Source. The name of the mapping source file.
Target name. The name of the target file.
Rows. The number of rows read for source and target. If the target is Hive, this is the only summary statistic available.
Average Rows/Sec. Average number of rows read per second for source and target.
Bytes. Number of bytes read for source and target.
Average Bytes/Sec. Average number of bytes read per second for source and target.
First Row Accessed. The date and time when the Data Integration Service started reading the first row in the source file.
Dropped rows. Number of source rows that the Data Integration Service did not read.