This pattern shows you how to migrate an Amazon Relational Database Service (Amazon RDS) for Oracle DB instance from one AWS account to another AWS account. The pattern applies to scenarios where the source AWS account doesn't use AWS Managed Services (AMS) but the target account does use AMS. You can complete the migration by using a request for change (RFC) in AMS instead of using the AWS Management Console to perform database operations. This approach provides minimal downtime for a multi-terabyte Oracle source database with a high number of transactions. For example, the downtime for a 400–900 GB database could last for approximately two or three hours. Database migration time is directly proportionate to the size of the Amazon RDS for Oracle DB instance.
