Hi Nico,
The file was written using pnetcdf so you need to use pnetcdf to read it.
It is a very different format then netcdf4/hdf5 parallel.
You can probably write a quick program on machine 1 to translate the file.
On Wed, Feb 4, 2015 at 2:28 PM, Nico Schlömer <nico.schloemer@xxxxxxxxx>
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?
>
> Cheers,
> 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 == 32768
> >
> >
> > 32768 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.
> >
> > ==rob
> >
> >
> >>
> >> Cheers,
> >> 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/
>
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>
--
Jim Edwards
CESM Software Engineer
National Center for Atmospheric Research
Boulder, CO
