Every migration horror story starts the same way: "we'll do the switch over the weekend." Friday ...Every migration horror story starts the same way: "we'll do the switch over the weekend." Friday ...
The network for creativity
Join 1.25M professional creatives like you
Connect with clients, get discovered, and run your business 100% commission-free
Creatives on Contra have earned over $150M and we are just getting started
Every migration horror story starts the same way: "we'll do the switch over the weekend."
Friday night, freeze the old system, run the export, run the import, point everything at the new database, go home. Monday morning you find out something didn't come across, and by then you have two days of new data on top of it.
The alternative takes longer and is far less exciting, which is the point.
Run both systems on real traffic first. The old stack keeps serving users exactly as it does today. The new one receives the same writes in parallel and serves nobody. Nothing depends on it, so it can be wrong without hurting anybody.
Then compare. Row by row, on real production data, not a sample. Every mismatch is a bug — a type that didn't translate, a constraint that behaves differently, a timezone assumption nobody documented. You find those on a Tuesday afternoon with the old system still running, instead of at 2am with users locked out.
Only then move people across. One region at a time, in my case. Each with a rollback path that had actually been tested rather than written down.
We moved 12 countries this way. Zero data loss — not because the migration was clever, but because by the time we switched, we already knew exactly what the new system would do.
If your cutover plan is dramatic, that's not confidence. It's a plan with no verification step in it.
Anyone here done a big migration recently? Curious whether you dual-ran it or took the weekend approach.
Post image
Back to feed
The network for creativity
Join 1.25M professional creatives like you
Connect with clients, get discovered, and run your business 100% commission-free
Creatives on Contra have earned over $150M and we are just getting started