On the Reporting data mart page, you can manually start the ETL process independent of any job schedules. The ETL process extracts any changes or new records from the database, transforms them to meet your requirements, and loads them in the data mart.
The ETL process also updates the OLAP cube with the most recent data from the data mart. When you run the ETL process, it updates the data mart and then loads the data into the OLAP cube.
Under Refresh data, click Start ETL refresh. The the ETL refresh status page appears, and the process updates the data mart with data that was added or modified in the source database since the last ETL refresh.
For more information about the ETL refresh, see Refresh ETL Process.