Amazon RDS Multi-AZ with two readable standbys for RDS PostgreSQL now supports inbound replication
Amazon Relational Database Service (Amazon RDS) for PostgreSQL now supports inbound replication from Amazon RDS Single-AZ database (DB) instances and Amazon RDS Multi-AZ DB instances with one standby to Amazon RDS Multi-AZ deployments with two readable standbys. You can use this inbound replication to help migrate your existing Amazon RDS PostgreSQL deployments within minutes to Amazon RDS Multi-AZ deployments with two readable standbys, which have one writer instance and two readable standby instances across three availability zones. By creating a Multi-AZ deployment with two readable standbys as a read replica of your existing RDS PostgreSQL database instance, you can promote the read replica to be your new primary, typically within minutes.