Migrazzjonijiet kbar, database ġdid, framework ġdid, platform ġdid, huma riskju għoli minħabba li jattiċċaw kollox u ma jagħtu ebda valur viżibli lill-utent sakemm ma jkunux ħammu. L-approċċ sikur hu inkrementali u revettibbli, qatt mhux cutover big-bang. Int migrazzjonajt f'slajċċez li tista' tivvalida u rollback.
Għaliex hu importanti
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1. Know WHY — a migration with no clear payoff isn't worth the risk.
2. Migrate INCREMENTALLY — never flip everything at once.
3. Run OLD and NEW in parallel — strangler-fig pattern.
4. Use feature flags / DUAL WRITES to shift traffic gradually.
5. VERIFY continuously — compare old vs. new outputs (shadow traffic).
6. Keep a ROLLBACK path at every step.
7. Clean up the old system only AFTER the new one is proven.