The correct strategy is to deploy a Pacemaker cluster with two EC2 instances across Availability Zones using a shared file system. This approach is essential because SAP Central Services (ASCS) manages the critical Enqueue and Message Server processes, which require cluster-based fencing, resource monitoring, and automated failover to maintain session state and lock integrity. A Pacemaker cluster across AZs, paired with a shared file system like Amazon EFS or a replicated solution, ensures that if the primary instance fails, the secondary can take over with minimal downtime, directly meeting the high availability requirement. On the AWS Certified SAP on Specialty PAS-C01 exam, this question tests your understanding that ASCS high availability cannot rely on simple multi-AZ deployment alone—it needs a cluster manager to handle the enqueue replication and STONITH fencing. A common trap is choosing a single-instance multi-AZ setup without clustering, which fails to protect the enqueue service. Memory tip: ASCS needs a “pacemaker heartbeat” across AZs, not just a static standby.
PAS-C01 Design of SAP Workloads on AWS Practice Question
This PAS-C01 practice question tests your understanding of design of sap workloads on aws. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company is implementing an SAP S/4HANA system on AWS. The system must be highly available across multiple Availability Zones. Which of the following strategies should the company implement for the SAP Central Services (ASCS) instance to meet high availability requirements?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deploy a Pacemaker cluster with two EC2 instances across Availability Zones using a shared file system.
Option C is correct because SAP Central Services (ASCS) requires a highly available cluster that can manage the Enqueue and Message Server processes. A Pacemaker cluster across two Availability Zones, using a shared file system (e.g., Amazon EFS or a replicated file system), provides the necessary fencing, resource monitoring, and failover for ASCS. This architecture ensures that if the primary ASCS instance fails, the secondary instance in the other AZ can take over with minimal downtime, meeting the high availability requirement.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 a single EC2 instance with a large instance type to handle failover.
Why it's wrong here
A single instance is a single point of failure.
✗
Configure SAP HANA System Replication between two Availability Zones.
Why it's wrong here
HANA System Replication is for the database, not ASCS.
✓
Deploy a Pacemaker cluster with two EC2 instances across Availability Zones using a shared file system.
Why this is correct
Pacemaker cluster ensures automatic failover for ASCS.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use Amazon RDS for SAP Central Services with Multi-AZ deployment.
Why it's wrong here
RDS does not support SAP Central Services.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse SAP HANA System Replication (Option B) as a solution for all SAP high availability needs, but it only applies to the database layer, not to the ASCS application services.
Detailed technical explanation
How to think about this question
The Pacemaker cluster for ASCS typically uses the `ocf::heartbeat:Filesystem` resource agent to mount a shared file system (e.g., Amazon EFS or a DRBD-replicated volume) that stores the SAP transport directory and global profile. The cluster also manages the `SAPInstance` resource agent, which controls the start/stop/monitor of the ASCS instance. In a multi-AZ setup, the cluster uses STONITH (Shoot The Other Node In The Head) fencing, often via AWS API calls, to ensure that a failed node is forcibly terminated before the secondary takes over, preventing split-brain scenarios.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Design of SAP Workloads on AWS — This question tests Design of SAP Workloads on AWS — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Deploy a Pacemaker cluster with two EC2 instances across Availability Zones using a shared file system. — Option C is correct because SAP Central Services (ASCS) requires a highly available cluster that can manage the Enqueue and Message Server processes. A Pacemaker cluster across two Availability Zones, using a shared file system (e.g., Amazon EFS or a replicated file system), provides the necessary fencing, resource monitoring, and failover for ASCS. This architecture ensures that if the primary ASCS instance fails, the secondary instance in the other AZ can take over with minimal downtime, meeting the high availability requirement.
What should I do if I get this PAS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Variation 1. A company is designing an SAP S/4HANA workload on AWS. The system must be highly available within a single AWS Region. Which architecture ensures automatic failover for the SAP Central Services (ASCS) instance?
medium
A.Place an Application Load Balancer (ALB) in front of two ASCS instances in different Availability Zones.
B.Deploy ASCS on a single EC2 instance with multiple Elastic Network Interfaces (ENIs).
C.Use Amazon CloudFront to distribute traffic to multiple ASCS instances in different Availability Zones.
✓ D.Configure Amazon Route 53 with health checks to failover to a secondary ASCS instance in a different Availability Zone.
Why D: Option D is correct because Amazon Route 53 with health checks can monitor the primary ASCS instance and automatically fail over DNS resolution to a secondary ASCS instance in a different Availability Zone. This provides the necessary automatic failover for SAP Central Services (ASCS) without requiring a shared filesystem or cluster manager, as Route 53 health checks detect instance or service failure and update DNS records accordingly.
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Question Discussion
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