Galera Cluster is already the way to achieve active/active HA for OpenStack back-end databases. Yet, it is possible to do a great deal more: Galera can provide cloud user with a fully redundant database cluster in place of the traditional single-node MySQL or legacy replication or Amazon RDS. With the new geo-distribution features, it is also possible to create databases that span regions and availability zones. This provides protection against whole-datacenter disasters and power outages.
