H5P_SET_DXPL_MPIO_CHUNK_OPT
Sets a flag specifying linked-chunk I/O or multi-chunk I/O
Procedure:
H5P_SET_DXPL_MPIO_CHUNK_OPT ( dxpl_id, opt_mode )
Signature:
herr_t H5Pset_dxpl_mpio_chunk_opt
(hid_t dxpl_id,
H5FD_mpio_chunk_opt_t opt_mode)
Parameters:
hid_t dxpl_id | IN: Data transfer property list identifier |
H5FD_mpio_chunk_opt_t opt_mode | IN: Optimization flag specifying linked-chunk I/O or multi-chunk I/O |
Description:
H5P_SET_DXPL_MPIO_CHUNK_OPT specifies whether I/O is to be performed as linked-chunk I/O or as multi-chunk I/O. This function overrides the HDF5 library's internal algorithm for determining which mechanism to use.
When an application uses collective I/O with chunked storage, the HDF5 library normally uses an internal algorithm to determine whether that I/O activity should be conducted as one linked-chunk I/O or as multi-chunk I/O. H5P_SET_DXPL_MPIO_CHUNK_OPT is provided so that an application can override the library's algorithm in circumstances where the library might lack the information needed to make an optimal decision.
H5P_SET_DXPL_MPIO_CHUNK_OPT works by setting one of the following flags in the parameter opt_mode:
H5FD_MPIO_CHUNK_ONE_IO | Do one link chunked I/O |
H5FD_MPIO_CHUNK_MULTI_IO | Do multi-chunked I/O |
This function works by setting a corresponding property in the dataset transfer property list dxpl_id.
The library performs I/O in the specified manner unless it determines that the low-level MPI IO package does not support the requested behavior; in such cases, the HDF5 library will internally use independent I/O.
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 | 02:02 PM
