Programming Interfaces

• MPI / shmem

  • MPI one-sided ~= shmem performance
• OpenMP

  • For node parallelism (small-scale)
• Co-Array Fortran: next steps?
• Standard APIs

  • Linux
  • Posix, TCP/IP, NFS, …
  • Key parts of Supercomputing API
  • Fortran95, C, C++
  • FFIO

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