Aurora is cloud optimized mysql and postgres compatible relational database.
Aurora provides performance and durability by implementing a fully distributed and self healing storage system and it also provides availability by using the elasticity and management capabilities of AWS Cloud
Aurora has two flavors
Compatible with versions 5.6 and 5.7
Compatible with version 9.6
Aurora deals with storage bit differently to regular RDS. There is a separate storage layer that is automatically replicated across six different storage nodes in three AZ’s
All of the data mirroring happens synchronously, hence no data loss. At the same all the data is continuously backed up to S3 to ensure durability & availabilty
On an avergae we can get upto five times increase in performance running an Aurora database compared to regular mysql or postgres engine