The application should switch from the source database to the target only after ongoing replication has caught up within the approved loss window. Which approach best fits?

1. Perform the initial copy, replicate changes, then use a planned final synchronization and cutover.
2. Assess engine features and application compatibility before selecting the migration path.
3. Validate row counts, checksums where suitable, and application-level reconciliation.
4. Check replication lag and execute the reviewed cutover procedure.