Get size on disk of dataset programmatically

HDF5 Library
1

I’m trying to analyze the effect on disk usage of applying compression to our datasets. h5dump can tell me the size of a dataset on disk. However, h5dump is a bit of blunt instrument–I’d like to be able to compare the sizes of corresponding objects in different files among other things. Is there a way I can get the size information programmatically, in particular from within Python?

2

H5Dget_storage_size would be the HDF5 library function. I believe it’s exposed in the low-level h5py API. Something like this should work:

dsid = dset.id       # where dset is a high-level h5py.Dataset
size_bytes = dsid.get_storage_size()

G.

3

Thanks! I’ll give that a try.