Tableau real-time reporting on Tableau Server

I have my tableau dashboard created, by live connection to Teradata Warehouse. So I want to publish it on server for real time reporting. In order to schedule update on tableau server, I need to create an extract on my tableau desktop. With live mode connection, there is no option to schedule update on tableau server. So for this, I need to update my tableau desktop on extract mode right before the online schedule is taken place. So, how I can do this refreshing extract on my desktop? The all purpose is that I create a real-time reporting from Teradata to Tableau desktop to Tableau server. Please give me your full solution. The price for full functioning advice is $20. Thanks