Moving off from legacy databases
Many existing applications are built on legacy databases, and customers have had to deal with old-guard database providers that are expensive, proprietary, have a high lock-in, impose punitive licensing terms, and perform frequent audits. For example, Oracle announced they would double their licensing costs if you run their software on AWS or Microsoft. Because of this, customers are trying to move as fast as possible to open-source databases like MySQL, PostgreSQL, and MariaDB.
However, getting the same performance on open-source databases as on commercial-grade databases is complex and requires a lot of tuning. Customers that are moving to open-source databases are looking for the performance of commercial-grade databases with the pricing, freedom, and flexibility of open-source databases.
To fill this gap, AWS launched Amazon Aurora, a MySQL and PostgreSQL compatible relational database built for the cloud that combines the performance and availability...