Include one MD info objects in the Cube

Hi,

I need to include one MD info objects in the Cube and underlying DSO which is in 3x flow for reporting in BEx query for Finance appln.

As of now i have 40+ million records in cube.We are having daily delta load and daily reporting.

If any body came across this type of situation.Pls share the experience and best practice for developing and the deleting the data and loading the data.

If we delete the whole data what will be the best practice to load again . What about DSO data..

Regards