> 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?
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)
>
>
> ==rob
>
>>
>> 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/
>
>
> --
> Rob Latham
> Mathematics and Computer Science Division
> Argonne National Lab, IL USA
