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* [svn-r24864] Description:Quincey Koziol2014-03-211-18/+25
| | | | | | | | | | | | | | | | | | Remove all traces of MPI-POSIX VFD and GPFS detection/code. Remove remaining traces of stream VFD. Remove testpar/t_posix_compliant test (it's not actually verifying anything). Clean up H5D__mpio_opt_possible() further. Moved environment variable that disables MPI collective operations into MPI-IO VFD (instead of it being in src/H5S.c). A few other small code cleanups. Tested on: Mac OSX/64 10.9.2 (amazon) w/parallel & serial
* [svn-r23713] Description:Quincey Koziol2013-05-211-26/+26
| | | | | | | | | | Clean up warnings, switch library code to use Standard C/POSIX wrapper macros, remove internal calls to API routines, update checkapi and checkposix scripts. Tested on: Mac OSX/64 10.8.3 (amazon) w/C++ & FORTRAN Big-Endian Linux/64 (ostrich)
* [svn-r23165] HDFF-8203 Break H5FDmpi.h header into public and private componentsMohamad Chaarawi2013-01-151-0/+5
| | | | | | https://jira.hdfgroup.uiuc.edu/browse/HDFFV-8203 tested: h5committest
* [svn-r22998] Description:Quincey Koziol2012-11-011-2/+2
| | | | | | | | | | | | | | | | | | | | | | | Clean up warnings and bring changes from Coverity branch back to trunk: r20451: Fixed coverity 810 r20454: Purpose: Fix coverity issue 816 Description: Modified various file drivers to always check the return value from H5P_get_driver_info. r20455: Purpose: Cleanup fix for coverity issue 816 Description: Removed redundant check for "fa" in H5FD_core_open. Tested on: Mac OSX/64 10.8.2 (amazon) w/debug (Too minor to require h5committest)
* [svn-r22681] Description:Quincey Koziol2012-08-151-119/+79
| | | | | | | | Clean up file driver property handling, along with some misc. warnings. Tested on: Mac OSX/64 10.7.4 (amazon) w/debug, gcc 4.7.1, C++, FORTRAN & threadsafe (h5committest upcoming)
* [svn-r22676] Changes needed to make the default free-list mapping from ↵Vailin Choi2012-08-131-1/+1
| | | | H5FD_FLMAP_SINGLE to H5FD_FLMAP_DICHOTOMY.
* [svn-r22115] Add 2 new API routines to set/unset file atomicity for files ↵Mohamad Chaarawi2012-03-211-0/+94
| | | | | | | opened with the MPI-IO VFD Add test cases for these two routines Jira issue HDFFV-7961
* [svn-r21919] Description:Quincey Koziol2012-02-091-66/+36
| | | | | | | | Refactor function name macros and simplify the FUNC_ENTER macros, to clear away the cruft and prepare for further cleanups. Tested on: Mac OSX/64 10.7.3 (amazon) w/debug, production & parallel
* [svn-r21352] Missed stat structure change to use h5_stat_t. Should have been ↵Allen Byrne2011-09-011-1/+1
| | | | part of HDFFV-7687 review and commit. File already used HD prefix on stat function.
* [svn-r20588] Description:Quincey Koziol2011-04-211-6/+5
| | | | | | | | | Clean up code a bit, move new "terminate" VFD callback to new position in H5FD_class_t struct. Tested on: Mac OS X/32 10.6.7 (amazon) w/debug & production (h5committest not required on this branch)
* [svn-r20587] Description:Quincey Koziol2011-04-211-1/+4
| | | | | | | | Initial commit of John Biddescomb's VFD & MPI tweaks. Tested on: None (yet) (h5committest not required for this branch)
* [svn-r19096] Description:Quincey Koziol2010-07-191-0/+2
| | | | | | | | | | | | | | | | | | | | | Bring "round robin" metadata write strategy code from 'round_robin' branch to the trunk. Tested on: FreeBSD/32 6.3 (duty) in debug mode FreeBSD/64 6.3 (liberty) w/C++ & FORTRAN, in debug mode Linux/32 2.6 (jam) w/PGI compilers, w/default API=1.8.x, w/C++ & FORTRAN, w/threadsafe, in debug mode Linux/64-amd64 2.6 (amani) w/Intel compilers, w/default API=1.6.x, w/C++ & FORTRAN, in production mode Solaris/32 2.10 (linew) w/deprecated symbols disabled, w/C++ & FORTRAN, w/szip filter, in production mode Linux/64-ia64 2.6 (cobalt) w/Intel compilers, w/C++ & FORTRAN, in production mode Linux/64-amd64 2.6 (abe) w/parallel, w/FORTRAN, in debug mode Mac OS X/32 10.6.3 (amazon) in debug mode Mac OS X/32 10.6.3 (amazon) w/C++ & FORTRAN, w/threadsafe, in production mode
* [svn-r18702] Description:Quincey Koziol2010-05-051-1/+0
| | | | | | | | | | | | | | | | | | | | | | | Bring r18672 from metadata journaling "merging" branch to trunk: Mostly changes to move to only using one 'user data' parameter for calls to H5AC_protect(), along with some minor reformatting code cleanups. Tested on: FreeBSD/32 6.3 (duty) in debug mode FreeBSD/64 6.3 (liberty) w/C++ & FORTRAN, in debug mode Linux/32 2.6 (jam) w/PGI compilers, w/default API=1.8.x, w/C++ & FORTRAN, w/threadsafe, in debug mode Linux/64-amd64 2.6 (amani) w/Intel compilers, w/default API=1.6.x, w/C++ & FORTRAN, in production mode Solaris/32 2.10 (linew) w/deprecated symbols disabled, w/C++ & FORTRAN, w/szip filter, in production mode Linux/64-ia64 2.6 (cobalt) w/Intel compilers, w/C++ & FORTRAN, in production mode Linux/64-amd64 2.6 (abe) w/parallel, w/FORTRAN, in production mode Mac OS X/32 10.6.3 (amazon) in debug mode Mac OS X/32 10.6.3 (amazon) w/C++ & FORTRAN, w/threadsafe, in production mode
* [svn-r18565] Description:Quincey Koziol2010-04-151-12/+13
| | | | | | | | Minor whitespace and compiler warning cleanups Tested on: Mac OS X/32 10.6.3 (amazon) w/debug (too minor to require h5committest)
* [svn-r16560] Description:Quincey Koziol2009-03-101-1/+1
| | | | | | | | | | Remove another call to H5E_clear_stack() from within the library. Clean up lots of compiler warnings. Tested on: Mac OS X/32 10.5.6 (amazon) (followup on other platforms forthcoming)
* [svn-r15861] Description:Quincey Koziol2008-10-141-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | Various bug fixes & cleanups with VFDs and file free space changes, along with cleaning up compiler warnings. Enable more VFDs (for 'make check-vfd' testing) for many tests. Tested on: Mac OS X/32 10.5.5 (amazon) in debug mode Mac OS X/32 10.5.5 (amazon) w/C++ & FORTRAN, w/threadsafe, in production mode FreeBSD/32 6.3 (duty) in debug mode FreeBSD/64 6.3 (liberty) w/C++ & FORTRAN, in debug mode Linux/32 2.6 (kagiso) w/PGI compilers, w/C++ & FORTRAN, w/threadsafe, in debug mode Linux/64-amd64 2.6 (smirom) w/Intel compilers w/default API=1.6.x, w/C++ & FORTRAN, in production mode Solaris/32 2.10 (linew) w/deprecated symbols disabled, w/C++ & FORTRAN, w/szip filter, in production mode Linux/64-ia64 2.6 (cobalt) w/Intel compilers, w/C++ & FORTRAN, in production mode Linux/64-ia64 2.4 (tg-login3) w/parallel, w/FORTRAN, in production mode Linux/64-amd64 2.6 (abe) w/parallel, w/FORTRAN, in production mode
* [svn-r15800] Description:Quincey Koziol2008-10-071-41/+75
| | | | | | | | | | | | | | | | | | | | | | | Bring file free space branch changes through r15795 into trunk, which includes a fair bit of code cleanup & rearrangement along with a couple of bug fixes also. Tested on: Mac OS X/32 10.5.5 (amazon) in debug mode Mac OS X/32 10.5.5 (amazon) w/C++ & FORTRAN, w/threadsafe, in production mode FreeBSD/32 6.3 (duty) in debug mode FreeBSD/64 6.3 (liberty) w/C++ & FORTRAN, in debug mode Linux/32 2.6 (kagiso) w/PGI compilers, w/C++ & FORTRAN, w/threadsafe, in debug mode Linux/64-amd64 2.6 (smirom) w/Intel compilers w/default API=1.6.x, w/C++ & FORTRAN, in production mode Solaris/32 2.10 (linew) w/deprecated symbols disabled, w/C++ & FORTRAN, w/szip filter, in production mode Linux/64-ia64 2.6 (cobalt) w/Intel compilers, w/C++ & FORTRAN, in production mode Linux/64-ia64 2.4 (tg-login3) w/parallel, w/FORTRAN, in production mode Linux/64-amd64 2.6 (abe) w/parallel, w/FORTRAN, in production mode
* [svn-r15628] Description:Quincey Koziol2008-09-161-21/+21
| | | | | | | | | | | | | Remove trailing whitespace from C/C++ source files, with the following script: foreach f (*.[ch] *.cpp) sed 's/[[:blank:]]*$//' $f > sed.out && mv sed.out $f end Tested on: Mac OS X/32 10.5.5 (amazon) No need for h5committest, just whitespace changes...
* [svn-r15510] Description:Quincey Koziol2008-08-211-9/+9
| | | | | | | | Clean up warnings & formatting Tested on: Mac OS X/32 10.5.4 (amazon) More tests forthcoming
* [svn-r15485] Purpose: Allow library to shut down properly when objects have ↵Neil Fortner2008-08-191-1/+1
| | | | | | | | | | | | | | | | reference count > 1. Description: Added a new field 'app_count' to H5I_id_info_t struct, to track the reference count on an id due to the application. the old 'count' field tracks the total. Generally any id visible to the application gets placed in app_count. Added app_ref boolean parameter to H5I_inc_ref, H5I_dec_ref, H5I_register, H5I_clear_type, and a few other functions, to specify whether the operation(s) being performed on the id(s) are due to the application (TRUE) or not (FALSE). Test added for this case. Tested: kagiso, smirom, linew (h5committest)
* [svn-r14903] Undoing change committed in r14902.Scot Breitenfeld2008-04-301-127/+61
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* [svn-r14902] Merged fortran_1_8 branch changes r14505:14901 into the trunk. ↵Scot Breitenfeld2008-04-301-61/+127
| | | | New fortran wrappers added.
* [svn-r14860] Description:Quincey Koziol2008-04-241-127/+61
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Omnibus raw data I/O revisions, with wide-ranging changes and refactoring, in order to prepare for implementing "fast append" feature. These changes remove the majority of the code duplication for raw data I/O which has crept in over the last ten years and introduces a more object- oriented design for operating on different types of dataset storage. Chunked storage no longer has it's own I/O routines, it is now handled as either contiguous (if chunk is not pulled into the cache) or compact (if the chunk is cached in memory). No bug or feature changes, at least intentionally... :-) Tested on: FreeBSD/32 6.2 (duty) in debug mode FreeBSD/64 6.2 (liberty) w/C++ & FORTRAN, in debug mode Linux/32 2.6 (kagiso) w/PGI compilers, w/C++ & FORTRAN, w/threadsafe, in debug mode Linux/64-amd64 2.6 (smirom) w/default API=1.6.x, w/C++ & FORTRAN, in production mode Linux/64-ia64 2.6 (cobalt) w/Intel compilers, w/C++ & FORTRAN, in production mode Solaris/32 2.10 (linew) w/deprecated symbols disabled, w/C++ & FORTRAN, w/szip filter, in production mode Mac OS X/32 10.5.2 (amazon) in debug mode Linux/64-ia64 2.4 (tg-login3) w/parallel, w/FORTRAN, in production mode
* [svn-r14306] Description:Quincey Koziol2007-11-291-51/+44
| | | | | | | | Add call to reset cached chunk info after initialization of chunk data storage. Tested on: Linux/64 2.4(smirom) w/parallel
* [svn-r13829] Some systems (only SGI Altix ProPack 4 discovered so far) ↵Raymond Lu2007-06-021-2/+14
| | | | | | | | | | | | doesn't return correct file size from MPI_File_get_size. Bypass this problem by replacing it with stat. Add an option --disable-mpi-size in configure to indicate this function doesn't work properly. Add a test in testpar/t_mpi.c, too. If it returns wrong file size, print out a warning. Tested on kagiso (parallel) because already tested the same change to v1.6 on several platforms (kagiso, cobalt, copper, and sol).
* [svn-r13475] There's a configure issue linking szip's shared libraries when ↵Mike McGreevy2007-03-081-0/+2
| | | | | | | | | | | | running on kagiso. The static szip libraries are working as intended, but when shared szip libraries are present and intended for use they cannot be opened. A check has been implemented to test if shared szip libraries are functional on current platform. If they are not, and the user is trying to use them, szip is now disbaled and the user is informed. This issue occurs on kagiso, and the resolution was tested on kagiso.
* [svn-r13253] Updated all C and C++ style source code files with the THG ↵Albert Cheng2007-02-071-2/+3
| | | | | | | | | copyright notice. Tested platform: Kagiso only since it is only a comment block change. If it works in one machine, it should work in all, I hope. Still need to check the parallel build on copper.
* [svn-r13139] Fixed the MULTI problem (Bug #731) that corrupted the data. ↵Raymond Lu2007-01-121-4/+10
| | | | | | | The problem came from the EOA for the whole MULTI file. It's taken out because it's meaningless for MULTI file. Instead, each individual file has its EOA.
* [svn-r13068] Ran bin/reconfigure. Some of the scripts have been changed or ↵James Laird2006-12-181-6/+6
| | | | | | | | | haven't been run in a while, so many of the source files were updated with tracing macros, etc. No code changes by me. Tested on kagiso and smirom.
* [svn-r12553] This check-in includes the following part of parallel ↵MuQun Yang2006-08-091-20/+127
| | | | | | | | | | | | | | | optimization codes: 1. Provide another option for users to do independent IO with MPI file setview(collectively) 2. With the request of collective IO from users, using Independent IO with MPI file setview if we find collective IO is not good for the applications for IO per chunk(multi-chunk IO) case. Previously we used pure independent IO and that actually performed small IO(IO each row) for this case. The recent performance study suggested the independent IO with file setview can acheieve significantly better performance than collective IO when not many processes participate in the IO. 3. For applications that explicitly choose to do collective IO per chunk case, the library won't do any optimization(gather/broadcast) operations. The library simply passes the collective IO request to MPI-IO. Tested at copper, kagiso, heping, mir and tungsten(cmpi and mpich) Kagiso is using LAM, t_mpi test was broken even. The cchunk10 test failed at heping and mir. I suspected it was an MPICH problem. Will investigate later. Everything passed at copper. at tungsten: the old cmpi bug(failed at esetw) is still there. Other tests passed. Some sequential fheap tests failed at kagiso.
* [svn-r12440] Purpose:Quincey Koziol2006-06-271-18/+18
| | | | | | | | | | | Code cleanup Description: Trim trailing whitespace in Makefile.am and C/C++ source files to make diffing changes easier. Platforms tested: None necessary, whitespace only change
* [svn-r12133] Purpose:Quincey Koziol2006-03-221-2/+2
| | | | | | | | | | | Code cleanup Description: Update a couple of files that bin/reconfigure rearranged for me... :-) Platforms tested: FreeBSD 4.11 (sleipnir) Too minor to require h5committest
* [svn-r12090] Purpose:MuQun Yang2006-03-141-0/+146
| | | | | | | | | | | | | | | | | | | New APIs to add for collective chunk IO Description: Three new APIs H5Pset_dxpl_mpio_chunk_opt_ratio H5Pset_dxpl_mpio_chunk_opt_num H5Pset_dxpl_mpio_chunk_opt for optional optimization choices from users. Solution: Haven't added tests yet, won't affect other parts of the library. Will add tests after urgent investigations of memory leaking problems from NASA Aura team. Platforms tested: heping: both parallel and sequential shanti Misc. update:
* [svn-r11470] Purpose:John Mainzer2005-09-271-10/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Repair synchronization bug in the metadata cache in PHDF5 Also repair numerous other bugs that surfaced in testing the bug fix. Description: While operations modifying metadata must be collective, we allow independant reads. This allows metadata caches on different processes to adjust to different sizes, and to place the entries on their dirty lists in different orders. Since only process 0 actually writes metadata to disk (all other processes thought they did, but the writes were discarded on the theory that they had to be collective), this made it possible for another process to modify metadata, flush it, and then read it back in in its original form (pre-modification) form. The possibilities for file corruption should be obvious. Solution: Make the policy that only process 0 can write to file explicit, and visible to the metadata caches. Thus only process 0 may flush dirty entries -- all other caches must retain dirty entries until they are informed by process 0 that the entries are clean. Synchronization is handled by counting the bytes of dirty cache entries created, and then synching up between the caches whenever the sum exceeds an (eventually user specified) limit. Dirty metadata creation is consistent across all processes because all operations modifying metadata must be collective. This change uncovered may bugs which are repaired in this checkin. It also required modification of H5HL and H5O to allocate file space on insertion rather than on flush from cache. Platforms tested: H5committest, heping(parallel & serial) Misc. update:
* [svn-r11245] Purpose:Quincey Koziol2005-08-131-27/+27
| | | | | | | | | | | | | | | | | | | | Code cleanup Description: Trim trailing whitespace, which is making 'diff'ing the two branches difficult. Solution: Ran this script in each directory: foreach f (*.[ch] *.cpp) sed 's/[[:blank:]]*$//' $f > sed.out && mv sed.out $f end Platforms tested: FreeBSD 4.11 (sleipnir) Too minor to require h5committest
* [svn-r10628] Purpose:Quincey Koziol2005-04-181-6/+6
| | | | | | | | | | | Code cleanup Description: Clean up various warnings reported by the Windows team. Platforms tested: FreeBSD 4.11 (sleipnir) Too minor to require h5committest
* [svn-r9857] Purpose: MaintenanceElena Pourmal2005-01-221-3/+0
| | | | | | | | | | | | | | Description: Removed PABLO from the source Solution: Platforms tested: arabica with 64-bit, copper with parallel, heping with GNU C and C++ and PGI fortran (but I disabled hl, there is some weird problem only on heping: F9XMODFLAG is not propagated to the Makefile files Misc. update:
* [svn-r8981] Purpose:Quincey Koziol2004-08-021-0/+1
| | | | | | | | | | | | | Code cleanup Description: Various minor tweaks to clean code up and bring it into closer syncronization with the release branch. Platforms tested: FreeBSD 4.10 (sleipnir) w/parallel h5committested IRIX64 6.5 (modi4)
* [svn-r8731] Purpose:Quincey Koziol2004-06-231-3/+24
| | | | | | | | | | | | | | | Code cleanup & minor optimization Description: Re-work the way interface initialization routines are specified in the library to avoid the overhead of checking for them in routines where there is no interface initialization routine. This cleans up warnings with gcc 3.4, reduces the library binary size a bit (about 2-3%) and should speedup the library's execution slightly. Platforms tested: FreeBSD 4.10 (sleipnir) w/gcc34 h5committest
* [svn-r8383] Purpose:Quincey Koziol2004-04-181-1/+1
| | | | | | | | | | | | | Code cleanup Description: Clean up lots of warnings based on those reported from the SGI compilers as well as gcc. Platforms tested: SGI O3900, IRIX64 6.5 (Cheryl's SGI machine) FreeBSD 4.9 (sleipnir) w/ & w/o parallel h5committest
* [svn-r8272] Purpose:Albert Cheng2004-03-231-2/+1
| | | | | | | | | | | | | | | | bug fix. Description: H5FD_mpio_init was calling the public API version of H5Iget_type() which would clear the error stack, thus cleared away error messages prematurely. Solution: Changed it to call the private version of H5I_get_type() which does not clear the error stack. Platforms tested: o2 (SGI) parallel.
* [svn-r8144] Purpose:Quincey Koziol2004-02-021-64/+18
| | | | | | | | | | | | | | | | | | | | | | | | Bug fix. Description: Revert the optimization to the MPI-I/O VFD from earlier this week that eliminated calling MPI_File_set_size() when a file was truncated. This doesn't work because of the way we track the 'eoa' (end of allocated space) in the file: we just advance the eoa value when space is allocated in the file and we don't zero out the space in the file. This causes a problem where we assume that all "newly allocated" space in the file contains zero bytes, but if we don't call MPI_File_set_size(), the file can contain the previous data (if the file previously existed) and not zeros. Unfortunately, because we allow independent raw data parallel I/O, there is no way to address this issue. :-( Solution: Revert to previous method of retrieving the file's size, etc. from before the optimization. Platforms tested: FreeBSD 4.9 (sleipnir) w/parallel too minor to require h5committest.
* [svn-r8140] Purpose:Quincey Koziol2004-02-011-1/+1
| | | | | | | | | | | | Bug fix Description: Move assertion to allow closing non-HDF5 files with the MPI-I/O VFD to work correctly again. Platforms tested: FreeBSD 4.9 (sleipnir) h5committest
* [svn-r8134] Purpose:Quincey Koziol2004-01-311-0/+26
| | | | | | | | | | | | | | | | Code cleanup Description: Add destructor to match constructor fr VFLs when they are shut down by the library. Solution: Added H5FD_*_term() routines to "undo" changes made in H5FD_*_init() routines. Platforms tested: IBM p690 (copper) too minor to require h5committest
* [svn-r8126] Purpose:Quincey Koziol2004-01-311-566/+176
| | | | | | | | | | | | | | | | | Bug fix/optimization Description: Address slowdown in MPI-I/O file metadata operations that was introduced mid-stream. We now _require_ a POSIX compliant parallel file system for the MPI-I/O file driver (as well as for the MPI-POSIX file driver). Also optimized file open operation when the file is being created by reducing the number of collective & syncronizing calls. Additionally, refactor the MPI routines into a common place, eliminating duplicated code. Platforms tested: FreeBSD 4.9 (sleipnir) w/parallel h5committest
* [svn-r8038] Purpose:Quincey Koziol2004-01-081-2/+2
| | | | | | | | | | | | | | | | | | | | Bug fix Description: When two property lists are compared, the H5Pequal routine was just comparing the raw information for the property values. This causes problems when the raw information contains pointers to other information. Solution: Allow a 'compare' callback to be registered for properties, so that a user application get perform the comparison itself, allowing for "deep" compares of the property value. This was exported to the H5Pregister & H5Pinsert routines in the development branch, but not the release branch. Platforms tested: FreeBSD 4.9 (sleipnir) h5committest
* [svn-r7993] Purpose:Quincey Koziol2003-12-291-5/+13
| | | | | | | | | | | | Code cleanup, bug fixes Description: Wrap up rest of changes necessary for fixing the "short" MPI-I/O read problem that Robb reported. Platforms tested: FreeBSD 4.9 (sleipnir) too minor to require h5committest
* [svn-r7978] Purpose:Albert Cheng2003-12-251-127/+61
| | | | | | | | | | | | | | | | | | | | | | | | Bug fix Description: MPIO driver did not detect partial read or write. It assumed if read completed, all bytes requested are read. Therefore, if a dataset was not completely written yet, the unread part will not be filled with default fill value. Solution: Added the MPI_Get_elements call to find exactly how many bytes are read (or written). For read case, if not enough is read, the rest is padded with zeros. For write case, it is an error if not able to write them all in first attempt. (It is not always possible to repeat write for MPIO since file-view may be changed, collective would hang, etc. So, we do just one attempt.) Platforms tested: eirene (pp). Should work for other platforms since these have been tested in v1.6. Misc. update:
* [svn-r7917] Purpose:Quincey Koziol2003-12-061-2/+2
| | | | | | | | | | | | | | | | | | | Code cleanup Description: Clean up compiler warnings, especially the 'FUNC' variable not used which comes out in production mode. Solution: Had to add a new FUNC_ENTER_NOAPI_NOINIT_NOFUNC macro for those non-API functions which don't need the 'FUNC' variable defined. (This will be _so_ much easier when C99 is standard on all our supposed platforms, since it has a __FUNC__ macro... ) Platforms tested: FreeBSD 4.9 (sleipnir) too minor for h5committest (although there were lots of files changed, the change was minor in each one)
* [svn-r7860] Purpose:Quincey Koziol2003-11-201-0/+21
| | | | | | | | | | | | | | | | | Bug fix Description: Our previous "optimization" of metadata writing which only wrote metadata from one process was abusing MPI-I/O and after some consultation with Rob Ross and Rajeev Thakur, Albert & I have come up with a solution... Solution: Instead of only writing from one process, issue a collective write operation with all processes, for metadata writes. Platforms tested: FreeBSD 4.9 (sleipnir) h5committest
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