Case Study
The vision for the transition weekend was simple: execute a script, flow the data from MySQL 5.7 to PostgreSQL, sunset the old Java API, and spin up the new FastAPI layer. On Monday morning, staff would log in to the same UI, entirely unaware that the engine beneath them had been radically upgraded.
But to guarantee this, I needed to test the data migration locally using a recent production backup.
How do you cleanly translate millions of rows across fundamentally different database engines with zero data loss?
What's the call?