[netCDF #WMS-569611]: Parallel NetCDF and MPI

Hello Andrea,

Thank you for writing to us, and my apologies for the delayed response; I have 
been out of the office.  The netCDF-CXX4 API was contributed to us by a third 
party, as a replacement for the old API, and you are correct that the 
constructor for parallel I/O (enhanced model) appears to have gone missing.  I 
will fix this for the upcoming release of the C++ API.  In the meantime, you 
could use the C api, or an older version of the C++ API.  

My apologies for not having a better answer, but you are the first person to 
point this out! I will correct this ASAP.

-Ward



> Full Name: Andrea Laruelo
> Email Address: address@hidden
> Organization: Magellium
> Package Version: 4.3.0
> Operating System: Linux
> Hardware:
> Description of problem:
> 
> Dear NetCDF Support Team,
> 
> I am currently working in the development of a C++ library that uses
> NetCDF-4 files (enhanced model) to store scientific data. We are using
> NetCDF-4 C++ version 4.3.0.  We have started to think about using parallel
> access to the NetCDF-4 files.  We cannot use PnetCDF due to the use of
> the enhanced NetCDF4 model (if I understood correctly, only the classic
> model is supported).  Diving in the available online documentation, I
> found that the class NcFile used to have a constructor to open a NetCDF
> file for parallel MPI I/O. This can be seen in the link below:
> 
> http://www.nrel.colostate.edu/projects/irc/public/Documents/Software/netCDF/cpp4/html/classnetcdf_1_1NcFile.html
> 
> There is also an example (named Test_Parallel.cpp) that shows how to
> use parallel NetCDF4 I/O using this constructor.
> 
> Unfortunately (at least for me), I have realized that this constructor
> is not available in NetCDF4-C++ 4.3.  Could you please tell me if there
> is a workaround or another way to use MPI within NetCDF-C++?
> 
> Thank you very much for your help.
> 
> Greetings from Toulouse,
> Andrea
> 
> 
> 


Ticket Details
===================
Ticket ID: WMS-569611
Department: Support netCDF
Priority: Normal
Status: Closed
===================
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