Database Migration Guide

For a high-traffic app, "turning it off" for 4 hours costs millions in revenue and causes massive customer anger.

This is a full story about —a high-stakes, technical, and often terrifying saga that every growing tech company eventually faces. database migration

You must map every dependency—every table, view, and stored procedure. For a high-traffic app, "turning it off" for

Early attempts to move often look like a "Big Bang" approach. You turn off the application, copy the database, and turn it on in the new location. For a high-traffic app

The application is updated to write data to both the old and new databases simultaneously. This keeps the new system "warm" and up-to-date.