When you configure a session to write to a file target, you can write the target output to a separate file for each partition or to a merge file that contains the target output for all partitions. When you run the session, the Integration Service writes to the individual output files or to the merge file concurrently. You can also send the data for a single partition or for all target partitions to an operating system command.
You can configure connection settings and file properties for each target partition. You configure these settings in the Transformations view on the Mapping tab. You can also configure the session to use partitioned FTP file targets.