DBS-C01 Management and Operations Practice Question
A company is migrating an on-premises Oracle database to Amazon RDS for Oracle. The database is 2 TB in size and has a tight migration window of 8 hours. Which THREE steps should be taken to minimize downtime during the migration?
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 ongoing replication.
AWS DMS with ongoing replication (option C) allows continuous data replication from the source to the target, minimizing downtime during the final cutover. Disabling automated backups on the target RDS instance (option D) reduces I/O overhead and speeds up the migration process. Deploying a large RDS instance class (option E) provides higher network and disk throughput, accelerating the initial data load. Option A is incorrect because a manual snapshot is not used for migration, and option B is incorrect because AWS SCT is for schema conversion, not data replication.
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 manual snapshot of the source database before migration.
Why it's wrong here
Incorrect. Taking a manual snapshot of the source database is not a step in the migration process; it is a backup operation.
- ✗
Use AWS Schema Conversion Tool (AWS SCT) to convert the schema.
Why it's wrong here
Incorrect. AWS Schema Conversion Tool (AWS SCT) is used for schema conversion, not for data replication, and it does not minimize downtime.
- ✓
Use AWS Database Migration Service (AWS DMS) with ongoing replication.
Why this is correct
Correct. AWS Database Migration Service (AWS DMS) with ongoing replication allows continuous replication from source to target, minimizing downtime during the final cutover.
- ✓
Disable automated backups on the target RDS instance during migration.
Why this is correct
Correct. Disabling automated backups on the target RDS instance reduces I/O overhead and speeds up the migration process.
- ✓
Deploy a large RDS instance class to speed up the initial load.
Why this is correct
Correct. Deploying a large RDS instance class provides higher network and disk throughput, accelerating the initial data load.
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