RFC and Webservice which one i should use and why?

Hi,
I have to write a extractor program in BI which would be fetching a huge data from CRM.
I have two options to achieve this targer.
1-> Create a RFC which will give me all the data
2-> Create a Webservice in CRM and use it in BI
Please advice me , which way i should go and advantage of that way.
Regards
PG

Hi,
If amount of data is huge then it is recomnded to use RFC because of its speed and reliability. Webservice not yet proven good for extracting and handling very large chunk of data.
Regards,
Gourav Khare

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