RDS

Using Blue/Green Deployment

SQL Server Backup
- https://stackoverflow.com/questions/60923719/how-to-backup-amazon-rds-database-to-s3-bucket-using-lambda-function
- https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ExportSnapshot.html

Postgres Export to S3
- https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/postgresql-s3-export.html