PAS-C01 Migration Practice Question
A financial services company is migrating its SAP HANA-based system from on-premises to AWS. The system is critical and must have a recovery point objective (RPO) of less than 1 minute and recovery time objective (RTO) of less than 15 minutes. The migration strategy is to use SAP HANA System Replication (HSR) in synchronous mode to an EC2 instance in the same region, then perform a takeover. However, during the test, the HSR replication latency is consistently above 100 ms, which prevents synchronous replication from working. The network between on-premises and AWS uses AWS Direct Connect with 1 Gbps bandwidth, and the physical distance is about 50 miles. Which action should the administrator take to achieve the RPO/RTO requirements?
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
✓
Deploy the target EC2 instance in an AWS Local Zone closer to the on-premises data center.
Synchronous HSR over long distance is challenging due to latency. Option A is correct because AWS Local Zones reduce latency by placing the target closer to on-premises. Option B is wrong because using a Site-to-Site VPN adds more latency compared to Direct Connect. Option C is wrong because asynchronous mode does not meet the RPO of less than 1 minute. Option D is wrong because increasing bandwidth to 10 Gbps does not reduce latency; the issue is distance, not bandwidth.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Deploy the target EC2 instance in an AWS Local Zone closer to the on-premises data center.
Why this is correct
Local Zones reduce physical distance and latency.
- ✗
Use a Site-to-Site VPN instead of Direct Connect.
Why it's wrong here
VPN typically adds latency.
- ✗
Use asynchronous HSR mode instead of synchronous.
Why it's wrong here
Asynchronous mode may not meet RPO of <1 minute.
- ✗
Increase the Direct Connect bandwidth to 10 Gbps.
Why it's wrong here
Bandwidth does not reduce latency.
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