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<div class="moz-cite-prefix">Hi David and list. I'm still struggling
with distributing my dataset (bmag) across nodes. My Python
Programmable source script below produces correct output when run
on a single node.<br>
<br>
contr = vtk.vtkMultiProcessController.GetGlobalController()<br>
nranks = contr.GetNumberOfProcesses()<br>
rank = contr.GetLocalProcessId()<br>
<br>
# read in bmag data and process<br>
<br>
executive = self.GetExecutive()<br>
outInfo = executive.GetOutputInformation(0)<br>
updateExtent = [executive.UPDATE_EXTENT().Get(outInfo, i) for i in
xrange(6)]<br>
imageData = self.GetOutput()<br>
imageData.SetExtent(updateExtent)<br>
myout = ns.numpy_to_vtk(bmag.ravel(),1,vtk.VTK_FLOAT)<br>
myout.SetName("B field magnitude")<br>
imageData.GetPointData().SetScalars(myout)<br>
<br>
<br>
I then used the Filters/Parallel/Testing/Python/testTransmit.py
test code as a basis to continue the script to work on multiple
nodes. Following the last line above, I added:<br>
<br>
da = vtk.vtkIntArray()<br>
da.SetNumberOfTuples(6)<br>
if rank == 0:<br>
ext = imageData.GetExtent()<br>
for i in range(6):<br>
da.SetValue(i,ext[i])<br>
contr.Broadcast(da,0)<br>
<br>
ext = []<br>
for i in range(6):<br>
ext.append(da.GetValue(i))<br>
ext = tuple(ext)<br>
<br>
tp = vtk.vtkTrivialProducer()<br>
tp.SetOutput(imageData)<br>
tp.SetWholeExtent(ext)<br>
<br>
xmit = vtk.vtkTransmitImageDataPiece()<br>
xmit.SetInputConnection(tp.GetOutputPort())<br>
xmit.UpdateInformation()<br>
xmit.SetUpdateExtent(rank, nranks, 0)<br>
xmit.Update()<br>
<br>
However, when I run this on two nodes, it looks like both of them
get the same half of the data, rather than the whole dataset
getting split between the two. Can anyone see what might be wrong?
Thanks.<br>
<br>
-jeff<br>
<br>
On 07/23/2015 11:18 AM, David E DeMarle wrote:<br>
</div>
<blockquote
cite="mid:CANjZAi-2kECbCfGX1kYp12Rfa5rH2PYAPyVZy-sEMmJ_KsxAOA@mail.gmail.com"
type="cite">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<div dir="ltr">Excellent.
<div><br>
</div>
<div>No advice yet. Anyone have a worked out example ready? If
so, post it to the wiki please.</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br clear="all">
<div>
<div class="gmail_signature">David E DeMarle<br>
Kitware, Inc.<br>
R&D Engineer<br>
21 Corporate Drive<br>
Clifton Park, NY 12065-8662<br>
Phone: 518-881-4909</div>
</div>
<br>
<div class="gmail_quote">On Thu, Jul 23, 2015 at 2:14 PM, Jeff
Becker <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:jeffrey.c.becker@nasa.gov" target="_blank">jeffrey.c.becker@nasa.gov</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<div>Hi David,<span class=""><br>
<br>
On 07/23/2015 10:57 AM, David E DeMarle wrote:<br>
</span></div>
<span class="">
<blockquote type="cite">
<div dir="ltr">pyhon shell runs on the client side.
<div><br>
</div>
<div>try doing that within the python programmable
filter, which runs on the server side.</div>
</div>
</blockquote>
<br>
</span> Yes that works. Thanks. Now I will try to use that
and follow <br>
<br>
<a moz-do-not-send="true"
href="http://www.paraview.org/pipermail/paraview/2011-August/022421.html"
target="_blank">http://www.paraview.org/pipermail/paraview/2011-August/022421.html</a><br>
<br>
to get my existing Image Data producing Python
Programmable Source to distribute the data across the
servers. Any additional advice? Thanks again.<span
class="HOEnZb"><font color="#888888"><br>
<br>
-jeff</font></span><span class=""><br>
<blockquote type="cite">
<div dir="ltr">
<div><br>
<div><br>
</div>
</div>
</div>
<div class="gmail_extra"><br clear="all">
<div>
<div>David E DeMarle<br>
Kitware, Inc.<br>
R&D Engineer<br>
21 Corporate Drive<br>
Clifton Park, NY 12065-8662<br>
Phone: <a moz-do-not-send="true"
href="tel:518-881-4909" value="+15188814909"
target="_blank">518-881-4909</a></div>
</div>
<br>
<div class="gmail_quote">On Thu, Jul 23, 2015 at
1:53 PM, Jeff Becker <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:jeffrey.c.becker@nasa.gov"
target="_blank">jeffrey.c.becker@nasa.gov</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0
0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">Hi. I do "mpirun -np 4
pvserver --client-host=xxx
--use-offscreen-rendering", and connect a
ParaView client viewer. I can see 4 nodes in the
memory inspector, but when I start a python
shell in ParaView, and do:<br>
<br>
from mpi4py import MPI<br>
print MPI.COMM_WORLD.Get_size()<br>
<br>
I get the answer 1. Shouldn't it be 4? Thanks.<br>
<br>
-jeff<br>
<br>
<br>
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