCATS
After You Install ColdFusion Server
After you successfully install ColdFusion Server 5 on all members of the cluster and
any administrative systems, you are ready to create your first cluster.
If you are administering ClusterCATS from a Windows NT system, then you can use
the Cluster Setup Wizard or manually create the cluster. For more information, see
Advanced ColdFusion Administration
If you are administering ClusterCATS from a Solaris or Linux system, see Advanced
ColdFusion Administration.
Regardless of the method that you use to create your first cluster, you should
familiarize yourself with the procedures in the following table when implementing
your Web applications in a clustered environment.
Option Description
Load thresholds for servers Two response time thresholds configured for each
server. One threshold defines maximum or busy load;
the second activates load management. If the load for
the server exceeds the busy threshold, no new sessions
can start on that server. If another server in the cluster
has the capacity to handle additional users, requests are
redirected to that server. The load-management
activation threshold is referred to as the gradual
redirection threshold and is designed to prevent the
server from ever reaching the peak threshold.
For more information on load thresholds, see Advanced
ColdFusion Administration.
Email addresses for alarm
recipients ClusterCATS generates alarm notifications for several
events including HTTP server failures, server busy, and
Web server failover. You provide e-mail addresses of all
administrators you want ClusterCATS to notify for each
generated alarm notification.
For more information on ClusterCATS alarms, see
Advanced ColdFusion Administration.
Session-aware load
balancing If your Web applications use session variables that store
information in Web server memory, you should enable
session-aware load-balancing. This feature prevents
users who have established a session from being
redirected to another server as a result of
load-balancing.
For more information on enabling session-aware load
balancing, see
Advanced ColdFusion Administration.
install.book Page 146 Thursday, May 10, 2001 12:59 PM