Hello Venkatesh Veera,
As per the LSA Architecture, Write-Optimised DSO is used to store data from PSA.
IF you are writing some routines in Transformation between DS -> Standard DSO, then instead of doing this, for good practise , Create Flow like this : DS -> WDSO ->SDSO.
So that if you are writing or changing your routine then you dont need to fetch all data from source system. you can load data from WDSO to SDSO.
And for DS -> WDSO, you can create fake delta concept (Write code in Selection of Infopackages).
Thanks
Pratyaksh Jeet