Configuring Load Balancing & High Availability Features; Configuring Server Load Thresholds - MACROMEDIA COLDFUSION 4.5-ADMINISTRING COLDFUSION SERVER Manual

Chapter 6: Creating Scalable and Highly Available Web Sites
Deleting a cluster
To delete an entire cluster, individually delete each member from the cluster using the
procedure above. When the last cluster member has been removed, the cluster itself is
deleted.
Note
Configuring Load Balancing & High Availability Features
If you created your clusters manually, you now need to configure each server member
with appropriate load balancing and high availability features. You use the
ClusterCATS Explorer to configure these features.
To manually configure or modify your clusters' load balancing and high availability
features, perform the following tasks before activating them:

Configuring server load thresholds

Configuring session-aware load balancing
Configuring ColdFusion probes
Integrating ClusterCATS with load balancing devices
Configuring administrator alarm notifications
Configuring administration e-mail support
Configuring cluster administration security
Configuring server load thresholds
ClusterCATS makes certain that your ColdFusion Web applications remain available
and running at optimum performance by intelligently managing the amount of HTTP
traffic hitting your clustered servers. By setting load thresholds on each server in your
cluster, you can control and manage your site's availability and performance. Many of
your threshold configuration decisions hinge on your site's architecture and where the
bulk of your processing resources need to be allocated.
During an HTTP redirection, ClusterCATS evaluates the cluster's state according to
HTTP server state first, and then ColdFusion server load. This policy is the same in
both centralized and distributed ClusterCATS configurations. In a centralized
ClusterCATS cluster with all Web servers at one site, ClusterCATS only redirects if the
server is busy or restricted.
You must delete the Admin Manager, which is the first server you added
to the cluster, last to delete the cluster. You can determine which server is
the Admin Manager by right clicking on the cluster icon and choosing
Configure>Administration. The cluster's Properties dialog box appears
displaying the Administration tab. The server designated as the Admin
Manager will be the active entry in the drop-down list.
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