Troubleshooting SAP HANA System Replication on AWS
A company is migrating an SAP HANA database from on-premises to AWS using SAP HANA System Replication (HSR). They have set up the replication but the target database is not in sync. Which THREE configuration items should the migration team verify? (Choose THREE.)
Quick Answer
The answer is to verify that network connectivity and firewall rules allow HSR traffic, that the source and target systems use the same hostname or proper name resolution, and that both systems run the same SAP HANA major version. These three items are critical because SAP HANA System Replication relies on consistent hostname resolution to establish a secure connection, compatible software versions to ensure data consistency, and open ports—specifically port 3<instance>01 for HSR traffic—to synchronize logs and data between the primary and secondary databases. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this question tests your understanding of common misconfigurations during HANA migration, often appearing as a trap where candidates mistakenly focus on storage types or licenses, which are irrelevant to replication sync. A useful memory tip is “HNR”: Hostname, Net (firewall), and Release version—always check these three before troubleshooting deeper issues.
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
✓
The hostname resolution between source and target
HSR requires proper hostname resolution between source and target; if the target cannot resolve the source hostname, replication fails. Option B is correct because HSR requires the same major HANA version and build number; mismatches can prevent synchronization. Option C is incorrect because the SAP HANA license is not required for replication; it is tied to each system individually. Option D is correct because network connectivity and firewall rules must allow traffic on the HSR port (typically 3<instance>01); blocked ports will stop replication. Option E is incorrect because storage type (SSD vs HDD) does not affect HSR synchronization; replication works independently of underlying storage.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The hostname resolution between source and target
Why this is correct
HSR uses hostnames; DNS or /etc/hosts must be correct.
- ✓
The HANA version and build number are compatible
Why this is correct
Version mismatch can prevent replication.
- ✗
The SAP HANA license is activated on the target
Why it's wrong here
License is not required for replication setup.
- ✓
The network connectivity and firewall rules allow HSR traffic
Why this is correct
Port 30101 (or custom) must be open between systems.
- ✗
The storage type (SSD vs HDD) is identical
Why it's wrong here
Storage type does not affect HSR replication.
Visual reference
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
Go deeper
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Same concept, more angles
2 more ways this is tested on PAS-C01
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company is migrating an SAP HANA database to AWS. They have set up HANA System Replication (HSR) between the on-premises primary and an AWS secondary. The initial data synchronization is complete, but during the final cutover, the replication breaks due to network latency. What should the company do to complete the migration successfully?
medium- ✓ A.Perform a manual takeover to promote the AWS secondary to primary.
- B.Set up a new HSR connection with a different port.
- C.Increase the HSR timeout settings on the primary.
- D.Restart the initial synchronization from scratch.
Why A: The correct action is to perform a manual failover using HSR takeover, which will promote the AWS secondary to primary and allow the system to continue. Increasing timeout may not resolve underlying latency. Restarting replication will take time. Setting up a new replication is unnecessary.
Variation 2. A company is migrating an SAP HANA database using SAP HANA System Replication (HSR) to AWS. The target EC2 instance is in a different AWS Region than the source. The network latency between regions is high. What should the migration team configure to ensure successful replication?
medium- A.Set up a VPN connection to the target region
- B.Disable HSR preload on the target
- ✓ C.Use AWS Global Accelerator to route traffic over the AWS global network
- D.Increase the HSR timeout values significantly
Why C: A VPN connection adds overhead and latency over the internet, worsening replication issues. Option B is incorrect because disabling HSR preload reduces memory usage but does not address high latency; it may even increase recovery time. Option C is correct because AWS Global Accelerator uses the AWS global network to optimize routing, reducing latency impact for HSR replication. Option D is incorrect because increasing HSR timeout values only masks timeout symptoms without resolving the underlying latency problem.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PAS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PAS-C01 exam.