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On 02/04/2015 03:45 PM, Nico Schlömer wrote:
As Jim says, if you've created a "classic format" netcdf file, you have two options: - read it serially - convert it to "new format" (really HDF5)I've used VTK's infamous vtkExodusIIWriter [1], so frankly I wasn't really sure what format it spits out. Are there conversion scripts out in the wild?
looks like nccopy can do it: https://www.unidata.ucar.edu/software/netcdf/docs/netcdf/nccopy.html nccopy -k enhanced input.nc output.nc ==rob
Cheers, Nico [1] http://www.vtk.org/doc/nightly/html/classvtkExodusIIWriter.html On Wed, Feb 4, 2015 at 11:43 PM, Rob Latham <robl@xxxxxxxxxxx> wrote:On 02/04/2015 03:28 PM, Nico Schlömer wrote:No, that's all legal, if unusual -- I am glad to see you are exercising the "Argonne/Northwestern parallel netcdf" driver feature of NetCDF-4.Oh wait, you mean pnetcdf (as opposed to Parallel I/O?). The configuration [1] on the machine which claims the file is not netCDF is ``` Configuration Summary: -- Building Shared Libraries: ON -- Building netCDF-4: ON -- Building DAP Support: ON -- Building Utilities: ON Building Parallel NetCDF -- Using pnetcdf: OFF -- Using Parallel IO: ON ``` I actually do *not* want pnetcdf for reading, I would like to use the Parallel IO feature built into netCDF itself. What option would I have to set for this?As Jim says, if you've created a "classic format" netcdf file, you have two options: - read it serially - convert it to "new format" (really HDF5) ==robCheers, Nico [1] https://launchpadlibrarian.net/196524671/buildlog_ubuntu-utopic-amd64.netcdf_1%3A4.3.3~20150204-utopic1_UPLOADING.txt.gz On Wed, Feb 4, 2015 at 11:09 PM, Rob Latham <robl@xxxxxxxxxxx> wrote:On 02/04/2015 02:45 PM, Nico Schlömer wrote:What's the value of the mode argument you are passing to nc_open_par(const char *path, int mode, MPI_Comm comm, MPI_Info info, int *ncidp);The call is from [1] with ``` NC_NOWRITE == 0 NC_SHARE == 2048 pariomode == 3276832768 is 0x8000 or NC_PNETCDF``` so eventually the mode argument is ``` NC_NOWRITE|NC_SHARE|pariomode == 34816 ``` Looks suspicious?No, that's all legal, if unusual -- I am glad to see you are exercising the "Argonne/Northwestern parallel netcdf" driver feature of NetCDF-4. These flags will create a classic netcdf file. Why would such a file be unreadable on another system? Well, if the other system is also requesting NC_PNETCDF, it's possible the Unidata-NetCDF library was not built with pnetcdf support, though nc_open_par should just detect the format. ==robCheers, Nico [1] https://github.com/trilinos/trilinos/blob/master/packages/seacas/libraries/exodus/cbind/src/ex_open_par.c#L180 On Wed, Feb 4, 2015 at 6:00 PM, Russ Rew <russ@xxxxxxxxxxxxxxxx> wrote:Hi Nico, What's the value of the mode argument you are passing to nc_open_par(const char *path, int mode, MPI_Comm comm, MPI_Info info, int *ncidp); ? --Russ On Tue, Feb 3, 2015 at 3:25 PM, Nico Schlömer <nico.schloemer@xxxxxxxxx> wrote:Hi all, I'm trying to read the file ``` http://win.ua.ac.be/~nschloe/other/pacman.e ``` in parallel with `nc_open_par` [1]. This works on one machine, but returns the error code `-51` ("Not a netCDF file") on another. Could someone clarify this? Cheers, Nico [1] https://github.com/Unidata/netcdf-c/blob/master/libdispatch/dparallel.c#L38 _______________________________________________ netcdfgroup mailing list netcdfgroup@xxxxxxxxxxxxxxxx For list information or to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/_______________________________________________ netcdfgroup mailing list netcdfgroup@xxxxxxxxxxxxxxxx For list information or to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/-- Rob Latham Mathematics and Computer Science Division Argonne National Lab, IL USA _______________________________________________ netcdfgroup mailing list netcdfgroup@xxxxxxxxxxxxxxxx For list information or to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/-- Rob Latham Mathematics and Computer Science Division Argonne National Lab, IL USA
-- Rob Latham Mathematics and Computer Science Division Argonne National Lab, IL USA
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