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How it normally looks (v1.6). Open MPI. All the other MPI_* API functions, constants, handles. MPI_File _* API functions, constants, handles. ROMIO plugin. How it normally looks (v1.7). Open MPI. All the other MPI_* API functions, constants, handles.

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How it normally looks v1 6
How it normally looks (v1.6)

Open MPI

All the other MPI_* API functions, constants, handles

MPI_File_* API functions, constants, handles

ROMIO plugin


How it normally looks v1 7
How it normally looks (v1.7)

Open MPI

All the other MPI_* API functions, constants, handles

MPI_File_* API functions, constants, handles

ROMIO plugin

OMPIO plugin


Disable mpi io v1 6
--disable-mpi-io (v1.6)

Open MPI

All the other MPI_* API functions, constants, handles

MPI_File_* API functions, constants, handles

Compile/link time error

if you call MPI_File_open()

because that symbol doesn’t

exist in mpi.h or libmpi.

ROMIO plugin


Disable mpi io v1 7
--disable-mpi-io (v1.7)

Open MPI

All the other MPI_* API functions, constants, handles

MPI_File_* API functions, constants, handles

ROMIO plugin

OMPIO plugin


Disable io romio v1 6
--disable-io-romio (v1.6)

Open MPI

All the other MPI_* API functions, constants, handles

MPI_File_* API functions, constants, handles

ROMIO plugin

Run-time error if you call

MPI_File_open() because

OMPI has no plugin to do

the MPI I/O functionality.


Disable io romio v1 7
--disable-io-romio (v1.7)

Open MPI

All the other MPI_* API functions, constants, handles

MPI_File_* API functions, constants, handles

No run-time error if you call MPI_File_open() because OMPI will use the OMPIO plugin

ROMIO plugin

OMPIO plugin


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