Hi Ann, You wrote: ... > The UCAR Software product netCDF is used for archiving model > output products and we are currently investigating ways to improve > the I/O throughput from netCDF to disk, where there are filesystems > with fixed yet differing cluster sizes. I would like to find out about > any similar work that may have already occured with the development > team at UCAR. Some work was done in the past on tuning netCDF I/O for FFIO on Crays, and the results are described in a section on Unicos optimization: http://www.unidata.ucar.edu/packages/netcdf/f90/Documentation/f90-html-docs/guide9.html#1005235 Some work has also been done on parallelizing netCDF for Cray T3E platforms: http://hpcf.nersc.gov/software/libs/io/netcdf/pusage.html We also have a plan for parallelizing netCDF I/O using MPI-I/O by layering the next version of netCDF on top of HDF: http://www.unidata.ucar.edu/proposals/NetCDFHDF/description.html but haven't yet identified resources to carry out this work. --Russ _____________________________________________________________________ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu