Hierarchical Data Format version 5 (HDF5) is a file format for archiving large data sets.  Maintained by The HDF Group, this powerful open source package is used by many government and commercial organizations.  An open source prototype HDF5-to-CloudTurbine application has been released: source code is available at https://github.com/jpw-erigo/HDF5toCT and documentation is under Apps/Utility/HDF5 to CloudTurbine.