Chapter 6: Using Multiple Server Instances; Overview Of Multiple Server Instances - MACROMEDIA COLDFUSION MX 61 - CONFIGURING AND ADMINISTERING COLDFUSION MX Manual

When you install ColdFusion MX Enterprise using a J2EE deployment, you can use J2EE
application-server-specific functionality to create multiple server instances. Deploying
ColdFusion MX on multiple server instances lets you isolate individual applications and leverage
clustering functionality.
Contents
Overview of multiple server instances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Defining additional server instances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Deploying ColdFusion MX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Enabling application isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Enabling load balancing and failover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

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
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
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.
Using Multiple Server Instances
You deploy an independent application to each server instance. Each
You deploy the same application to each server instance and
CHAPTER 6
75