Verify data consistency before cutover
sharding & workflows
// what it does
Runs a row-by-row consistency check (VDiff) between source and target keyspaces for the workflow — the proof that the copy is faithful before you route real traffic at it.
// shell
$ pscale workflow verify-data mydb main 1// gotcha
Run it before switch-traffic and again before cutover; it's the cheapest insurance in the whole migration. A verify failure means investigate, not proceed-anyway.