We are pleased to announce support for running Amazon RDS MySQL Read Replicas in Amazon Virtual Private Cloud (Amazon VPC). Read Replicas provide the capability to scale out beyond the capacity constraints of a single DB Instance for read-heavy database workloads. Read replicas in Amazon VPC provide you read scalability inside Amazon VPC environments.
Amazon VPC allows you to define a virtual network topology and customize the network configuration to closely resemble a traditional network that you might operate in your own datacenter. You can now take advantage of the manageability, availability and scalability benefits of Amazon RDS DB Instances in your own isolated network.