It looks like Sequoia will not only do load balancing & failover (i.e, if one database cluster goes down, the others will pick up), but it also does database distribution/replication: anonymous wrote : The database is distributed and replicated among several nodes and Sequoia balances the queries among these nodes Assuming you don't need a HUGE amount of database storage (i.e., you can do with an amount of storage limited by a given server, say 3 500GB hard drives per box), then the storage here would seem to be pretty redundant. Imagine 3 database boxes, each with 1500GB of storage. The database would be replicated across the 3 database servers (using Sequoia), and if one database box goes down, Sequoia just doesn't redirect database requests to the dead box anymore. Of course, if one were thinking of opening a webmail service where millions of users were granted 2GB of mail storage each, then such a solution would not scale. Instead, a SAN would probably be a better bet for storage redundancy/availability, and expansion. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3961101#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...