I/O

MPI.File.open(comm::Comm, filename::AbstractString; keywords...)

Open the file identified by filename. This is a collective operation on comm.

Supported keywords are as follows:

• read, write, create, append have the same behaviour and defaults as Base.open.
• sequential: file will only be accessed sequentially (default: false)
• uniqueopen: file will not be concurrently opened elsewhere (default: false)
• deleteonclose: delete file on close (default: false)

Any additional keywords are passed via an Info object, and are implementation dependent.

External links

• MPI_File_open man page: OpenMPI, MPICH

MPI.File.set_view!(file::FileHandle, disp::Integer, etype::Datatype, filetype::Datatype, datarep::AbstractString; kwargs...)

Set the current process's view of file.

The start of the view is set to disp; the type of data is set to etype; the distribution of data to processes is set to filetype; and the representation of data in the file is set to datarep: one of "native" (default), "internal", or "external32".

External links

• MPI_File_set_view man page: OpenMPI, MPICH

MPI.File.get_byte_offset(file::FileHandle, offset::Integer)

Converts a view-relative offset into an absolute byte position. Returns the absolute byte position (from the beginning of the file) of offset relative to the current view of file.

External links

• MPI_File_get_byte_offset man page: OpenMPI, MPICH

MPI.File.sync(fh::FileHandle)

A collective operation causing all previous writes to fh by the calling process to be transferred to the storage device. If other processes have made updates to the storage device, then all such updates become visible to subsequent reads of fh by the calling process.

External links

• MPI_File_sync man page: OpenMPI, MPICH

MPI.File.get_atomicity(file::FileHandle)

Get the consistency option for the fh. If false it is non-atomic.

External links

• MPI_File_get_atomicity man page: OpenMPI, MPICH

MPI.File.set_atomicity(file::FileHandle, flag::Bool)

Set the consistency option for the fh.

External links

• MPI_File_get_atomicity man page: OpenMPI, MPICH

MPI.File.read!(file::FileHandle, data)

Reads current view of file into data. data can be a Buffer, or any object for which Buffer(data) is defined.

See also

• MPI.File.set_view! to set the current view of the file
• MPI.File.read_all! for the collective operation

External links

• MPI_File_read man page: OpenMPI, MPICH

MPI.File.read_all!(file::FileHandle, data)

Reads current view of file into data. data can be a Buffer, or any object for which Buffer(data) is defined. This is a collective operation, so must be called on all ranks in the communicator on which file was opened.

See also

• MPI.File.set_view! to set the current view of the file
• MPI.File.read! for the noncollective operation

External links

• MPI_File_read_all man page: OpenMPI, MPICH

MPI.File.write(file::FileHandle, data)

Writes data to the current view of file. data can be a Buffer, or any object for which Buffer_send(data) is defined.

See also

• MPI.File.set_view! to set the current view of the file
• MPI.File.write_all for the collective operation

External links

• MPI_File_write man page: OpenMPI, MPICH

MPI.File.write_all(file::FileHandle, data)

Writes data to the current view of file. data can be a Buffer, or any object for which Buffer_send(data) is defined. This is a collective operation, so must be called on all ranks in the communicator on which file was opened.

See also

• MPI.File.set_view! to set the current view of the file
• MPI.File.write for the noncollective operation

External links

• MPI_File_write_all man page: OpenMPI, MPICH

MPI.File.read_at!(file::FileHandle, offset::Integer, data)

Reads from file at position offset into data. data can be a Buffer, or any object for which Buffer(data) is defined.

See also

• MPI.File.read_at_all! for the collective operation

External links

• MPI_File_read_at man page: OpenMPI, MPICH

MPI.File.read_at_all!(file::FileHandle, offset::Integer, data)

Reads from file at position offset into data. data can be a Buffer, or any object for which Buffer(data) is defined. This is a collective operation, so must be called on all ranks in the communicator on which file was opened.

See also

• MPI.File.read_at! for the noncollective operation

External links

• MPI_File_read_at_all man page: OpenMPI, MPICH

MPI.File.write_at(file::FileHandle, offset::Integer, data)

Writes data to file at position offset. data can be a Buffer, or any object for which Buffer_send(data) is defined.

See also

• MPI.File.write_at_all for the collective operation

External links

• MPI_File_write_at man page: OpenMPI, MPICH

MPI.File.write_at_all(file::FileHandle, offset::Integer, data)

Writes from data to file at position offset. data can be a Buffer, or any object for which Buffer_send(data) is defined. This is a collective operation, so must be called on all ranks in the communicator on which file was opened.

See also

• MPI.File.write_at for the noncollective operation

External links

• MPI_File_write_at_all man page: OpenMPI, MPICH

MPI.File.read_shared!(file::FileHandle, data)

Reads from file using the shared file pointer into data. data can be a Buffer, or any object for which Buffer(data) is defined.

See also

• MPI.File.read_ordered! for the collective operation

External links

• MPI_File_read_shared man page: OpenMPI, MPICH

MPI.File.write_shared(file::FileHandle, data)

Writes to file using the shared file pointer from data. data can be a Buffer, or any object for which Buffer(data) is defined.

See also

• MPI.File.write_ordered for the collective operation

External links

• MPI_File_write_shared man page: OpenMPI, MPICH

MPI.File.read_ordered!(file::FileHandle, data)

Collectively reads in rank order from file using the shared file pointer into data. data can be a Buffer, or any object for which Buffer(data) is defined. This is a collective operation, so must be called on all ranks in the communicator on which file was opened.

See also

• MPI.File.read_shared! for the noncollective operation

External links

• MPI_File_read_ordered man page: OpenMPI, MPICH

MPI.File.write_ordered(file::FileHandle, data)

Collectively writes in rank order to file using the shared file pointer from data. data can be a Buffer, or any object for which Buffer(data) is defined. This is a collective operation, so must be called on all ranks in the communicator on which file was opened.

See also

• MPI.File.write_shared for the noncollective operation

External links

• MPI_File_write_ordered man page: OpenMPI, MPICH

MPI.File.seek_shared(file::FileHandle, offset::Integer, whence::Seek=SEEK_SET)

Updates the shared file pointer according to whence, which has the following possible values:

• MPI.File.SEEK_SET (default): the pointer is set to offset
• MPI.File.SEEK_CUR: the pointer is set to the current pointer position plus offset
• MPI.File.SEEK_END: the pointer is set to the end of file plus offset

This is a collective operation, and must be called with the same value on all processes in the communicator.

External links

• MPI_File_seek_shared man page: OpenMPI, MPICH

MPI.File.get_position_shared(file::FileHandle)

The current position of the shared file pointer (in etype units) relative to the current view.

External links

• MPI_File_get_position_shared man page: OpenMPI, MPICH