This document discusses Amazon Relational Database Service (RDS) and Aurora Serverless on AWS. It provides an overview of RDS features including managed database services, scalability, redundancy, backup and support for MySQL, PostgreSQL, Oracle, SQL Server and Aurora. Aurora provides additional performance and fault tolerance compared to RDS. The document also mentions DynamoDB for NoSQL databases and announcements from AWS Reinvent 2017 including DynamoDB Global Tables, RDS Aurora Multi-Master and Inter Region VPC Peering. It notes that while Aurora Serverless provides scalability, there are limits and full compatibility with PostgreSQL may be delayed.