[Paraview] PNetCDF 64 bit Error

[Amir A]

So one of the reasons I have to use CDF-5 is that netcdf4 does not support large arrays (>2GiB), but CDF-5 does.So I have a question: Is it possible to break a large file into netcdf4 files and write a parent wrapper around it  and use that as input to paraview? What I mean is to write a pvti (or similar) parent file, that links smaller netcdf files together. Paraview recognizes netcdf4, so that should not be a problem.If this works, then the size limitation of netcdf would not be a problem and I can avoid going the CDF-5 route.
From: dave.demarle at kitware.com
Date: Mon, 6 Jul 2015 14:43:06 -0400
Subject: Re: [Paraview] PNetCDF 64 bit Error
To: u.utku.turuncoglu at be.itu.edu.tr
CC: amiramir12345 at outlook.com; paraview at paraview.org



distribution of ParaView. By the way, the NetCDF library used in the

ParaView reader could only support NetCDF classic as default and you might

need to install from source using NetCDF4 library.



ParaView has supported netcdf4 since 3.14. 3.14.0 only through our internal libnetcdf/hdf; 3.14.1 added it through external too.
However, I do not know if anyone has used the pnetcdf variant. You may be the first Amir.
Can anyone else on the list comment on the status of pnetcdf support in ParaView?
 

I hope it helps,

Regards,



--ufuk



> A small pnetcdf file is attached.

>

> The output of ncmpidump is the following:

> netcdf data_in {// file format: CDF-5 (big variables)dimensions:      x = 4 ; y

> = 4 ; z = 4 ;variables:       double data(x, y, z) ;

> // global attributes:         :CDF-5 mode = 1 ;data:

>  data =  -1.83667601732677e-48, -1.49975978266186e-32, 0,

> 1.49975978266186e-32,  -1.49975978266186e-32, -1.22464679914735e-16, 0,

> 1.22464679914735e-16,  0, 0, -0, -0,  1.49975978266186e-32,

> 1.22464679914735e-16, -0, -1.22464679914735e-16,  -1.49975978266186e-32,

> -1.22464679914735e-16, 0, 1.22464679914735e-16,  -1.22464679914735e-16,

> -1, 0, 1,  0, 0, -0, -0,  1.22464679914735e-16, 1, -0, -1,  0, 0, -0, -0,

>  0, 0, -0, -0,  -0, -0, 0, 0,  -0, -0, 0, 0,  1.49975978266186e-32,

> 1.22464679914735e-16, -0, -1.22464679914735e-16,  1.22464679914735e-16,

> 1, -0, -1,  -0, -0, 0, 0,  -1.22464679914735e-16, -1, 0, 1 ;}

>

>

> From: amiramir12345 at outlook.com

> To: paraview at paraview.org

> Subject: PNetCDF 64 bit Error

> Date: Sun, 5 Jul 2015 16:33:49 -0500

>

>

>

>

> I am getting an error when loading a NetCDF file that is written using

> CDF-5 mode using pnetcdf library. This is the error output:

>

>

> ERROR: In

> /home1/01249/gda/modules/paraview/ParaView-v4.3.1-source/VTK/Common/ExecutionModel/vtkExecutive.cxx,

> line 784vtkPVCompositeDataPipeline (0x2aaab6364390): Algorithm

> vtkVisItMFIXCDFReader(0x2aaab635b0e0) returned failure for request:

> vtkInformation (0x2aaab6263000)  Debug: Off  Modified Time: 885475

> Reference Count: 1  Registered Events: (none)  Request:

> REQUEST_DATA_OBJECT  ALGORITHM_AFTER_FORWARD: 1  FORWARD_DIRECTION: 0

>

>

> When I run ncmpidump on the data file it shows the following:

> netcdf data_in {// file format: CDF-5 (big variables)dimensions:      x =

> 1024; y = 1024 ;      z = 1024 ;variables:    double data(x, y, z) ;

> // global attributes:         :CDF-5 mode = 1 ;}

>

> There is no problem if I create the file using the classical mode for a

> smaller dimension (<2^32), and I can load it into paraview.However, for

> large problems I have to enable CDF-5.

>

> I am using paraview 4.3.1.

>

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