MySQL high-availability has usually been an exercise in tradeoffs: You can choose asynchronous replication and risk losing committed transactions on a failure. You can choose disk based (DRBD, SAN) replication for better durability but longer failover downtime. Galera replication has finally raised the bar for MySQL HA: You will learn how Galera brings synchronous, true multi-master and high performance (parallel slaves) replication to MySQL. You will learn how to start your first Galera cluster, and how to plan your architecture for maximum resiliency.