[petsc-users] viewers and nohup (unrelated questions)

[Matthew Knepley]

On Fri, Sep 16, 2011 at 7:17 AM, Gianluca Meneghello <gianmail at gmail.com>wrote:

> Hi,
>
> I would like to ask you 2 unrelated questions.
>
> #_1 The first one concerns PETSc viewer. In my code I'm writing
> outputs with PETSC_VIEWER_ASCII_VTK, more precisely
>
>    PetscViewer viewer;
>    PetscViewerASCIIOpen(PETSC_COMM_SELF,filename.c_str(),&viewer);
>    PetscViewerSetFormat(viewer,PETSC_VIEWER_ASCII_VTK);
>    DMView(dau,viewer);
>    VecView(foou,viewer);
>    VecView(foop,viewer);
>    PetscViewerDestroy(&viewer);
>
> where foou and foop (velocity and pressure respectively) are vectors
> extracted from the vector containing the full solution of my problem.
> The VTK so obtained nicely contains a vector field — from foou — and a
> scalar field — foop — and can be read by Paraview.
>
> Nonetheless, I guess writing (and reading from Paraview) ASCII files
> is not the best choice. Are there better possibilities in PETSc? Is
> there a PETSC_VIEWER_BINARY_VTK or equivalent?
>

We are working on it but it is not yet ready.


> #_2 The second is about the nohup command. If I run my code with
> "nohup ./main <opts> &" and then exit the console, the program dies as
> if there was no nohup command in front of it. The same is true for
> some examples I've tested from the PETSc library. I guess this is
> related to the machine I'm using more than to the library but... has
> anyone of you already experienced a similar issue? Any advice is
> welcome and please let me know if you need any information that can
> help.
>

Dos your program die from a HUP signal or another one?

  Thanks,

     Matt


> Thanks
>
> Gianluca
>
> --
> "[Je pense que] l'homme est un monde qui vaut des fois les mondes et
> que les plus ardentes ambitions sont celles qui ont eu l'orgueil de
> l'Anonymat" -- Non omnibus, sed mihi et tibi
> Amedeo Modigliani
>



-- 
What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
lead.
-- Norbert Wiener
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