[Paraview] Paraview 4.4 Openfoam native reader decomposed read issue

[Leonard Cassady]

Hi,

  I've recently upgraded to Openfoam 3.0 and installed paraview 4.4.  To
speed up reading, I'm using pvserver in parallel (with mpirun) and open the
openfoam solution with the native openfoam reader as a "decomposed case".
  I was able to visualize scalar data as expected.  I was not able to
render the vector velocity data "U".   It just doesn't show up as an option
for coloring surfaces or to apply filters to.  Is this a bug in paraview,
or am I doing something wrong?

  Above is my main question.  Below are general questions regarding
paraview performance.

  As you may know, Openfoam creates directories for each processor (say
192) when solving the case in parallel. It requires the user to run the
same number of parallel processes (mpirun -np 192 <openfoamsolver>
-parallel)  as there are processor directories.  Does pvserver require the
user to also run the same number of processes as there are processor
directories? Is pvserver (when run in parallel) smart enough to not open
every data file on every process for the native openfoam reader, but to
smartly allocate the directories to different instances?  (I know that if I
open a "reconstructed case" with pvserver running in parallel each instance
of pvserver opens the same file and greatly slows the system and overloads
ram.)

   I believe that my computer has good enough graphics processors to handle
rendering.  Once I load in a data set I can re-orient and re-color and
slice very fast.  I also believe that I can open and read the data files
quickly ( about 230 MB/s read rate for my large files).  I believe that the
slowest part of my data processing is the step between reading and
rendering.  It also takes a long time to apply complicated filters like
stream lines.  How can I speed up this part of my visualization?  I have
multiple computers and one of them is much faster at analysis and I can't
figure out why.


-- 
Leonard Cassady PhD
Senior Development Engineer
Intuitive Machines
Cell: 281-755-2553
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