Hi, Just a heads up wrt http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4240216#... What this guy is asking is very similar to what Amazon Dynamo already provides where the replication group is always formed of nodes located in different geographic sites. If there was an option such that each node in a replication group is located in a different site, we'd have a solution where all the sites are active at the same time and we could potentially direct clients to the nearest site. This could be something we provide instead or on top of http://www.jboss.org/community/wiki/ReplicationAcrossDataCentres. This wiki and solutions discussed here focused on backing up, asynchronously, to an offline, or standby site, in case the other one suffered a major catastrophic failure. Regards, -- Galder Zamarreño Sr. Software Engineer Infinispan, JBoss Cache