The old sequence: migrate the data, then verify it arrived correctly.

The problem is you have nothing to compare against. You’re validating the post-migration state against your memory of what it looked like before — which is not a standard, it’s a guess.

What actually works is establishing a baseline before migration starts. A snapshot of what exists, in what condition, and in what volume. Post-migration validation then becomes a comparison, not an impression. “Validation passed” stops meaning “everything looks good” and starts meaning “everything matches what we documented before we touched anything.”

That’s a different level of confidence. In environments where data integrity is a compliance requirement — not just an IT concern — that difference matters in ways that show up in audit trails, not just ticket queues.

How early in your migrations do you lock in the baseline — and have you ever had a post-migration dispute where not having one made things harder to resolve?

#Migration #DataValidation #CloudMigration