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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 ba0edba..0c35f11 100644 --- a/release_docs/RELEASE.txt +++ b/release_docs/RELEASE.txt @@ -109,6 +109,19 @@ Bug Fixes since HDF5-1.14.2 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 a file space allocation bug in the parallel library for chunked datasets |