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61 lines
2.4 KiB
C
61 lines
2.4 KiB
C
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by The HDF Group. *
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* All rights reserved. *
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* *
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* This file is part of HDF5. The full HDF5 copyright notice, including *
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* terms governing use, modification, and redistribution, is contained in *
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* the COPYING file, which can be found at the root of the source code *
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* distribution tree, or in https://www.hdfgroup.org/licenses. *
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* If you do not have access to either file, you may request a copy from *
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* help@hdfgroup.org. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/*
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* Programmer: Quincey Koziol
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* Friday, January 30, 2004
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*
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* Purpose: The public header file for common items for all MPI VFL drivers
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*/
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#ifndef H5FDmpi_H
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#define H5FDmpi_H
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/***** Macros for One linked collective IO case. *****/
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/* The default value to do one linked collective IO for all chunks.
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If the average number of chunks per process is greater than this value,
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the library will create an MPI derived datatype to link all chunks to do collective IO.
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The user can set this value through an API. */
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#define H5D_ONE_LINK_CHUNK_IO_THRESHOLD 0
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/***** Macros for multi-chunk collective IO case. *****/
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/* The default value of the threshold to do collective IO for this chunk.
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If the average percentage of processes per chunk is greater than the default value,
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collective IO is done for this chunk.
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*/
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#define H5D_MULTI_CHUNK_IO_COL_THRESHOLD 60
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/**
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* Type of I/O for data transfer properties
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*/
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typedef enum H5FD_mpio_xfer_t {
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H5FD_MPIO_INDEPENDENT = 0, /**< Use independent I/O access */
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H5FD_MPIO_COLLECTIVE /**< Use collective I/O access */
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} H5FD_mpio_xfer_t;
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/* Type of chunked dataset I/O */
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typedef enum H5FD_mpio_chunk_opt_t {
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H5FD_MPIO_CHUNK_DEFAULT = 0,
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H5FD_MPIO_CHUNK_ONE_IO, /*zero is the default*/
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H5FD_MPIO_CHUNK_MULTI_IO
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} H5FD_mpio_chunk_opt_t;
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/* Type of collective I/O */
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typedef enum H5FD_mpio_collective_opt_t {
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H5FD_MPIO_COLLECTIVE_IO = 0,
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H5FD_MPIO_INDIVIDUAL_IO /*zero is the default*/
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} H5FD_mpio_collective_opt_t;
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/* Include all the MPI VFL headers */
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#include "H5FDmpio.h" /* MPI I/O file driver */
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#endif /* H5FDmpi_H */
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