Willem Noorduin [http://community.jboss.org/people/willemnoorduin] created the 
discussion

"Hypersonic databases"

To view the discussion, visit: http://community.jboss.org/message/636771#636771

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We have implemented JBoss-clustering (JBoss 5.1.1.GA) with success, only to be 
production ripe, it is in general recommended to replace the Hypersonic 
Database with another (say Oracle or MySQL). The technical aspect is clear, 
just replace your hypersonic datasource with another JDBC Connector to 
DefaultDS and let JBoss take care of the rest. There are a few questions:

* I have seen one Hypersonic database connection per JBoss profile. Does this 
mean we have to implement n seperated Oracle databases when we run n JBoss 
profiles, or can you do it per cluster (so, if 4 JBoss-profiles form a JBoss 
cluster, point these to the same Oracle database ? Notice I am using Oracle 
here because I want to stress the cost aspect, and yes, I know that MySQL won't 
cost you anything).
* What information is saved to the database when you are using all the 
capacities of JBoss ? (I only saw one counter, but then again, I just ran some 
rediculously easy test application).
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