[Paraview] Question about Paraview and parallel processing

Adam Larios alarios at math.tamu.edu
Wed Jan 2 15:45:00 EST 2013


To whom it may concern,

I have some data which takes on different values in space, which 
normally would be easy to view in Paraview.  The problem is that the 
space (which is a big cube) is decomposed into different subdomains 
since the data was processed in parallel, and each subdomain is saved in 
a different file.  Currently, paraview interprets each subdomain as a 
different time-step.  Is it possible to get paraview to load all of the 
parallelized data and view it as a single time step?

Of course, I could parse all of these files into one big file, but I 
would like to avoid this extra step if necessary, since the files are 
updated regularly, and an extra post-processing step would slow things 
down significantly.

My files are in legacy VTK format.  They look like this, for example 
(the real runs are much larger than this):

     #==== myData_00.vtk ====#
     vtk myData
     ASCII
     DATASET STRUCTURED_GRID
     DIMENSIONS      12       12       12
     POINTS    1728 float
     0.9519978E-01  0.9519978E-01  0.9519978E-01
     0.2855993E+00  0.9519978E-01  0.9519978E-01
     0.4759989E+00  0.9519978E-01  0.9519978E-01
     ......

     #==== myData_01.vtk ====#
     vtk myData
     ASCII
     DATASET STRUCTURED_GRID
     DIMENSIONS      12       12       12
     POINTS    1728 float
     0.9519978E-01  0.9519978E-01  0.2189595E+01
     0.2855993E+00  0.9519978E-01  0.2189595E+01
     0.4759989E+00  0.9519978E-01  0.2189595E+01
     ......

and so on up to myData_07.vtk.  Visit can stitch all of these domains 
together with a simple file that tells what all the other files are:

     #==== myData.visit ====#
     !NBLOCKS      8
     myData_00.vtk
     myData_01.vtk
     myData_02.vtk
     myData_03.vtk
     myData_04.vtk
     myData_05.vtk
     myData_06.vtk
     myData_07.vtk

Is there anything I can do to get Paraview to interpret these as a 
single data set?  Any help would be much appreciated!  (Also, my 
apologies in advance if this is not the right place to post this kind of 
thing.)

Best regards,
Adam


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