Migration Overview
- Legacy System: On-prem SAP ECC 6.0
- Target: AWS (EC2, RDS, EKS)
- Data Volume: 12TB transactional data
Testing Focus Areas
Data Integrity Verification
Method:
- CRC32 checksums for all tables
- Sampling 0.1% records for full-field comparison
Performance Benchmarking
Results Comparison:
| Operation | On-Prem | AWS (c5.4xlarge) |
|---|---|---|
| PO Processing | 2.1s | 1.4s |
| Month-End Close | 4.2h | 2.8h |
Cutover Testing
graph TD
A[Non-Prod Migration] –> B[Parallel Run]B –> C[Finance Module Cutover]C –> D[Full Production Cutover]
Optimization Statistics
Lessons Learned
- Biggest Surprise: 30% higher than expected S3 costs due to API calls
- Critical Success Factor: Pre-migration index optimization
