On 25/11/13 2:34 AM, Gerd Heber wrote:

Nick, the unlimited dimension per se is not the reason.

I suspect your chunk size is way too small.

(That will bloat your chunk index and that's what might be going on.)

What are the chunk sizes on /face_indices and /vertex positions ?

Hi Gerd,

    The chunk size is indeed the problem (I am new to chunking).

    I set it to '1' :-(

I went back to the documentation about chunking and about b-tree and figure that I'd better get a good understanding of how chunking is supported.

When I set it to something I felt reasonable in my usage pattern i.e. 8196, my HDF file becomes smaller than the original input binary file and the previous non-unlimited version of the same HDF5 file.

    All is well now.

Cheers

--
Nicholas Yue
Graphics - RenderMan, Visualization, OpenGL, HDF5
Custom Dev - C++ porting, OSX, Linux, Windows
http://au.linkedin.com/in/nicholasyue
https://vimeo.com/channels/naiadtools

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