MACROMEDIA COLDFUSION MX-CLUSTERCATS, Use Manual

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110 Chapter 5 Maintaining Cluster Members
Understanding ClusterCATS server modes
ClusterCATS lets you move cluster members into modes of operation depending on the
tasks you want to perform on their server. The modes let you remove servers from
clusters to perform maintenance activities without disturbing the current traffic flow,
among other things.
The following table describes the modes of operation into which you can place cluster
members:
Mode Description
Active/Passive
Setting Turns the ClusterCATS Server on and off. In active state, the
ClusterCATS Server intercepts HTTP requests and processes them for
load balancing and availability. In passive state, HTTP requests are
passed directly to the web server without ClusterCATS Server
interception.
For more information, see “Changing active/passive settings” on page
111 .
Restricted/
Unrestricted
Setting Determines whether active cluster members receive HTTP traffic.
Restricted ClusterCATS Servers do not receive HTTP traffic.
Unrestricted ClusterCATS Servers are sent traffic.
For more information, see “Changing restricted/unrestricted settings” on
page 113 .
Maintenance
Mode Lets you remove a server from a cluster by draining off all users without
cutting connections. You use this when you want to upgrade a server or
remove it entirely from a cluster.
For more information, see “Using maintenance mode (Windows only)”
on page 115 .
Only Windows cluster members can be put in Maintenance mode.