Why should you use Galera instead of the classical MySQL replication!

Some reasons:

• Galera is multi-master, NO SPOF!
• Galera is synchronous, MySQL is asynchronous. MySQL 5.5 seems to be half-sync. Which implies no latency from the other nodes
• Galera is multi-threaded, MySQL is single-threaded
• Galera is easy-to-scale, MySQL needs to be configured manually
• Galera accepts writes and reads to any node, which brings tremendous performance
• Galera doesn’t need pacemaker, no failover, etc…
• Galera works nice with WAN replication
• Automatic membership control (TOTEM protocol)
• No slave lag
• No binlog position to set
• Mix well with load-balancer: HAProxy, pen, GLB, LVS…
• Percona repos available

Not everything’s perfect like:

• Galera only supports InnoDB engine, pass this one.
• The MySQL version is patched
• Require at least 3 nodes (true limitation?), 2 nodes + garbd is also ok

If you are still not convinced, give a try!