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| author | Richard Warren <Richard.Warren@hdfgroup.org> | 2017-10-11 20:22:50 (GMT) |
|---|---|---|
| committer | Richard Warren <Richard.Warren@hdfgroup.org> | 2017-10-11 20:22:50 (GMT) |
| commit | 3dde6d0e32461f46630f814a2fdfbd4c813703bf (patch) | |
| tree | 94b0665603ce38ed64a995e1cdb18d0e0dc53b65 /release_docs | |
| parent | 157398107e334e3dafbdcd25f34da391510e45f2 (diff) | |
| download | hdf5-3dde6d0e32461f46630f814a2fdfbd4c813703bf.zip hdf5-3dde6d0e32461f46630f814a2fdfbd4c813703bf.tar.gz hdf5-3dde6d0e32461f46630f814a2fdfbd4c813703bf.tar.bz2 | |
Updated the code and RELEASE.txt note per comments from John Mainzer
Diffstat (limited to 'release_docs')
| -rw-r--r-- | release_docs/RELEASE.txt | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt index ed1b6cc..e561983 100644 --- a/release_docs/RELEASE.txt +++ b/release_docs/RELEASE.txt @@ -64,11 +64,11 @@ New Features ----------------- - Optimize parallel open/location of the HDF5 super-block - Previous releases of PHDF5 allow all parallel ranks to - read the starting elements in a file to validate and process - the HDF5 super-block. As this is accomplished more or less as - a synchronous operation, a large number of processes will - likely experience a slowdown due to filesystem contention. + Previous releases of PHDF5 required all parallel ranks to + search for the HDF5 superblock signature when opening the + file. As this is accomplished more or less as a synchronous + operation, a large number of processes can experience a + slowdown in the file open due to filesystem contention. As a first step in improving the startup/file-open performance, we allow MPI rank 0 of the associated MPI communicator to locate |