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From Reynir Hübner <>
Subject RE: Do I need 1 or n Tomcats ?
Date Mon, 05 May 2003 17:23:46 GMT

I think you might at some point want to setup 2 instances of tomcat, running the same applications
on the same machine, only to have two loadbalanced JVM working with your applications, just
for failover. If one crashes you still have another one running, you could even setup watchdogs
to watch each instance of tomcat and start it up again, if it goes down. 

You would have to have apache or some http server in front of those tomcat instances to do
loadbalancing. This kind of setup may be more overhead and there for not really what you want,
it may result in less performance but you should be getting more uptime, if done correctly.

I think how many users you have is not relevant for this question, as you should not espect
this to increase performance. 

Hope it helps

> -----Original Message-----
> From: Chakravarthy, Sundar [] 
> Sent: 5. maí 2003 15:49
> To: Tomcat Users List
> Subject: Do I need 1 or n Tomcats ?
> HI
> I have apache2.0.43/Tomcat 4.1.18/Oracle-DBCP pooling working 
> fine on a 2 GB - 2 CPU Solaris enviroment with about 30 
> users. Oracle runs on a separate quad-cpu box.
> The plan is to move to similar production environment with 
> ~300 total users with roughly 10 concurrents users. 
> Under what circumstances would multiple Tomcat instances help me ? 
> Thanks
> Sundar
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