PAS-C01 SAP HANA System Replication (HSR) Practice Question
A company is running a critical SAP application on SAP HANA in an AWS Single-AZ deployment. The application has experienced downtime twice in the last month due to underlying hardware failures. What is the MOST cost-effective solution to minimize future downtime without compromising performance?
⚠ Common exam trap
Watch out — candidates often confuse AWS RDS Multi-AZ with SAP HANA's HA approach. SAP HANA uses its own System Replication (HSR) across AZs, not a managed AWS service like Multi-AZ DB instance. The key is understanding that AWS provides infrastructure for HSR, but the replication is managed by SAP HANA itself.
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 SAP HANA database in a Multi-AZ configuration using SAP HANA System Replication (HSR) across Availability Zones.
Deploying SAP HANA in a Multi-AZ configuration using SAP HANA System Replication (HSR) across Availability Zones provides synchronous replication and automatic failover in case of hardware failure. This minimizes downtime without requiring a larger instance or manual intervention, and maintains performance by using the same instance type and storage configuration as the primary.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Move the SAP HANA instance to a larger instance type to improve hardware reliability.
Why it's wrong here
Larger instances do not mitigate AZ-level failures.
- ✓
Deploy the SAP HANA database in a Multi-AZ configuration using SAP HANA System Replication (HSR) across Availability Zones.
Why this is correct
Deploy the SAP HANA database in a Multi-AZ configuration using SAP HANA System Replication (HSR) across Availability Zones, providing automatic failover without downtime.
- ✗
Use Dedicated Hosts to ensure physical isolation from other AWS customers.
Why it's wrong here
Dedicated Hosts still operate within a single AZ.
- ✗
Implement automated snapshots of the SAP HANA data volume and restore in case of failure.
Why it's wrong here
Snapshot restore has longer RTO compared to Multi-AZ automatic failover.
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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