How to: RDS Aurora MySQL Gotchas and Limitations
- 🔸[Aurora 1.x is based on MySQL 5.6.x](https://news.ycombinator.com/item?id=12415693) with some cherry-picking of later MySQL features. It is missing most 5.7 features as well as some online DDL features introduced in 5.6.17.
- 🔸[Aurora 2.x is based on MySQL 5.7.x](https://aws.amazon.com/about-aws/whats-new/2018/02/amazon-aurora-is-compatible-with-mysql-5-7/)
- Aurora does not support GTID transactions in either the 5.6/Aurora 1.x or the 5.7/Aurora 2.x release lines.
- Aurora maximum cluster size is 64 TB

RDS Aurora PostgreSQL
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