DBS-C01 Deployment and Migration Practice Question
A company is migrating a 500 GB MySQL database to Amazon Aurora MySQL. The migration must have minimal downtime and the source database is already using binary logging. Which migration approach should be used?
⚠ Common exam trap
Many candidates choose mysqldump or snapshot because they are familiar backup methods, but they fail to recognize that these approaches require the source database to be offline or locked, which contradicts the minimal downtime requirement.
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
✓
Set up binary log replication from the source to an Aurora MySQL cluster
MySQL native binary log replication can be set up directly from a source MySQL database to an Amazon Aurora MySQL cluster. Since binary logging is already enabled, the Aurora cluster can act as a replica, synchronizing continuously with minimal downtime. This approach allows a full load followed by ongoing replication, meeting the requirement for near-zero downtime 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.
- ✗
Take a snapshot of the source database and restore to Aurora
Why it's wrong here
Snapshot restore requires downtime and does not capture ongoing changes.
- ✗
Use AWS DMS with full load only
Why it's wrong here
Full load only does not capture ongoing changes, leading to downtime.
- ✓
Set up binary log replication from the source to an Aurora MySQL cluster
Why this is correct
Binary log replication allows minimal downtime by continuously replicating changes.
- ✗
Use mysqldump to export the data and import into Aurora
Why it's wrong here
mysqldump requires downtime during the export and import process.
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