PI File pick during SAP as sender

Dear Friends,

I would like to know the behaviour of PI sender file adapter.  Consider SAP ECC is creating the file in AL11.

The polling in PI is every 5 sec.

Concern:

In the ECC, as soon as OPEN DATASET statement is used the file gets created in AL11. If there are more entries to write exceeding 5 sec suppose 30 sec for TRANSFER statement,   while the application program is still writing,  PI would have already transferred the file .

Could you please suggest how to tackle this scenario.

Thanks in advance.

Regards,

Joshi