MySQL Database Service High Availability

You can now create MySQL DB Systems with High Availability (HA). A HA-enabled MySQL DB System contains three MySQL instances deployed across different availability or fault domains. Your data is replicated using MySQL Group Replication. Your application connects to a single endpoint to read and write data to the database. In the event of a failure, the DB System will automatically failover to a secondary instance without requiring a reconfiguration of the application.
For more information, see MySQL Database Service High Availability.