A database migration must keep the source running during most of the transfer and minimize the final outage. Which pattern is appropriate for a supported source and target?

1. Take one export months before cutover and ignore subsequent source writes.
2. Use DMS full load plus change data capture, then validate and perform a controlled write cutover.
3. Assume DMS automatically rewrites every application SQL query for any target engine.
4. Allow independent source and target writes without reconciliation.