Posted On: May 4, 2022

Amazon Relational Database Service (Amazon RDS) for PostgreSQL announces support for PostgreSQL 14 with three levels of cascaded read replicas, 5 replicas per instance, supporting a maximum of up to 155 read replicas per source instance. You can now create Single-AZ or Multi-AZ cascaded read replica DB instances in same region or any one cross region from another read replica instance, enabling you to build a more robust disaster recovery architecture.

Starting with Amazon RDS for PostgreSQL 14.1 and higher, read intensive workloads such as data analytics can now benefit from up to 155 cascaded read replicas that offer up to 30 times higher read capacity versus previous versions of PostgreSQL, thereby reducing the load on source instance. You can now also pre-create read replicas for your selected disaster recovery target read replica and utilize read scaling immediately after promoting the target. The cascaded read replicas also come with the option to enable automated backup that allows for a quicker promotion of read replica to source instance since only incremental snapshot is required for the promoted read replica. See Working with PostgreSQL read replicas in Amazon RDS to learn more about cascaded read replicas on RDS PostgreSQL.

Amazon RDS for PostgreSQL helps make it easy to set up, operate, and scale PostgreSQL deployments in the cloud. See Amazon RDS for PostgreSQL Pricing for pricing details and regional availability. Create or update a fully managed Amazon RDS database with cascaded read replicas in the Amazon RDS Management Console.