Multiple Tomcat Instances as a Service

Yesterday I posted how to set up Multiple instances of Tomcat running Railo. The whole setup turned out to be relatively painless.

Running the multiple instances as a service is a small improvement that can make life a little easier. A small adjustment to the service.bat file is all that is needed in the Windows environment, a startup script for the linux environment could also be made/modified in a similar way.

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Creating a Multi-Instance Railo Install with Tomcat

If you want to run multiple instance of Railo on a single server then keep reading because I am going to show you how to do just that using a single physical Tomcat and Railo install.

Requirements

You will need to have the latest Java JDK installed, then grab Tomat 6 zip, and Railo 3.1.2 Jars.

Once you have downloaded the required files we can begin.

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Monitoring Your Cluster

So you have set up your Railo cluster using Apache and Tomcat as described in the Clustering Railo with Tomcat and Apache article and as far as you know the cluster is performing exactly as expected, or is it? The problem is unless you actually check the tomcat instances you really don't have a clue if one of the Tomcat instances are down. Luckily there is a relatively simple way to set up a monitor to monitor your cluster.

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Using ProxyPassMatch

Building on from the Clustering Railo with Tomcat and Apache article we set up the Railo Tomcat cluster but it was set up to send all requests on to Tomcat. While in a low traffic site sending every single request to Tomcat for processing may not be a big deal, you probably haven't gone through the trouble of setting up a cluster for a low traffic environment therefore, you certainly want to squeeze as much performance out of your available resources.

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64Bit Windows Tomcat Service

If you have a 64Bit windows install you will soon realize that you can't install Tomcat as a service using the Windows Service Installer located on the Tomcat website.

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Clustering Railo with Tomcat and Apache

This post is a result of a request from a client of ours to have a Railo cluster. The original idea was to use jBoss but ended up settling on stand-alone Tomcat instead.

We are going to set up a "High-Availability" cluster with load balancing using Apache to perform the proxying, Tomcat as our servlet container and Railo to serve up our CFML. You notice that I placed high availability in quotation marks; this is because while automatic failover will be enabled our sessions won't be replicated to all nodes in the cluster. The reason we won't be replicating the sessions is mainly because of performance reasons.

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