Can you migrate a 60TB+ SAP landscape to the cloud with zero business disruption?
Yes. Here is how we did it - and what every ICT and enterprise architecture professional should know before attempting migrations at this scale.
Having led large-scale SAP S/4HANA and Business Suite migrations to AWS, Azure, and GCP for global enterprises achieving 99.9% system availability throughout, these are the principles that made the difference:
1️⃣ Architecture Before Everything Never begin with tools or timelines. Begin with your North Star Architecture. Use SAP LeanIX and Signavio to map your current landscape, define your target state, and surface every dependency - before a single workload moves.
2️⃣ High Availability is a Design Requirement, Not an Option At 24TB+ system scale, Pacemaker clustering, cross-region replication, and automated fail over are not optional extras. They are non-negotiable design fundamentals that must be architect from day one.
3️⃣ Zero-Disruption is a Strategy, Not a Slogan Phased cut over planning, parallel run periods, real-time monitoring during go-live, and pre-tested rollback procedures are what separate successful migrations from costly failures. Every contingency must be planned and rehearsed.
4️⃣ Governance Frameworks Drive Post-Migration Success Operational governance frameworks established before migration - run books, SLA structures, escalation paths, incident playbooks — reduce critical incidents by 20–25% in the months following go-live. Build these before you migrate, not after.
5️⃣ People and Stakeholders Matter as Much as Technology C-suite alignment, cross-functional collaboration across infrastructure, application, and business teams, and clear communication at every stage are as critical as any technical decision.
The result for our customers: 
99.99% system availability maintained throughout Infrastructure cost reductions of 25–30% System performance improvements of 30%+ post-migration Zero business disruption across go-live events
What cloud migration challenges are IET members currently navigating? I'd welcome the discussion. 
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