Amazon Aurora

Amazon Aurora is a MySQL- and PostgreSQL-compatible relational database engine built for the cloud. It combines the performance and availability of commercial databases with the simplicity and cost-effectiveness of open-source engines. Aurora delivers up to five times the throughput of MySQL and three times the throughput of PostgreSQL — without requiring changes to your application code.

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Architecture — What Makes Aurora Different

Shared Distributed Storage

Traditional RDS instances store data on a single EBS volume attached to the primary instance. Aurora decouples compute from storage:

• Data is stored in a shared, distributed storage layer spread across three Availability Zones
• Six copies of your data are maintained — two copies in each AZ
• The storage volume grows automatically in 10 GiB increments up to 128 TiB
• You never need to provision or manage storage; you pay only for what you use

How the Six Copies Protect You