SAP-C02 Practice Question: Accelerate Workload Migration and Modernization
A company is migrating a large-scale Oracle data warehouse to Amazon Redshift. The migration must minimize downtime. The source database is 10 TB and runs on a single on-premises server with 1 Gbps network. Which approach should be used for the initial data load?
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 Snowball Edge to transfer data to S3, then copy to Redshift.
Using AWS Snowball Edge devices for offline transfer avoids network bandwidth limitations and provides fast, secure transfer of large data volumes. Option A is wrong because 1 Gbps network would take over 22 hours and may cause congestion. Option B is wrong because DMS works for ongoing replication but initial load over network is slow. Option D is wrong because S3 Transfer Acceleration only speeds up S3 uploads, not the full pipeline.
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 DMS to migrate data directly to Redshift over the network.
Why it's wrong here
Network speed is insufficient for 10 TB initial load.
- ✓
Use AWS Snowball Edge to transfer data to S3, then copy to Redshift.
Why this is correct
Offline transfer bypasses bandwidth constraints.
- ✗
Use AWS DMS with ongoing replication after initial load via network.
Why it's wrong here
Initial load still limited by network.
- ✗
Use S3 Transfer Acceleration to upload data to S3, then COPY to Redshift.
Why it's wrong here
Still limited by last-mile upload speed.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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