what is MySQL Cluster?
MySQL Cluster combines the world’s most popular open source database with a parallel-server, fault tolerant clustering architecture so you can deliver mission-critical database applications with 99.999% availability. MySQL Cluster maximizes the availability of your business applications in an open and cost-effective manner. MySQL Clusters enables organizations to overcome the traditional barriers to adopting high-availability clustering solutions by: • Reducing software costs with an affordable licensing model. • Reducing hardware costs by running on commodity hardware. • Reducing operating costs by reducing the need for specialized administration skills.