Re: [Libmesh-users] output results of very huge mesh

[Bin L. <ken...@ho...>]

Hi Simone,
I will try VTK format. I have tried NemesisIO few days ago. It can output multiple files from each processor in parallel. However, when I tried to open these files with paraview, the paraview reports an error, saying "cannot find any mesh". Does it mean I need to write out mesh files in parallel as well? Do I need to serialize the mesh in this case?

Thanks
Ken

________________________________
From: Simone Rossi <sim...@gm...>
Sent: Saturday, January 26, 2019 12:17 AM
To: Bin Liu
Cc: lib...@li...
Subject: Re: [Libmesh-users] output results of very huge mesh

Hey Ken,
have you tried using VTK to export your solution? It exports a file per processor with only local information.
There may be other solutions available, but I’m using VTK to export the solution in parallel.
I hope it helps,
Simone

On Jan 25, 2019, at 2:09, Bin Liu <ken...@ho...> wrote:

> Hi,
> I have written a mpi finite element program to solve a very large 3D problem, around 50 millions nodes. I have been able to split the mesh and read these decomposed mesh from each processors. However, I have a big problem to output the results for visualization.
>
> From my understanding, I should Serialize the mesh temporarily and output the mesh and solutions together. However, this serialization of mesh is very inefficient on one processor and takes a huge amount of memory and time to generate it.
>
> Is there any way to write out the mesh and solutions together from each processor in parallel? It is not a problem for me to post-process them, as long as they are mesh and solution are exported.
>
> Thanks
> Ken
>
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