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authorQuincey Koziol <koziol@hdfgroup.org>2004-01-31 01:38:44 (GMT)
committerQuincey Koziol <koziol@hdfgroup.org>2004-01-31 01:38:44 (GMT)
commit138bc92ebdb7c6e1ad379dcdabae21bf0a79ab0d (patch)
tree046bd488f60127ac3a6ba0edbd482b44f022c788 /doc/html
parentf499912c3247e592a0eeef7207b917428756b094 (diff)
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[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')
-rw-r--r--doc/html/Environment.html11
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>
&nbsp;&nbsp;(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>
- &nbsp;&nbsp;(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>