[Paraview] XDMF/HDF5 reader memory usage

[Tobias Brandvik]

Hi all,

I'm experiencing some strange behaviour with the XDMF reader when
trying to create an animation of the data contained in a set of HDF5
files. My approach is as follows:

1. One XDMF file which is a temporal collection containing links to a
list of other XDMF files
2. One XDMF file for each time step (linked to by the XDMF file
above), each of which is a spatial collection of several 2D structured
grids. The data for the grids is contained in HDF5 files (also one for
each time step).

When I open the file with the temporal collection in Paraview, the
data shows up as a temporal collection as expected. I can step back
and forth in time and everything seems to work just fine. However, as
I load in more time steps (by stepping forward in time), Paraview's
memory usage keeps increasing. It seems like it is not freeing the
memory associated with the old time step when reading in a new one.

To illustrate this problem, I've uploaded a collection of XDMF and
HDF5 files to the following location:

http://www2.eng.cam.ac.uk/~tb302/xdmf_example.tar.gz

There are 10 time steps in the collection. The data set is very small,
but it should still show the problem (I could easily generate larger
data sets if necessary). I get the same behaviour in Paraview 3.6 and
3.8 on both Centos 5.3 (64 bit) and Mac OS X 10.5.

Any help would be greatly appreciated.

Best wishes,
Tobias

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Tobias Brandvik
PhD Student
Whittle Laboratory, University of Cambridge
1 JJ Thomson Avenue
Cambridge CB3 0DY, UK