blosc filter is available for encoding and decoding. ....Create dataset ................ ....Writing blosc compressed data ................ ....Close the file and reopen for reading ........ Filter info is available from the dataset creation property Filter identifier is 32001 Number of parameters is 7 with the value 4 1 2 To find more about the filter check HDF5 blosc filter; see http://www.hdfgroup.org/services/contributions.html ....Reading blosc compressed data ................ Maximum value in DS1 is 1890 blosc filter is available now since H5Dread triggered loading of the filter.