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| author | jhendersonHDF <jhenderson@hdfgroup.org> | 2022-08-09 23:05:37 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-08-09 23:05:37 (GMT) |
| commit | ef33ac8bac5fd201b41d1a3084f03834f47729a2 (patch) | |
| tree | ad4756b872abff6d16f11d9a6c6c949e8f359cad /release_docs/RELEASE.txt | |
| parent | b84241e57a97309b15846da4cc74611a66d92f6d (diff) | |
| download | hdf5-ef33ac8bac5fd201b41d1a3084f03834f47729a2.zip hdf5-ef33ac8bac5fd201b41d1a3084f03834f47729a2.tar.gz hdf5-ef33ac8bac5fd201b41d1a3084f03834f47729a2.tar.bz2 | |
Subfiling VFD - tidying up and fixing a few new testing failures (#1977)
* Rename Subfiling IOC "thread_pool_count" field to "thread_pool_size"
* Add simple HDF5 example for Subfiling VFD
* Subfiling VFD - never cache app topology as it may change
* Subfiling VFD - cleanup unused funtionality and tidy up some TODOs
* Subfiling VFD - tidy up subfiling error handling in H5subfiling_common.c
* Subfiling VFD - show number of failed I/O requests on close
* Subfiling VFD - Update file cmp callback after switching to MPI I/O VFD
* Amend RELEASE.txt with info about h5fuse.sh and Subfiling limitations
* Subfiling VFD - switch to using H5_basename and H5_dirname
Diffstat (limited to 'release_docs/RELEASE.txt')
| -rw-r--r-- | release_docs/RELEASE.txt | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt index ab43011..c7b41cd 100644 --- a/release_docs/RELEASE.txt +++ b/release_docs/RELEASE.txt @@ -103,8 +103,25 @@ New Features while also minimizing the locking issues of the single shared file approach on a parallel file system. + Also included with the Subfiling VFD is a new h5fuse.sh script which + reads a Subfiling configuration file and then combines the various + sub-files back into a single HDF5 file. By default, the h5fuse.sh script + looks in the current directory for the Subfiling configuration file, + but can also be pointed to the configuration file with a command-line + option. + The Subfiling VFD can be used by calling H5Pset_fapl_subfiling() on a - File Access Property List and using that FAPL for file operations. + File Access Property List and using that FAPL for file operations. Note + that the Subfiling VFD currently has the following limitations: + + * Does not currently support HDF5 collective I/O, other than collective + metadata writes and reads as set by H5Pset_coll_metadata_write() and + H5Pset_all_coll_metadata_ops() + + * The Subfiling VFD should not currently be used with an HDF5 library + that has been built with thread-safety enabled. This can cause deadlocks + when failures occur due to interactions between the VFD's internal + threads and HDF5's global lock. (JTH - 2022/07/22) |