[petsc-users] vtk output ASCII or binary

[Xiangdong]

If I use VecView and write the vector into vtk file, is this done in
parallel or serial? Does  each processor send the data to processor 0 and
let it write to the disk?

Is it possible to let each processor write its own portion and merge them
together later?

Thank you.

Xiangdong


On Tue, Mar 4, 2014 at 2:06 PM, Matthew Knepley <knepley at gmail.com> wrote:

> On Tue, Mar 4, 2014 at 12:58 PM, Xiangdong <epscodes at gmail.com> wrote:
>
>> Thanks, Matt.
>>
>> Given that the FILE_MODE_APPEND is not supported for VTK format, is it
>> possible to write two vectors into the same VTK data file?
>>
>
> Yes, just call VecView() twice.
>
>    Matt
>
>
>> Thank you.
>>
>> Xiangdong
>>
>>
>> On Tue, Mar 4, 2014 at 1:52 PM, Matthew Knepley <knepley at gmail.com>wrote:
>>
>>> On Tue, Mar 4, 2014 at 12:31 PM, Xiangdong <epscodes at gmail.com> wrote:
>>>
>>>> What is the difference between PetscViewerSetType and
>>>> PetscViewerSetFormat? It seems that the first one take argument like
>>>> PETSCVIEWERVTK, while the second one takes PETSC_VIEWER_VTK_VTS.
>>>>
>>>
>>> A viewer type is the object type, just like other PETSc object, e.g.
>>> KSP. The format is a particular version
>>> of that output. For example, ASCII viewer is a type, whereas Matlab is a
>>> format.
>>>
>>>
>>>> By the way, how can I find a full list of formats? Clearly,
>>>> PETSC_VIEWER_VTK_VTS is not listed in online documentation for
>>>> PetscViewerSetFormat
>>>>
>>>> http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Viewer/PetscViewerSetFormat.html
>>>>
>>>
>>> It is listed in the complete list:
>>>
>>>
>>> http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/Viewer/PetscViewerFormat.html
>>>
>>>     Matt
>>>
>>>
>>>>  Thank you.
>>>>
>>>> Xiangdong
>>>>
>>>>
>>>> On Tue, Mar 4, 2014 at 1:02 PM, Matthew Knepley <knepley at gmail.com>wrote:
>>>>
>>>>> On Tue, Mar 4, 2014 at 11:44 AM, Xiangdong <epscodes at gmail.com> wrote:
>>>>>
>>>>>> Hello everyone,
>>>>>>
>>>>>> When I use PetsViewerVTKOpen to output vec in vtk format, is it in
>>>>>> ASCII format or binary format? Are there any options to choose between them?
>>>>>>
>>>>>
>>>>> It is determined by the format, e.g. PETSC_VIEWER_VTK_VTU.
>>>>>
>>>>>    Matt
>>>>>
>>>>>
>>>>>> Thank you.
>>>>>>
>>>>>> Xiangdong
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> 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
>>>>>
>>>>
>>>>
>>>
>>>
>>> --
>>> 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
>>>
>>
>>
>
>
> --
> 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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