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From Andre-John Mas <>
Subject Multiple data centers and redundency?
Date Wed, 26 Aug 2009 00:30:22 GMT

I have been asked to look into a solution that would involve a few  
different data centres each with their own set of load balanced Tomcat  
servers. The requirement is for the users not to lose their session if  
one data center goes down. I have never had to work on something this  
large and have no idea to what extent this can be achieved with Tomcat.

My initial thoughts would be for each data center to have a session  
pool, which is synced with each other, so if ever a Tomcat server or  
data center goes down they can check in the pool to see if it exists  
and then reuse that. It would mean extra communication behind the  
scene, but I see no other way go about it.

Any help would be appreciated.

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