DBS-C01 Deployment and Migration Practice Question
A company is migrating an on-premises Oracle database to Amazon RDS for Oracle. The database is 1 TB and has a large number of stored procedures and triggers. The migration must minimize application changes. Which migration approach should be used?
⚠ Common exam trap
Candidates often assume AWS SCT is required for any Oracle migration, but SCT is only needed when changing database engines; for a homogeneous migration to RDS for Oracle, DMS alone suffices, and using SCT would introduce unnecessary schema conversion risks.
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
✓
Use AWS Database Migration Service (AWS DMS) with full load and ongoing replication
AWS DMS with full load and ongoing replication minimizes application changes by supporting heterogeneous migrations with minimal downtime, and it can handle stored procedures and triggers by replicating data changes in near real-time without requiring schema conversion. AWS DMS directly supports Oracle as a source and Amazon RDS for Oracle as a target, preserving the existing schema and procedural logic, which avoids the need for application rewrites.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use AWS Schema Conversion Tool (AWS SCT) to convert the schema and AWS DMS for data migration
Why it's wrong here
Schema conversion is not needed since source and target are both Oracle.
- ✓
Use AWS Database Migration Service (AWS DMS) with full load and ongoing replication
Why this is correct
AWS DMS supports ongoing replication to minimize downtime.
- ✗
Use Oracle Data Pump (expdp/impdp) to export and import the database
Why it's wrong here
Data Pump is a one-time migration, not suitable for minimal downtime.
- ✗
Use AWS S3 to store the data and AWS Glue to transform and load into RDS
Why it's wrong here
This approach is complex and not designed for database migration with minimal downtime.
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