[Paraview] Clarification on Paraview pvbatch run

[Sebastien Jourdain]

Is it using the VTK classes or the paraview Proxy?

Moreover, the reader/source is responsible to distribute the data to
properly handle parallelism.
If it does not, then you right, everything will happen on the root node.

Hense a quick look at the script can help us determine which part need to
change in order to truly use parallel processing.

Seb


On Thu, Jun 5, 2014 at 8:32 AM, Daniele Obiso <
daniele.obiso at phitecingegneria.it> wrote:

>  Hi Sebastien,
>
> thanks for the reply!
>
> The script is about creating slice and sweep animation. But it's working
> fine, i think there is no problem in it.
> Do you need the script to understand something about the parallelization?
>
> Let me know!
> Daniele
>
>
>
>
>
> On 06/05/2014 04:17 PM, Sebastien Jourdain wrote:
>
> Hi Daniele,
>
>  can you share what your script look like?
>
>  Seb
>
>
>
> On Thu, Jun 5, 2014 at 1:56 AM, Daniele Obiso <
> daniele.obiso at phitecingegneria.it> wrote:
>
>>  Hi All,
>>
>> i'm writing here because i would understand better the functionality of
>> pvbatch in Paraview.
>>
>> At moment i'm able to run Paraview in batch launching a python script,
>> and it works good.
>>
>> Here the line command i launch:
>> */software/Paraview/ParaView-3.12.0-Linux-x86_64/lib/paraview-3.12/mpirun
>> -np 6 /software/Paraview/ParaView-3.12.0-Linux-x86_64/bin/pvbatch
>> python_script.py *
>>
>> The problem is that monitoring at processors loads and memory
>> consumption, it seems that it's actually working on one single processor;
>> in fact if i switch to *-np 2* or even *-np1* nothing changes in terms
>> of computing time.
>> This is happening with various Paraview versions (3.10 -3.12-4.1); is
>> there something missing in the line command? Some other options? Are some
>> Paraview filters just working as serial?
>>
>>
>>
>>
>> Another question would be about running pvbatch on clusters without
>> graphic cards: i know it's possible, compiling Paraview with OSMesa, and
>> adding in the command line  the option
>> --*use-offscreen-rendering*. Could someone clarify also this point?
>>
>> Thank you all in advance!
>> Daniele
>>
>>
>>
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