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HDF5 2.0.0.258fa78
API Reference
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HDF5 2.0.0.258fa78
API Reference
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This document addresses two topics of concern in a parallel computing environment:
The term Compatibility Macro Mapping Options in the "Additional notes" column indicates that the first item in the "Function" column of the same row is a macro that is selectively mapped to one of the two immediately-following functions. For example, H5Acreate is a macro that can be mapped to either H5Acreate1 or H5Acreate2. This mapping is configurable and is explained in API Compatibility Macros. The macro structure was introduced at HDF5 Release 1.8.0.
The following functions must always be called collectively.
| API | Function | All processes: same datatype & dataspace | All processes: same access properties | All processes: same creation properties | Available in releases since | Additional notes |
|---|---|---|---|---|---|---|
| H5A | H5Acreate H5Acreate1 H5Acreate2 | X | X | X | 1.8.x | Compatibility Macro Mapping Options The function H5Acreate was renamed to H5Acreate1 at Release 1.8.0. |
| H5Acreate_by_name | X | X | X | 1.8.x | ||
| H5Adelete | ||||||
| H5Adelete_by_idx | 1.8.x | |||||
| H5Adelete_by_name | 1.8.x | |||||
| H5Arename | 1.6.x | |||||
| H5Arename_by_name | 1.8.x | |||||
| H5Awrite | Because raw data for an attribute is cached locally, all processes must participate in order to guarantee that future H5Aread calls return correct results on all processes. | |||||
| H5D | H5Dcreate H5Dcreate1 H5Dcreate2 | X | X | X | 1.8.x | Compatibility Macro Mapping Options The function H5Dcreate was renamed to H5Dcreate1 at Release 1.8.0. |
| H5Dcreate_anon | X | X | X | 1.8.x | ||
| H5Dextend | All processes must participate only if the number of chunks in the dataset actually changes. All processes must use the same dataspace dimensions. | |||||
| H5Dset_extent | 1.6.x | All processes must participate only if the number of chunks in the dataset actually changes. All processes must use the same dataspace dimensions. | ||||
| H5F | H5Fclose | All processes must participate only if this is the last reference to the file identifier. | ||||
| H5Fcreate | X | X | ||||
| H5Fflush | ||||||
| H5Fmount | ||||||
| H5Fopen | X | |||||
| H5Freopen | ||||||
| H5Funmount | ||||||
| H5G | H5Gcreate H5Gcreate1 H5Gcreate2 | X | X | 1.8.x | Compatibility Macro Mapping Options The function H5Gcreate was renamed to H5Gcreate1 at Release 1.8.0. | |
| H5Gcreate_anon | X | X | 1.8.x | |||
| H5Glink | ||||||
| H5Glink2 | 1.6.x | |||||
| H5Gmove | ||||||
| H5Gmove2 | 1.6.x | |||||
| H5Gset_comment | ||||||
| H5Gunlink | ||||||
| H5I | H5Idec_ref | 1.6.x | This function may be called independently if the object identifier does not refer to an object that was collectively opened. | |||
| H5Iinc_ref | 1.6.x | This function may be called independently if the object identifier does not refer to an object that was collectively opened. | ||||
| H5L | H5Lcopy | 1.8.x | ||||
| H5Lcreate_external | X | 1.8.x | ||||
| H5Lcreate_hard | X | 1.8.x | ||||
| H5Lcreate_soft | X | 1.8.x | ||||
| H5Lcreate_ud | X | 1.8.x | ||||
| H5Ldelete | 1.8.x | |||||
| H5Ldelete_by_idx | 1.8.x | |||||
| H5Lmove | 1.8.x | |||||
| H5O | H5Ocopy | 1.8.x | ||||
| H5Odecr_refcount | 1.8.x | |||||
| H5Oincr_refcount | 1.8.x | |||||
| H5Olink | 1.8.x | |||||
| H5Oset_comment | 1.8.x | |||||
| H5Oset_comment_by_name | 1.8.x | |||||
| H5R | H5Rcreate | |||||
| H5T | H5Tcommit H5Tcommit1 H5Tcommit2 | X | X | 1.8.x | Compatibility Macro Mapping Options The function H5Tcommit was renamed to H5Tcommit1 at Release 1.8.0. | |
| H5Tcommit_anon | X | X | 1.8.x | |||
The following functions must normally be called collectively. If, however, the target object will not be modified, they may be called independently.
| API | Function | All processes: same datatype & dataspace | All processes: same access properties | All processes: same creation properties | Available in releases since | Additional notes |
|---|---|---|---|---|---|---|
| H5A | H5Aclose | All processes must participate only if all file identifiers for a file have been closed and this is the last outstanding object identifier. | ||||
| H5Aopen | X | 1.8.x | ||||
| H5Aopen_by_idx | X | 1.8.x | ||||
| H5Aopen_by_name | X | 1.8.x | ||||
| H5Aopen_idx | X | |||||
| H5Aopen_name | X | |||||
| H5D | H5Dclose | All processes must participate only if all file identifiers for a file have been closed and this is the last outstanding object identifier. | ||||
| H5Dopen H5Dopen1 H5Dopen2 | X | 1.8.x | Compatibility Macro Mapping Options The function H5Dopen was renamed to H5Dopen1 at Release 1.8.0. | |||
| H5G | H5Gclose | All processes must participate only if all file identifiers for a file have been closed and this is the last outstanding object identifier. | ||||
| H5Gopen H5Gopen1 H5Gopen2 | X | 1.8.x | Compatibility Macro Mapping Options The function H5Gopen was renamed to H5Gopen1 at Release 1.8.0. | |||
| H5I | H5Iget_file_id | 1.8.x | ||||
| H5O | H5Oclose | 1.8.x | All processes must participate only if all file identifiers for a file have been closed and this is the last outstanding object identifier. | |||
| H5Oopen | X | 1.8.x | ||||
| H5Oopen_by_addr | X | 1.8.x | ||||
| H5Oopen_by_idx | X | 1.8.x | ||||
| H5R | H5Rdereference | |||||
| H5T | H5Tclose | All processes must participate only if the datatype is for a committed datatype, all the file identifiers for the file have been closed, and this is the last outstanding object identifier. | ||||
| H5Topen H5Topen1 H5Topen2 | X | 1.8.x | Compatibility Macro Mapping Options The function H5Topen was renamed to H5Topen1 at Release 1.8.0. | |||
The following properties must be set to the same values for an object or link in all cases where the object or link is accessed in a parallel program.
1.9.7 