http://aws-musings.com/database-in-cloud-should-i-use-amazon-rds-or-mysql-installed-on-an-ebs-backed-ec2-instance/

Recently Amazon launched RDS – Relational Database Service. Before Amazon offered this service, we had a MySQL configured on an ec2 instance. We needed one more database in cloud. Which way did we go? In this article, I have tried to compare both the options.