PAS-C01 Technology Practice Question
An SAP Basis administrator needs to migrate an on-premises SAP ERP system running on Oracle to AWS. The system has a 2 TB database and requires minimal downtime (less than 1 hour). The current on-premises network bandwidth to AWS is 1 Gbps. Which migration strategy is MOST appropriate?
⚠ Common exam trap
It's easy for candidates to assume a manual export/import (Option B) is the simplest approach, but they overlook the time constraint of a 2 TB database over 1 Gbps, which makes it impossible to achieve less than 1 hour downtime, while DMS's CDC capability is the key to meeting that 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
✓
Use AWS Database Migration Service (DMS) with ongoing replication from Oracle to Amazon RDS for Oracle, then perform a final cutover.
AWS DMS with ongoing replication from Oracle to Amazon RDS for Oracle is the most appropriate strategy because it supports minimal downtime (less than 1 hour) by continuously replicating changes from the source Oracle database to the target RDS instance, allowing a short final cutover window. The 1 Gbps bandwidth is sufficient for the initial full load of a 2 TB database when using DMS's optimized data transfer, and the target RDS for Oracle provides a fully managed Oracle-compatible environment suitable for SAP ERP workloads.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Export the database using SAP HANA System Replication (HSR) to an Amazon EC2 instance with HANA.
Why it's wrong here
HSR is for HANA databases, not Oracle.
- ✗
Perform a manual export/import using Oracle Data Pump and transfer the dump file via AWS Direct Connect.
Why it's wrong here
Export/import would take longer than 1 hour due to 2 TB size and 1 Gbps bandwidth.
- ✗
Use AWS Application Migration Service (MGN) to replicate the entire server to AWS, then cut over.
Why it's wrong here
MGN replicates the entire OS, not optimized for database-level migration with minimal downtime.
- ✓
Use AWS Database Migration Service (DMS) with ongoing replication from Oracle to Amazon RDS for Oracle, then perform a final cutover.
Why this is correct
DMS supports ongoing replication, enabling minimal downtime cutover.
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