What’s the data flow engine?
The Data Flow Engine in SSIS is responsible for managing the data flow tasks within a package. The main reason behind this is that the job is specialized to move data between different sources, destinations, and it can contain additional components.
Note: SSIS is actually an upgrade of the Data Transformation Services (DTS), an old data transformation software solution that was included with the SQL Server. Have a look at some of the ssis interview questions for experienced to get an in-depth view of this efficient tool.