Procedure for BI System copy (ABAP+JAVA) what is the best ?

Hello to all !

First time is my that work with BI.

In my company desired to refresh the data of production of BI, in the system test de BI.

The instance is Abap + Java. The database is too large.

I have a question which is the best procedure to refresh my system of Quality of BI with the data of BI production?

I appreciate the help me.

Thanks a lot.

Desiré