The computing requirements for ALICE experiment are huge and the experiment has adopted the technology of “distributed computing over internet”, popularly known as GRID Computing, as the solution.The ALICE GRID is organized on a Tier-structure called MONARC Architecture, with the highest level at Tier-0 being kept at CERN and essentially acting as the depository for raw data. Down the line there are 11 Tier-1 centres around the globe and more than 100 Tier-2 centres.