Grid Data Farm is a Petascale data-intensive computing project initiated in Japan. The project is collaboration among KEK (High Energy Accelerator Research Organization), ETL/TACC (Electrotechnical Laboratory / Tsukuba Advanced Computing Center), the University of Tokyo, and Tokyo Institute of Technology. The challenge will involve construction of a data processing framework that will handle 100Terabyte to Petabyte scale data emanated by the experiments of the Large Hadron Collider (LHC) Accelerator that will be built at CERN by 2005