I know you heard about the Amazon outage in a specific store when migration from Oracle to Aurora. But what you didnt heard is: they already migrate 88% of their Oracle park to Aurora, and the only real issue was what came to public (of course).

So, if you wanna to check out this how to, how to use AWS DMS service, grab a coffee and follow the link below:

https://aws.amazon.com/blogs/database/best-practices-for-migrating-an-oracle-database-to-amazon-rds-postgresql-or-amazon-aurora-postgresql-migration-process-and-infrastructure-considerations/

See you Around,