[Paraview] running paraview in parallel with a batch script/MPI

[Cook, Rich]

OK, so what I'm hearing is that the pvbatch process will use its MPI rank to decompose the data correctly.
Does this decomposition work correctly for all data formats?  I suspect not, so is there a way to confirm that decomposition is working for a particular type of data?  In the GUI, I can paint the data with the process ID scalars filter.  Any similar trick for pvbatch?
Thanks!
-- Rich

On Feb 12, 2013, at 11:31 PM, Pat Marion wrote:

Hi Rich,

The command line will be:

mpirun -np 1 /path/to/pvbatch /path/to/script.py


The pvbatch executable is similar to pvserver, except proc 0 doesn't wait for a client connection, it reads the python script specified on the command line and executes the script as if it were instructions from a client.  The script will be read and interpreted on proc 0, but the processing will be carried out by all the satellite procs, just like pvserver.

I'd recommend starting with a script that is very simple, like:

# testSphere.py

from paraview.simple import *

Sphere()
writer = XMLPPolyDataWriter(FileName='sphere.pvtp')
writer.UpdatePipeline()


Try getting that to work using -np 1, then try -np 2, you should find pieces of there sphere written by both processes.

Pat

p.s. If your data is unstructured grid, then your writer would be a XMLPUnstructuredGridWriter.  Also, I'm not sure if the name should be "XMLP..." or "XMLPartitioned..."


On Wed, Feb 13, 2013 at 11:48 AM, Cook, Rich <cook47 at llnl.gov<mailto:cook47 at llnl.gov>> wrote:
Hello, ParaView genii,

I would like to run ParaView to view some data in parallel using the following script from a user as a basis.  I'm not sure how to do this right.  I've never scripted Paraview before, and am thus clueless how to make it work.  Can someone on this list tell me how Paraview scripting with MPI works or point me to a tutorial on your massive tutorial pages?  The data is very large and it would be great to decompose the data across the cluster.

Thanks!

try: paraview.simple
except: from paraview.simple import *
paraview.simple._DisableFirstRenderCameraReset()

filein = XMLPartitionedUnstructuredGridReader( FileName=['/p/lscratchd/bodart1/test_para/duct.020000.pvtu'] )

Slice1 = Slice( SliceType="Plane" )

Slice1.SliceOffsetValues = [0.0]
Slice1.SliceType.Origin = [0.0,0.0,0.0]
Slice1.SliceType.Normal = [0.0,0.0,1.0]
Slice1.SliceType = "Plane"

CleantoGrid1 = CleantoGrid()


CellDatatoPointData1 = CellDatatoPointData()

w.FileName="test_slice.vtu"
w.UpdatePipeline()


--
✐Richard Cook
✇ Lawrence Livermore National Laboratory
Bldg-453 Rm-4024, Mail Stop L-557
7000 East Avenue,  Livermore, CA, 94550, USA
☎ (office) (925) 423-9605
☎ (fax) (925) 423-6961
---
Information Management & Graphics Grp., Services & Development Div., Integrated Computing & Communications Dept.
(opinions expressed herein are mine and not those of LLNL)



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--
✐Richard Cook
✇ Lawrence Livermore National Laboratory
Bldg-453 Rm-4024, Mail Stop L-557
7000 East Avenue,  Livermore, CA, 94550, USA
☎ (office) (925) 423-9605
☎ (fax) (925) 423-6961
---
Information Management & Graphics Grp., Services & Development Div., Integrated Computing & Communications Dept.
(opinions expressed herein are mine and not those of LLNL)



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