Managed relational database service for OLTP use cases

Manages setup, backup, scaling, replication and patching

Supports PostgreSQL, MySQL (InnoDB storage engine full supported), MariaDB

(Enhanced MySQL), Oracle Database and Microsoft SQL Server

Features:

Multi-AZ deployment (standby in another AZ)

Read replicas (Same AZ or Multi AZ (Availability+) or Cross Region(Availability++) )

Storage auto scaling (up to a configured limit)

Automated backups (restore to point in time)

Manual snapshots

Responsibilities:

AWS is responsible for:

Availability, Scaling (based on your cnfgn.), Durability, Maintenance (patches) and Backups

You are responsible for:

Managing database users

App optimization (tables, indexes etc)