PAS-C01 Design of SAP Workloads on AWS Practice Question
A company runs SAP ERP on AWS using an Oracle database. To meet disaster recovery requirements, they need to replicate the database to a second AWS Region with low RPO. Which AWS service should be used for continuous, asynchronous replication of the Oracle database?
⚠ Common exam trap
Test-takers frequently confuse cross-region read replicas (which do not exist for Oracle RDS) with cross-region replication capabilities, or mistakenly think that S3 CRR can replicate live database changes, when in fact it only replicates static objects like backup files.
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
✓
AWS Database Migration Service (DMS) with ongoing replication from the source Oracle database to a target Oracle database in the DR Region.
AWS Database Migration Service (DMS) with ongoing replication is the correct choice because it supports continuous, asynchronous change data capture (CDC) from an on-premises or EC2-hosted Oracle source to a target Oracle database in another AWS Region, achieving low RPO by replicating transactions in near real-time without requiring application downtime. This meets the DR requirement for cross-region replication of an Oracle database with minimal data loss.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Copy the EC2 instance with the Oracle database as an AMI to the DR Region.
Why it's wrong here
AMI copy is not continuous replication.
- ✓
AWS Database Migration Service (DMS) with ongoing replication from the source Oracle database to a target Oracle database in the DR Region.
Why this is correct
DMS supports continuous replication with low RPO.
- ✗
Amazon S3 Cross-Region Replication (CRR) to replicate database backups.
Why it's wrong here
CRR replicates objects, not live database changes.
- ✗
Amazon RDS for Oracle Read Replicas in the DR Region.
Why it's wrong here
Read Replicas are not cross-Region for Oracle.
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