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| author | jhendersonHDF <jhenderson@hdfgroup.org> | 2023-09-01 16:59:28 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-09-01 16:59:28 (GMT) |
| commit | 0b24f40b0fc7728e57a66622bbadc63d88ae181a (patch) | |
| tree | 7e7b37f1a5cc7918204e71701d8475d093996e8d /release_docs/RELEASE.txt | |
| parent | 896270cc6b4f14379f0b9d66c74a538235259225 (diff) | |
| download | hdf5-0b24f40b0fc7728e57a66622bbadc63d88ae181a.zip hdf5-0b24f40b0fc7728e57a66622bbadc63d88ae181a.tar.gz hdf5-0b24f40b0fc7728e57a66622bbadc63d88ae181a.tar.bz2 | |
Fix Subfiling VFD IOC assignment bug (#3456)
Diffstat (limited to 'release_docs/RELEASE.txt')
| -rw-r--r-- | release_docs/RELEASE.txt | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt index 9f8d517..4e32cc7 100644 --- a/release_docs/RELEASE.txt +++ b/release_docs/RELEASE.txt @@ -292,6 +292,19 @@ Bug Fixes since HDF5-1.14.0 release =================================== Library ------- + - Fixed a bug with the way the Subfiling VFD assigns I/O concentrators + + During a file open operation, the Subfiling VFD determines the topology + of the application and uses that to select a subset of MPI ranks that + I/O will be forwarded to, called I/O concentrators. The code for this + had previously assumed that the parallel job launcher application (e.g., + mpirun, srun, etc.) would distribute MPI ranks sequentially among a node + until all processors on that node have been assigned before going on to + the next node. When the launcher application mapped MPI ranks to nodes + in a different fashion, such as round-robin, this could cause the Subfiling + VFD to incorrectly map MPI ranks as I/O concentrators, leading to missing + subfiles. + - Fixed performance regression with some compound type conversions In-place type conversion was introduced for most use cases in 1.14.2. |