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| HDF5 Last Updated on 2026-03-23 The HDF5 Field Guide

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H5FDmpio.h File Reference
`#include "H5FDpublic.h"`

## Macros
#define | H5FD_MPIO (H5OPEN H5FD_MPIO_id_g)

## Functions
herr_t | H5Pget_dxpl_mpio (hid_t dxpl_id, H5FD_mpio_xfer_t *xfer_mode)
| Returns the data transfer mode.
herr_t | H5Pget_fapl_mpio (hid_t fapl_id, MPI_Comm *comm, MPI_Info *info)
| Returns MPI IO communicator information.
herr_t | H5Pset_dxpl_mpio (hid_t dxpl_id, H5FD_mpio_xfer_t xfer_mode)
| Sets data transfer mode.
herr_t | H5Pset_dxpl_mpio_chunk_opt (hid_t dxpl_id, H5FD_mpio_chunk_opt_t opt_mode)
| Sets a flag specifying linked-chunk I/O or multi-chunk I/O.
herr_t | H5Pset_dxpl_mpio_chunk_opt_num (hid_t dxpl_id, unsigned num_chunk_per_proc)
| Sets a numeric threshold for linked-chunk I/O.
herr_t | H5Pset_dxpl_mpio_chunk_opt_ratio (hid_t dxpl_id, unsigned percent_num_proc_per_chunk)
| Sets a ratio threshold for collective I/O.
herr_t | H5Pset_dxpl_mpio_collective_opt (hid_t dxpl_id, H5FD_mpio_collective_opt_t opt_mode)
| Sets low-level data transfer mode.
herr_t | H5Pset_fapl_mpio (hid_t fapl_id, MPI_Comm comm, MPI_Info info)
| Stores MPI IO communicator information to the file access property list.

## Variables
bool | H5FD_mpi_opt_types_g

## Macro Definition Documentation

## ◆ H5FD_MPIO

#define H5FD_MPIO (H5OPEN H5FD_MPIO_id_g)

ID for the mpio VFD

## Variable Documentation

## ◆ H5FD_mpi_opt_types_g

bool H5FD_mpi_opt_types_g
| extern