DBS-C01 Deployment and Migration Practice Question
A company is migrating a 2 TB on-premises Oracle database to Amazon RDS for Oracle. The migration must have minimal downtime and support ongoing replication. Which AWS service should be used to accomplish this?
⚠ Common exam trap
The trap here is that candidates might confuse AWS DMS with AWS SCT, assuming schema conversion is needed for an Oracle-to-Oracle migration, but DMS handles both schema and data migration natively for homogeneous migrations without requiring SCT.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS Database Migration Service (AWS DMS)
AWS DMS is the correct choice because it supports homogeneous migrations (Oracle to Oracle) with minimal downtime through ongoing replication using change data capture (CDC). It can handle a 2 TB database by using a large enough replication instance and enabling task logging for validation, ensuring data consistency during the migration.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
AWS Schema Conversion Tool (AWS SCT)
Why it's wrong here
AWS SCT converts database schemas, but does not handle data replication.
- ✗
AWS DataSync
Why it's wrong here
AWS DataSync is for file-based data transfer, not database replication.
- ✗
AWS Glue
Why it's wrong here
AWS Glue is for ETL, not for ongoing database replication.
- ✓
AWS Database Migration Service (AWS DMS)
Why this is correct
AWS DMS supports minimal-downtime migrations and ongoing replication.
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