diff options
author | Vailin Choi <vchoi@jam.ad.hdfgroup.org> | 2017-10-17 16:48:26 (GMT) |
---|---|---|
committer | Vailin Choi <vchoi@jam.ad.hdfgroup.org> | 2017-10-17 16:50:46 (GMT) |
commit | a7ba8af0d145fee16a758ae4150316c7f2a38263 (patch) | |
tree | 1e904f5bb6ae6413e481f3d4899329e2de91eb58 /release_docs | |
parent | fe70476a225d2e0576149e0f1bdf95689f922c77 (diff) | |
parent | 0c207cd2f84021526690bcbc4e0a8a49ea4cb8a4 (diff) | |
download | hdf5-a7ba8af0d145fee16a758ae4150316c7f2a38263.zip hdf5-a7ba8af0d145fee16a758ae4150316c7f2a38263.tar.gz hdf5-a7ba8af0d145fee16a758ae4150316c7f2a38263.tar.bz2 |
Merge branch 'develop' into bugfix/version_bounds
Diffstat (limited to 'release_docs')
-rw-r--r-- | release_docs/RELEASE.txt | 59 |
1 files changed, 55 insertions, 4 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt index d0de3ee..db3e4e0 100644 --- a/release_docs/RELEASE.txt +++ b/release_docs/RELEASE.txt @@ -62,6 +62,31 @@ New Features Parallel Library: ----------------- + - Optimize parallel open/location of the HDF5 super-block + + 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 + the base offset of the super-block and then broadcast that result + to the remaining ranks in the parallel group. Note that this + approach is utilized ONLY during file opens which employ the MPIO + file driver in HDF5 by previously having called H5Pset_fapl_mpio(). + + HDF5 parallel file operations which do not employ multiple ranks + e.g. specifiying MPI_COMM_SELF (whose MPI_Comm_size == 1) + as opposed to MPI_COMM_WORLD, will not be affected by this + optimization. Conversely, parallel file operations on subgroups + of MPI_COMM_WORLD are allowed to be run in parallel with each + subgroup operating as an independant collection of processes. + + (RAW – 2017/10/10, HDFFV-10294) + + - Large MPI-IO transfers Previous releases of PHDF5 would fail when attempting to @@ -132,7 +157,16 @@ Bug Fixes since HDF5-1.10.1 release Library ------- - - + - H5Zfilter_avail in H5Z.c + + The public function checked for plugins, while the private + function did not. + + Modified H5Zfilter_avail and private function, H5Z_filter_avail. + Moved check for plugin from public to private function. Updated + H5P__set_filter due to change in H5Z_filter_avail. Updated tests. + + (ADB - 2017/10/10, HDFFV-10297) Configuration ------------- @@ -158,6 +192,18 @@ Bug Fixes since HDF5-1.10.1 release ----- - h5repack + h5repack failed to copy a dataset with existing filter. + + Reworked code for h5repack and h5diff code in tools library. Added + improved error handling, cleanup of resources and checks of calls. + Modified H5Zfilter_avail and private function, H5Z_filter_avail. + Moved check for plugin from public to private function. Updated + H5P__set_filter due to change in H5Z_filter_avail. Updated tests. + + (ADB - 2017/10/10, HDFFV-10297) + + - h5repack + h5repack always set the User Defined filter flag to H5Z_FLAG_MANDATORY. Added another parameter to the 'UD=' option to set the flag by default @@ -291,15 +337,20 @@ Supported Platforms Windows 7 Visual Studio 2012 w/ Intel Fortran 15 (cmake) Visual Studio 2013 w/ Intel Fortran 15 (cmake) Visual Studio 2015 w/ Intel Fortran 16 (cmake) - Cygwin(CYGWIN_NT-6.1 2.2.1(0.289/5/3) gcc(4.9.3) compiler and gfortran) - (cmake and autotools) Windows 7 x64 Visual Studio 2012 w/ Intel Fortran 15 (cmake) Visual Studio 2013 w/ Intel Fortran 15 (cmake) Visual Studio 2015 w/ Intel Fortran 16 (cmake) - Visual Studio 2015 w/ Intel Parallel Studio 2017 (cmake) + Visual Studio 2015 w/ Intel C, Fortran 2017 (cmake) + Visual Studio 2015 w/ MSMPI 8 (cmake) + Cygwin(CYGWIN_NT-6.1 2.8.0(0.309/5/3) + gcc and gfortran compilers (GCC 5.4.0) + (cmake and autotools) Windows 10 Visual Studio 2015 w/ Intel Fortran 16 (cmake) + Cygwin(CYGWIN_NT-6.1 2.8.0(0.309/5/3) + gcc and gfortran compilers (GCC 5.4.0) + (cmake and autotools) Windows 10 x64 Visual Studio 2015 w/ Intel Fortran 16 (cmake) |