Demonstration at SC97: High-Performance Networking and Computing,
San Jose, CA, November 15-21, 1997

• ROMIO is a freely available, high-performance, portable MPI-IO implementation

• ROMIO has so far been implemented on several different machines (IBM SP, Intel Paragon, HP/Convex Exemplar, SGI Origin 2000, networks of workstations, etc.) and on multiple file systems (Intel PFS, IBM PIOFS, Unix, NFS)

• The key component that makes this portable implementation possible is an internal abstract I/O interface layer called ADIO

• ROMIO is designed to work with any vendor or public-domain MPI implementation, not just MPICH

• ROMIO v/s PFS/PIOFS raw performance

• Results with Collective I/O on Caltech Paragon and ANL SP for
  • Astrophysics application template

  • NAS BTIO benchmark