You can run a small data extract to provide the system with base data for estimating the effect of compression on the size of the extract file, and for estimating the time it would take to run a complete extraction.

Enable extractions of a small subset of data:

1. From the main DART menu, choose Configuration ® Data extracts.
2. Choose Technical Settings
3. Set the Enable test run with limited data volume indicator.

The system uses the log of the extraction execution as a base for future estimates. You may wish to discard the resulting extract, as it serves no other purpose.