A company needs to migrate a 50 TB Oracle database from their on-premises data center to Amazon RDS for PostgreSQL. The migration must have near-zero downtime. Which combination of AWS services should be used?

Answer options:

AWS DataSync and Amazon S3.

AWS Schema Conversion Tool (SCT) and AWS Database Migration Service (DMS).

AWS Application Migration Service (MGN).

AWS Snowball Edge and native Oracle export/import tools.

How to approach this question

Identify the tools for heterogeneous database migration (SCT) and continuous replication (DMS).

Full Answer

B.AWS Schema Conversion Tool (SCT) and AWS Database Migration Service (DMS).✓ Correct

For heterogeneous migrations (Oracle to PostgreSQL), AWS SCT is used to convert the database schema. AWS DMS is then used to migrate the data and keep the source and target in sync until the cutover, enabling near-zero downtime.

Common mistakes

Choosing MGN, which cannot change the database engine during migration.

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