We provide an implementation of the MPI-IO interface via an implementation of the ROMIO ADIO interface. This implementation is included as part of MPICH1 and MPICH2 as well as being available as an independent package. The MPI-IO interface is part of the MPI-2 standard and defines an API for file access from within MPI programs.
Our PVFS2 implementation does not include all the functionality of the MPI-IO specification. In this section we discuss the missing components of MPI-IO for PVFS2.