[svn-r8205] Snapshot version 1.6 release 2 (post0)
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HDF Admin
@@ -1,12 +1,12 @@
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HDF5 version 1.6.2 released on Thu Feb 12 14:18:13 CST 2004
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HDF5 version 1.6.2-post0 released on Sun Feb 15 20:53:53 CST 2004
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================================================================================
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INTRODUCTION
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This document describes the differences between HDF5-1.6.1 and
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HDF5-1.6.2, and contains information on the platforms tested and
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known problems in HDF5-1.6.2. For more details check the HISTORY.txt
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This document describes the differences between HDF5-1.6.2 and
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HDF5-1.6.2-*, and contains information on the platforms tested and
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known problems in HDF5-1.6.2-*. For more details check the HISTORY.txt
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file in the HDF5 source.
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The HDF5 documentation can be found on the NCSA ftp server
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@@ -26,7 +26,7 @@ CONTENTS
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- New Features
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- Support for new platforms and languages
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- Bug Fixes since HDF5-1.6.1
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- Bug Fixes since HDF5-1.6.2
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- Documentation
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- Platforms Tested
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- Supported Configuration Features Summary
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@@ -38,33 +38,15 @@ New Features
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Configuration:
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--------------
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- Default of $prefix is changed to $PWD/hdf5 so that multiple
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builds using --srcdir is possible in the same machine.
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AKC - 2003/12/1
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Library:
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--------
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- Added H5Iget_ref, H5Iinc_ref and H5Idec_ref routines to the C
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library and the FORTRAN wrapper. See the reference manual for a
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full description of these new routines. QAK - 2003/12/11
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Parallel Library:
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-----------------
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- The parallel tests in testpar/ now provides different levels of
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verbosity via the '-v' option. The default is less verbose
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than before. AKC - 2004/01/23
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- Added parallel test, test_mpio_1wMr, which tests if the
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underlaying parallel I/O system is conforming to the POSIX
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write/read requirement. This version includes options of using
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atomicity and file-sync. AKC - 2003/11/27
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Tools:
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------
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- Added option -showconfig to compiler tools (h5cc,h5fc,h5c++).
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AKC - 2004/01/08
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- Install the "h5cc" and "h5fc" tools as "h5pcc" and "h5pfc"
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respectively if library is built in parallel mode. AKC - 2004/01/07
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- Added metadata benchmark (perform/perf_meta). SLU - 2003/10/03
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C++ API:
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--------
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@@ -72,88 +54,21 @@ New Features
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Support for new platforms, languages and compilers.
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=======================================
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- HDF5 Fortran APIs are supported on MAC OSX with IBM XL Fortran compiler
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version 8.1 Beta
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Use --disbale-shared --enable-static flags with configure when
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building HDF5 Fortran Library on MAC OSX.
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- C and C++ Libraries are available for Linux64 RH8
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- C, C++ and Fortran sequential Libraries, and C and Fortran parallel
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Libraries are available for Altix (Linux ia64)
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Bug Fixes since HDF5-1.6.1 release
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Bug Fixes since HDF5-1.6.2 release
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==================================
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Library
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-------
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- Fixed problem with H5Tget_native_type() not handling opaque fields
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correctly. QAK - 2004/01/31
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- Fixed several errors in B-tree deletion code which could cause a
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B-tree (used with groups and chunked datasets) to become corrupt
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with the right sequence of deleted objects. QAK - 2004/01/19
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- Fixed small internal memory leaks of fill-value information.
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QAK - 2004/01/13
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- Fixed bug that caused variable-length datatypes (strings or sequences)
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used for datasets in files with objects that were unlinked to
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fail to be read/written to a file. QAK - 2004/01/13
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- Detect situation where szip 'pixels per block' is larger than the
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fastest changing dimension of a dataset's chunk size and disallow
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this (due to limits in szip library). QAK - 2003/12/31
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- Fixed bug with flattened hyperslab selections that would generate
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incorrect hyperslab information with certain high-dimensionality
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combinations of start/stride/count/block information.
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QAK - 2003/12/31
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- Fixed bug with variable-length datatypes used in compound datatypes.
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SLU - 2003/12/29
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- Fixed bug in parallel I/O routines that would cause reads from
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"short datasets" (datasets which were only partially written out)
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to return invalid data. QAK & AKC - 2003/12/19
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- Fixed bug where scalar dataspaces for attributes were reporting as
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simple dataspaces. QAK - 2003/12/13
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- Fixed problem with selection offsets of hyperslab selections in
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chunked datasets causing the library to go into an infinite loop.
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QAK - 2003/12/13
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- Fixed H5Giterate to avoid re-using index parameter after iteration
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callback has been called (allows iteration callback to modify the
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index parameter itself). QAK - 2003/12/06
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- Fixed various floating-point conversion problems, including a
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change which could corrupt data when converting from double->float.
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QAK - 2003/11/24
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- Changed "single process" metadata writing in library to collective
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I/O by all processes, in order to guarantee correct data being
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written with MPI-I/O. QAK - 2003/11/20
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- Fixed problems with fill values and variable-length types and also
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I/O on VL values that were set to NULL. QAK - 2003/11/08
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- Fixed problems with MPI datatypes that caused ASCI Q machine to
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hang. QAK - 2003/10/28
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- Removed HDF5_MPI_PREFER_DERIVED_TYPES environment variable support,
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since it had no benefit. QAK - 2003/10/28
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- Single hyperslab selections (which were set with only one call to
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H5Sselect_hyperslab) that had dimensions that could be "flattened"
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but were interspersed with dimensions that could not be flattened
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were not correctly handled, causing core dumps. QAK - 2003/10/25
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- Avoid metadata cache from preempting current dataset object header
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when looking up information about the named datatype that the
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dataset uses. QAK - 2003/10/20
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Configuration
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-------------
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- Parallel I/O with the MPI-I/O driver will no longer work if the
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filesystem is not POSIX compliant. The "HDF5_MPI_1_METAWRITE"
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environment variable has been removed. QAK - 2004/01/30
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Performance
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-------------
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- More optimizations to inner loops of datatype conversions for
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integers and floats which give a 10-50% speedup. QAK - 2003/11/07
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- Hoisted invariant 'if/else's out of inner datatype conversion loop for
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integer and floating-point values, giving about a 20% speedup.
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QAK - 2003/10/20
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Tools
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-----
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- Fixed h5redeploy which sometimes complain too many argument for the
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test command. (The complain did not hinder the h5redploy to proceed
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correctly.) AKC - 2003/11/03
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Documentation
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-------------
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@@ -429,7 +344,3 @@ Known Problems
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If -ieee is not used, the converted double values are mostly 0.0 but
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occassionaly as 1**-308. This has been reported to the system staff.
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All other tests have passed.
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* On AIX 5.1 when 64-bit parallel C Library is built with zlib configured in,
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compilation fails for H5Zdeflate.c. To bypass the problem, remove "const"
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definition in front of H5Z_DEFLATE in H5Zpkg.h line 29.
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