Li Tao, > OK,Thanks‘very much for your opinions.I think cdf-5 may be the answer! Good, but please be aware that parallel-netcdf CDF-5 format is new and not supported by Unidata netCDF software at this point, because it requires a 64-bit platform. So users with 32-bit platforms will not be able to read data in this format, as far as I understand. That's OK if you only intend for this data to be accessed on 64-bit platforms and don't need any of the other software that depends on Unidata netCDF software ... --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: RSV-429054 Department: Support netCDF Priority: Normal Status: Closed