For mission-critical SAP workloads, deploying across multiple AWS Regions ensures high availability (HA), disaster recovery (DR), and business continuity. By separating workloads geographically, organizations reduce the risk of service disruption due to regional outages while maintaining consistent operational and security controls.
This design leverages primary and secondary regions for active workloads and DR replication while maintaining network isolation, replication consistency, and failover readiness.
Objective:
Define the AWS Regions for hosting the SAP landscape to achieve:
Define the AWS Regions for hosting the SAP landscape to achieve:
- High Availability: Primary region handles active workloads.
- Disaster Recovery: Secondary region maintains replicated SAP workloads.
- Operational Consistency: VPCs, subnets, and shared services are replicated for seamless failover.
- Compliance & Business Continuity: Cross-region backup and replication using AWS-native services.
| Region Type | Region Name & Code | Purpose |
|---|---|---|
| Primary Region | Singapore (ap-southeast-1) | Hosts active SAP workloads |
| Secondary Region | Tokyo (ap-northeast-1) | DR region for business continuity; replicates SAP workloads |
Key Principles:
- Regions are geographically isolated to minimize outage impact.
- All VPCs, subnets, and shared services are mirrored between primary and secondary regions.
- SAP HANA and EC2 instances are replicated using AWS Elastic Disaster Recovery (EDR) and Backint for HANA.
Technical Steps to Implement Multi-Region SAP Landscape
Step 1: Configure AWS Regions
Log in to AWS Management Console with the Master Payer Account (MPA) or appropriate environment account.
Select Primary Region (Production):
ap-southeast-1 (Singapore) for production workloads.
Select DR/Secondary Region:
ap-northeast-1 (Tokyo) for disaster recovery and backup.
Enable necessary services in both regions:
- VPC
- IAM
- S3
- AWS Elastic Disaster Recovery (EDR)
- CloudTrail, CloudWatch, Route53
Step 2: Deploy Core Infrastructure in Both Regions
VPC Replication per Account
- Create VPCs in Tokyo with the same design as Singapore (public/private subnets).
- Ensure non-overlapping CIDRs for both regions, especially if using Direct Connect or VPN.
Shared Services Deployment
- Deploy critical shared services in both regions:
- Active Directory (AD)
- DNS (Route53 private hosted zones)
- Monitoring (CloudWatch, CloudTrail, Security Hub)
Transit Gateway Deployment
- Deploy Transit Gateway in Network Service Account.
- Connect all workload accounts in both regions.
- Configure route tables to ensure traffic isolation and cross-account connectivity.
Step 3: Enable Disaster Recovery
EC2 / SAP Workload Replication
- Use AWS Elastic Disaster Recovery (EDR) to replicate EC2 instances from Singapore → Tokyo.
- Configure continuous replication for near real-time DR.
SAP HANA Database Replication
- Use AWS Backint or native SAP HANA tools for asynchronous replication.
- Ensure DR site has sufficient compute and storage capacity for SAP workloads.
DR Testing
- Periodically perform failover drills to validate recovery procedures.
- Test SAP application, database, and networking failover workflows.
Step 4: Route53 DNS Failover
Configure Health Checks
Set up Route53 health checks for primary production endpoints.
Set Traffic Routing
Default traffic → Primary region (Singapore).
Failover traffic → Secondary region (Tokyo) on health check failure.
Failover Automation
Verify that Route53 automatically switches endpoints during simulated outages.
Step 5: Cross-Region Backup
AWS Backup Configuration
Enable cross-region backup for EBS, RDS, S3, and other critical resources.
Store snapshots in both Singapore and Tokyo regions.
Encryption
Use KMS keys per region for backup encryption.
Backup Scheduling
Define schedules according to SAP RPO/RTO requirements.
Ensure compliance with internal and regulatory policies.
Diagram – Multi-Region Architecture
Primary Region – Singapore (ap-southeast-1):
Prod Account: Live SAP workloads
Dev Account: Development & experimentation
QA Account: Testing & validation
Network Services:
Transit Gateway connecting all primary workloads
Centralized VPC, routing, and security controls
Shared Services / Security / Logging:
CI/CD, identity services, audit logging, security monitoring
Secondary Region – Tokyo (ap-northeast-1):
Disaster Recovery (DR) SAP workloads
Continuous replication from primary region using EDR / SAP replication
Notes and Best Practices
- Maintain consistent VPC and subnet CIDR strategy across regions.
- Regularly test DR failover scenarios to ensure operational readiness.
- Use Cross-Region replication and encrypted backups to meet compliance and RTO/RPO requirements.
- Multi-region deployment ensures resilience, business continuity, and high availability for SAP workloads.
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