Delta failure

Question

HI all,
When Delta load occures from DSO to CUBE load was failed.In this issue we need  to make the request  to Red and delete the request from the cube. Then need to delete the Datamart status in the DSO.
My Question is, why we need to make the request red  and delete first and then go for Datamart Staus.What happen if we do viceversa.
Can any one give suitable answer.
Regards,
Bunny

Answer 1

Hi Pranav,
The reason why we turn the bad request red and then delete the request prior to the deletion of data mart is as follows:
1) If we turn the request red then we are sending the message to the source system that the last delta was not correct and the records need to be extracted again.
2) The delta queue keeps the last delta records only till the next delta run goes green.
If we don't turn the request red and in case of a green request being deleted accidentally or due to some other reason, then we stand a chance of data loss from the source system. Hence as a precaution we always turn a request that needs to be re extracted to red and then delete the request.
We cannot delete the data mart status if the request still exists in the data target(s). The system will not allow you to delete the data mart directly, it will say data already exists in the target(s).
Hope this clarifies your doubts related to deltas.
Regards,
Manoj