You can use Aurora Read Replicas to migrate from an Amazon RDS DB Instance for MySQL to Amazon Aurora. The migration process begins by creating a DB snapshot of the existing DB Instance and then using it as the basis for a fresh Aurora Read Replica. After the replica has been set up, replication is used to bring it up to date with respect to the source. Once the replication lag drops to 0, the replication is complete. At this point, you can make the Aurora Read Replica into a standalone Aurora DB cluster and point your client applications at it.
Global secondary indexes support only eventually consistent data model.
Each table in DynamoDB can have up to 20 global secondary indexes (default quota) and 5 local secondary indexes.
You can't share a snapshot that's encrypted using the default AWS KMS encryption key.
Fault injection queries can be only used with Aurora DB cluster and NOT with an RDS DB cluster.