DBS-C01 Deployment and Migration Practice Question
A company is migrating a 500 GB Oracle database to Amazon RDS for Oracle. The migration must be completed within 24 hours with minimal downtime. The on-premises network bandwidth is 1 Gbps. The migration team plans to use AWS DMS with ongoing replication. During the initial load, the DMS task fails with an error indicating that the source database is experiencing high CPU utilization. The source database is a production system serving live traffic. The team needs to reduce the impact on the source database while still meeting the migration deadline. Which approach should the team take?
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
✓
Reduce the number of tables loaded in parallel in the DMS task and schedule the migration during off-peak hours
The issue is that DMS is consuming too many resources on the source. Reducing the number of tables loaded in parallel and scheduling the migration during off-peak hours will reduce CPU impact. Option B is the most balanced. Option A (increase DMS instance size) would increase source CPU usage. Option C (change to full load only) would require downtime. Option D (use Snowball) may not meet the 24-hour deadline due to shipping time.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Change the DMS task to perform only full load and skip ongoing replication
Why it's wrong here
This would require downtime for the final cutover, exceeding minimal downtime requirement.
- ✓
Reduce the number of tables loaded in parallel in the DMS task and schedule the migration during off-peak hours
Why this is correct
This reduces source CPU load and still meets the deadline if off-peak window is sufficient.
- ✗
Increase the size of the DMS replication instance to speed up the migration
Why it's wrong here
Larger DMS instance may increase source CPU usage due to parallelization.
- ✗
Use AWS Snowball to transfer the data offline and then use DMS for ongoing replication
Why it's wrong here
Snowball shipping may take days, exceeding the 24-hour deadline.
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This DBS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DBS-C01 exam.