diff options
Diffstat (limited to 'release_docs/RELEASE.txt')
| -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 |