This document discusses high availability techniques for MySQL databases. It defines high availability as having a high "availability" or uptime, measured by metrics like MTBF and MTTR. The document outlines several techniques to improve high availability, including increasing MTBF through monitoring, testing, and redundancy, and decreasing MTTR through failover capabilities and redundancy. It then discusses several high availability technologies for MySQL, including replication, SANs, DRBD, MySQL Cluster, Percona XtraDB Cluster, load balancing, and more. It concludes by saying recommendations are too complex for the slides and to examine suitable solutions based on needs.