Sales Order Upload for more then 5000+ line items for single sales order create

Hi All,

I have a scenario where I have to upload 5000+ items for single sales order,

I am using BAPI_SALESORDER_CREATEFROMDAT2 where it is taking too much time to upload (more then 10 hrs for 5000 items / more then 4 hrs for 2000 line items to create single sales order) ,I have tried foreground and background both ways , But system is getting time out runtime error or running for hrs and hrs.

Please suggest me how to approach with this or any strategy i can apply for it?

Regards,

Ruchi