The lack of concurrent access support in the official HDF5 library (the only implementation with full format support) can be a major drawback. There is ongoing

The lack of concurrent access support in the official HDF5 library (the only implementation with full format support) can be a major drawback. There is ongoing work on that front [1] though it's unclear when it will land. [1] https://github.com/LifeboatLLC/MT-HDF5 https://github.com/LifeboatLLC/MT-HDF5