H5P_SET_DXPL_MPIO_COLLECTIVE_OPT
Sets a flag governing the use of independent versus collective I/O
Procedure:
H5P_SET_DXPL_MPIO_COLLECTIVE_OPT ( dxpl_id, opt_mode )
Signature:
herr_t H5Pset_dxpl_mpio_collective_opt
(hid_t dxpl_id,
H5FD_mpio_collective_opt_t opt_mode)
Parameters:
id_t dxpl_id | IN: Data transfer property list identifier |
H5FD_mpio_collective_opt_t opt_mode | IN: Optimization flag specifying the use of independent or collective I/O |
Description:
H5P_SET_DXPL_MPIO_COLLECTIVE_OPT enables an application to specify that the HDF5 library will use independent I/O internally when the dataset transfer property list dxpl_id is set for collective I/O, i.e., with H5FD_MPIO_COLLECTIVE specified. This allows the application greater control over low-level I/O while maintaining the collective interface at the application level.
H5P_SET_DXPL_MPIO_COLLECTIVE_OPT works by setting one of the following flags in the parameter opt_mode:
H5FD_MPIO_COLLECTIVE_IO | Use collective I/O (Default) |
H5FD_MPIO_INDIVIDUAL_IO | Use independent I/O |
This function should be used only when H5FD_MPIO_COLLECTIVE has been set through H5P_SET_DXPL_MPIO. In such situations, normal behavior would be to use low-level collective I/O functions, but the library will use low-level MPI independent I/O functions when H5FD_MPIO_INDIVIDUAL_IO is set.
Use of this function is optional.
Returns:
Returns a non-negative value if successful. Otherwise returns a negative value.
Example:
Include Bitbucket Server for Confluence: An error occured
Connection to Bitbucket Server could not be established. Verify that you have properly configured the Bitbucket Server application link for your Confluence space and that your Bitbucket Server instance is up and running. Error details: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
History:
--- Last Modified: August 09, 2019 | 02:12 PM
