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.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.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