Moving TM1 to the Cloud: What Breaks, What Dies, and How to Cut Over Without Downtime 📋 Executive Checklist: What This Playbook Covers ✔ What Dies: Monolith tm1s.exe single-process write locks and 32-bit Perspectives retirement. ✔ What Breaks: Silent ExecuteCommand OS shell failures in secure Linux/OpenShift containers. ✔ The Feeder Cloud Tax: Why cloud memory compute does not forgive unoptimized rule overfeeding. ✔ Zero-Downtime Cutover: The 5-stage shadow dual-write pipeline feeding on-premise and cloud in parallel. ✔ Data Reconciliation Standard: Cell-by-cell parity validation down to ...