THE CONCEPT The concept of an active/passive fail-over Cluster is the following: You have 2 servers (also called nodes). They communicate over a cluster software (Heartbeat, Corosync, OpenAIS, Red Hat Cluster Suite). They are running on DRBD or have a shared storage (SAN, NAS) connected to both nodes. MySQL is only running on ONE node (active), the other node does nothing (passive). You reach MySQ...Read More..