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| author | Quincey Koziol <koziol@hdfgroup.org> | 2004-01-31 01:38:44 (GMT) |
|---|---|---|
| committer | Quincey Koziol <koziol@hdfgroup.org> | 2004-01-31 01:38:44 (GMT) |
| commit | 138bc92ebdb7c6e1ad379dcdabae21bf0a79ab0d (patch) | |
| tree | 046bd488f60127ac3a6ba0edbd482b44f022c788 /doc/html/Environment.html | |
| parent | f499912c3247e592a0eeef7207b917428756b094 (diff) | |
| download | hdf5-138bc92ebdb7c6e1ad379dcdabae21bf0a79ab0d.zip hdf5-138bc92ebdb7c6e1ad379dcdabae21bf0a79ab0d.tar.gz hdf5-138bc92ebdb7c6e1ad379dcdabae21bf0a79ab0d.tar.bz2 | |
[svn-r8126] Purpose:
Bug fix/optimization
Description:
Address slowdown in MPI-I/O file metadata operations that was introduced
mid-stream. We now _require_ a POSIX compliant parallel file system for the
MPI-I/O file driver (as well as for the MPI-POSIX file driver).
Also optimized file open operation when the file is being created by
reducing the number of collective & syncronizing calls.
Additionally, refactor the MPI routines into a common place, eliminating
duplicated code.
Platforms tested:
FreeBSD 4.9 (sleipnir) w/parallel
h5committest
Diffstat (limited to 'doc/html/Environment.html')
| -rw-r--r-- | doc/html/Environment.html | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/doc/html/Environment.html b/doc/html/Environment.html index af306f3..a00998b 100644 --- a/doc/html/Environment.html +++ b/doc/html/Environment.html @@ -87,6 +87,10 @@ their defined effects are as follows: directory do not remove temporary HDF5 data files. The default is for each test to remove the files before exit. + <dt><tt>HDF5_DISABLE_VERSION_CHECK</tt> + <dd>When set to <code>1</code>, HDF5 will not abort when the version + of the HDF5 headers doesn't match the version of the HDF5 library. + <dt><tt>HDF5_MPI_OPT_TYPES</tt> (for parallel beta version only) <dd>When set to <code>1</code>, PHDF5 will use the MPI optimized @@ -94,13 +98,6 @@ their defined effects are as follows: Currently, this optimization fails when accessing extendable datasets. The default is not to use the optimized code. - <dt><tt>HDF5_MPI_1_METAWRITE</tt> - (for parallel beta version only) - <dd>When set to <code>1</code>, PHDF5 will write the metadata - via process 0 of each opened parallel HDF5 file. This should - improve I/O throughput. The default is not to use this - optimization. - </dl> </dir> |