[hdf-forum] HDF5 chunking mechanism

[Mark Howison]

Hi all,

I'm trying to write out a 512^3 float32 dataset using 64^3 chunk
dimensions. I'm seeing the H5write call break into many 256 byte write
calls (64 floats) instead of what I expected: fewer 1048576 byte write
calls (64^3 floats). Before I delved into this further, I just wanted
to verify that HDF5 should be using the 1048576 byte writes in this
particular chunking case. This is a new case for me, because in the
past I've almost always had the x-dimension for the chunks equal to
the x-dimension of the hyperslab.

Thanks,
Mark

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