Using Maintenance Mode (Windows Only) - MACROMEDIA COLDFUSION MX-CLUSTERCATS Use Manual

Using maintenance mode (Windows only)

Putting a ClusterCATS Server in maintenance mode lets you remove a server from an
active cluster gracefully, so you can perform necessary updates or maintenance tasks
without disrupting your users. Using the instructions in this section, you can take a
server offline while allowing users to finish their current sessions.
Once the server is in maintenance mode, you can perform the following tasks that would
normally disrupt users' experiences:
Upgrading server software or applications
Change content on the website
Troubleshooting problems
When a server is in maintenance mode, inbound HTTP traffic for the affected server is
redirected to the most available server in the cluster. After you complete your
maintenance tasks and take the server out of maintenance mode, the servers that
temporarily assumed the restricted server's IP address and HTTP traffic return the IP
address to the affected server so it can receive and process HTTP requests.
Note: Macromedia recommends that you set up your clusters with ClusterCATS dynamic
IP addressing for using maintenance mode. For more information, see
on page
When it is enabled, maintenance performs the following:
The Clustered Web Server on the system is set to a busy state for a user-specified
period of time. New traffic to the website is redirected to another server in the cluster.
If you are running session-aware load balancing, users who have begun sessions can
continue until the ClusterCATS service is shut down.
When the timeout period has expired, the ClusterCATS service will be shut down.
If ClusterCATS dynamic addressing is active, the IP addresses associated with cluster
members for this server will be failed over to another server, thus allowing the site to
continue to function while maintenance is performed.
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Using maintenance mode (Windows only)

"Using server failover"
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