PAS-C01 SAP DMO with 'load and move' Practice Question
A company is migrating its SAP ERP system running on Oracle Database to SAP HANA on AWS. The current on-premises environment has a 5 TB Oracle database with high transaction volume. The migration must be completed within a 4-hour downtime window. The target environment on AWS uses an SAP-certified instance with 1 TB of RAM. The company has a 1 Gbps AWS Direct Connect connection. The migration team is considering using SAP DMO with SUM. However, during a test run, the database export took 6 hours, exceeding the downtime window. What should the migration team do to meet the 4-hour downtime window?
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 the SAP HANA Database Migration Option (DMO) with the 'load and move' method
Using the SAP HANA Database Migration Option (DMO) with the 'load and move' method allows the initial data load to be performed during the preparation phase before the downtime window, and only a delta transfer (incremental data) during the actual downtime. This significantly reduces the downtime required compared to the standard DMO method that does the full export and import during downtime. Option A is wrong because performing a system copy to Oracle on AWS first does not directly migrate to SAP HANA and adds unnecessary steps and time. Option C is wrong because upgrading to a larger EC2 instance may improve processing speed but does not address the bottleneck of the 1 Gbps network bandwidth; the export time is limited by network speed. Option D is wrong because AWS Snowball Edge introduces additional time for shipping and data transfer, which would likely exceed the 4-hour window, and it is not optimized for the delta sync required for such a short downtime.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Perform a system copy to an Oracle database on AWS first, then migrate to HANA
Why it's wrong here
Performing a system copy to an Oracle database on AWS first then migrating to HANA adds an extra step and does not reduce downtime; the full export/import would still be required, likely exceeding the 4-hour window.
- ✓
Use the SAP HANA Database Migration Option (DMO) with the 'load and move' method
Why this is correct
The SAP DMO with 'load and move' method enables the initial data load to be done before the downtime window, with only a delta sync during the downtime, thus meeting the 4-hour constraint.
- ✗
Upgrade to a larger EC2 instance type with more CPU and memory for the HANA database
Why it's wrong here
Upgrading to a larger EC2 instance may improve processing speed, but the migration time is often limited by database export/import and network throughput; this change alone is unlikely to reduce downtime to 4 hours.
- ✗
Use AWS Snowball Edge to transfer the initial data and then perform a delta sync
Why it's wrong here
AWS Snowball Edge requires physical shipping and data transfer, which adds significant time and complexity; the delta sync over 1 Gbps would still be needed, and the 4-hour window would likely be exceeded.
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