Looks like I need to study up on PV scripting -- I'm so used to VisIt and
EnSight, I was hoping the syntax would be pretty intuitive but some of what you
are doing there is not clear to me, just because I'm such a newbie. Thanks for
the clarification. I think this sets my mind at ease and helps my user.
-- Rich
On Feb 13, 2013, at 9:18 PM, Pat Marion wrote:
Right, the decomposition is up to the reader, so you need a reader that is
"parallel aware". If you're starting with a .pvtu file, then you should be all
set. If you look inside the pvtu file, it should just be an xml format that
lists all the pieces, and the pieces are .vtu. Each rank will read a different
subset of the .vtu files. Since pvbatch functions just like pvserver, you can
try your work interactively with pvserver first. In fact, you can connect
ParaView to a parallel pvserver, then paste the python script line for line
into ParaView's python console and you should get the same results.
You can color by process ID scalars using pvbatch. I have script that I use
for testing which does exactly that. Notice that the script creates a
Sphere(), you could replace that with your reader.
# testParallelRender.py
print "importing paraview.simple..."
from paraview.simple import *
n_procs =
servermanager.vtkProcessModule.GetProcessModule().GetNumberOfLocalPartitions()
print "number of ranks: ", n_procs
print "create pipeline..."
Sphere(ThetaResolution=100, PhiResolution=100)
ProcessIdScalars()
UpdatePipeline()
print "creating view..."
CreateRenderView()
print "create reps..."
Show()
lt = CreateLookupTable(RGBPoints=[0.0, 0, 0, 1, n_procs-1, 1, 0, 0], ColorSpace
= "HSV")
SetDisplayProperties(ColorAttributeType=0, ColorArrayName="ProcessId",
LookupTable=lt)
print "render..."
Render()
GetActiveView().UseOffscreenRenderingForScreenshots = 0
print "writing..."
WriteImage("coloredSphere.png")
print "Done."
Pat
On Thu, Feb 14, 2013 at 3:16 AM, Cook, Rich
<[email protected]<mailto:[email protected]>> wrote:
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
<[email protected]<mailto:[email protected]>> 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<tel:%28925%29%20423-9605>
☎ (fax) (925) 423-6961<tel:%28925%29%20423-6961>
---
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<tel:%28925%29%20423-9605>
☎ (fax) (925) 423-6961<tel:%28925%29%20423-6961>
---
Information Management & Graphics Grp., Services & Development Div., Integrated
Computing & Communications Dept.
(opinions expressed herein are mine and not those of LLNL)
--
✐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)
_______________________________________________
Powered by www.kitware.com
Visit other Kitware open-source projects at
http://www.kitware.com/opensource/opensource.html
Please keep messages on-topic and check the ParaView Wiki at:
http://paraview.org/Wiki/ParaView
Follow this link to subscribe/unsubscribe:
http://www.paraview.org/mailman/listinfo/paraview
