Delta load fail from dso to dso

Hi Folks ,

Delta load is failed from DSO1 to DSO2 . But the user made the DSO1 request as GREEN. How can i find the missing delta records and load them ?

I need to know 2 points .

1) There is huge number of records. how can i find the missing records

2) How can i load the failed delta request from DSO1. I cannot delete data in DSO1 and do a  full load or anything like that..need only DSO1-->DSO2.