Compression

Chunked datasets can be compressed if HDF5 was built with zlib support. Use these functions to set or check the compression level:

    file.setCompressionLevel(3);            // 0 to 9: 0 to disable compression, 9 for maximum compression. Recommended 2 to 5
    file.getCompressionLevel();             // Gets the current compression level
    h5pp::hdf5::isCompressionAvaliable();   // True if your installation of HDF5 has zlib support 

or pass a temporary compression level as the fifth argument when writing a dataset:

    file.writeDataset(myData, "science/myCompressedData", H5D_CHUNKED, std::nullopt, 3); // Creates a chunked dataset with compression level 3.

or use the special member function for this task:

   file.writeDataset_compressed(myData, "science/myCompressedData", 3) // // Creates a chunked dataset with compression level 3 (default).