Hi Marouan,
in it's current implementation SAP HANA is not duplicating data over various storage engines.
You could either store data in the row- or in the column store.
You can migrate data between those two and you can query data from both storage types in one query, but the data itself is always stored just once.
If and how an approach similar to the one described in the paper you referenced will be implemented is not disclosed.
- Lars
