Contents > Configuring and Administering ColdFusion MX > Using Multiple Server Instances > Overview of multiple server instances

Overview of multiple server instances

When using the J2EE install, you can define multiple server instances on a single machine, each running ColdFusion MX. Running multiple instances of ColdFusion MX has the following advantages:

• Application isolation You deploy an independent application to each server instance. Each server instance has separate settings and because each server instance runs in its own JVM, problems encountered by one application have no effect on other applications.
• Load balancing and failover You deploy the same application to each server instance and add the instances to a cluster. The web server connector optimizes performance and stability by automatically balancing load and by switching requests to another server instance when a server instance stops running.

The remaining discussions in this chapter assume that you have installed JRun. If you have not installed JRun, rerun the ColdFusion MX Enterprise install, selecting the JRun with CFMX option. This installs JRun and deploys ColdFusion MX as an expanded EAR in the cfusion JRun server.

Note: Discussions in this chapter apply to running ColdFusion MX Enterprise as a J2EE application deployed on top of a J2EE application server. Although the examples in this chapter describe using JRun 4, other J2EE application servers provide equivalent capabilities, and most of the concepts described in this chapter apply when deploying ColdFusion MX Enterprise on those J2EE servers.

File location considerations

In the J2EE configuration, you can store CFM pages either under the external web server root or under the ColdFusion web application root. ColdFusion MX first looks for CFM files in the web application root and then looks in the external web server root.

The discussions in this chapter assume that you are using an external web server and that you store your CFM pages under the external web server root.

Contents > Configuring and Administering ColdFusion MX > Using Multiple Server Instances > Overview of multiple server instances

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