Grid Architecture for ALICE Experiment

According to the requirement of the Physics Data Challenge and many years of experiences from the actual operations, we propose the Grid Architecture for the ALICE Experiment. This architecture builds on AliEn2 framework and AliEn2 is the grid framework for the whole system´s management and also provides the client interface for accessing the ALICE Grid platform. On the base of AliEn2, we adopt some middlewares to make the platform more flexible, availability and efficiency. At the end, the whole system has been worldwide deployed at around 88 sites for distributed production of raw data and Monte Carlo data, detector simulation, reconstruction and real data analysis. We observe the activities of the platform from different point of view and report the performance of the whole ALICE grid platform since the LHC first physics data 2010, 03-20.