[svn-r4328] Snapshot version 1.4 release 2 (post0)
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HDF Admin
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HDF5 version 1.4.2 released on Tue Jul 31 17:37:24 CDT 2001
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HDF5 version 1.4.2-post0 released on Sat Aug 11 03:46:29 CDT 2001
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==============================================================================
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INTRODUCTION
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This document describes the differences between HDF5-1.4.1 and
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HDF5-1.4.2, and contains information on the platforms tested and
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known problems in HDF5-1.4.2. For more details check the HISTORY.txt
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This document describes the differences between HDF5-1.4.2 and
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HDF5-1.4.2-post0, and contains information on the platforms tested and
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known problems in HDF5-1.4.2-post0. 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 @@ If you have any questions or comments, please send them to:
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CONTENTS
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- New Features
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- Bug Fixes since HDF5-1.4.1
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- Bug Fixes since HDF5-1.4.2
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- Documentation
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- Platforms Tested
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- Supported Configuration Features
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@@ -36,112 +36,16 @@ CONTENTS
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New Features
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============
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* File sizes greater than 2GB are now supported on Linux systems with
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version 2.4.x or higher kernels.
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* Added a global string variable H5_lib_vers_info_g which holds the
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HDF5 library version information. This can be used to identify
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an hdf5 library or hdf5 application binary.
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Also added a verification of the consistency between H5_lib_vers_info_g
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and other version information in the source code.
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* Parallel HDF5 now runs on the HP V2500 and HP N4000 machines.
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* F90 API:
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- Added aditional parameter "dims" to the h5dread_f/h5dwrite_f and
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h5aread_f/h5awrite_f subroutines. This parameter is a 1-D array
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of size 7 and contains the sizes of the data buffer dimensions.
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This change enables portability between Windows and UNIX platforms.
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In previous versions of the F90 APIs, the data buffer parameters of
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the above functions were declared as assumed-shape arrays, which
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were passed to the C functions by a descriptor. There is no
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portable means, however, of passing descriptors from F90 to C,
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causing portability problems between Windows and UNIX and among
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UNIX platforms. With this change, the data buffers are assumed-
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size arrays, which can be portably passed to the C functions.
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* F90 static library is available on Windows platforms.
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See INSTALL_Windows_withF90.txt for details.
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* F90 APIs are available on HPUX 11.00 and 10.20 and IBM SP platforms.
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* H5 <-> GIF convertor has been added. This is available under
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tools/gifconv. The convertor supports the ability to create animated
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gifs as well.
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* Verified correct operation of library on Solaris 2.8 in both 64-bit and
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32-bit compilation modes. See INSTALL document for instructions on
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compiling the distribution with 64-bit support.
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* Added support for the Metrowerks Code Warrior compiler for Windows.
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* For H4->H5 converter utility, added a new option to choose not to convert
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HDF4 specified attributes(reference number, class) into HDF5 attributes.
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* Added support chunking and compression in SDS and image in H4->H5 converter.
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Currently HDF5 only supports gzip compression, so by default an HDF4 file
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with any other compression method will be converted into an HDF5 file in
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gzip compression.
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* correct the order or reading HDF4 image array in H4->H5 conversion.
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* Added new parallel hdf5 tests in t_mpi. The new test checks if the
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filesystem or the MPI-IO can really handle greater than 2GB files.
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If it fails, it prints information message only without failing the
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test.
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* Added a parallel HDF5 example examples/ph5example.c to illustrate
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the basic way of using parallel HDF5.
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* Added a new public macro, H5_VERS_INFO, which is a string holding
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the HDF5 library version information. This string is also compiled
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into all HDF5 binary code which helps to identify the version information
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of the binary code. One may use the Unix strings command on the binary
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file and looks for the pattern "HDF5 library version".
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* Added new checking in H5check_version() to verify the five HDF5 version
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information macros (H5_VERS_MAJOR, H5_VERS_MINOR, H5_VERS_RELEASE,
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H5_VERS_SUBRELEASE and H5_VERS_INFO) are consistent.
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Bug Fixes since HDF5-1.4.1 Release
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Bug Fixes since HDF5-1.4.2 Release
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==================================
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* Fixed bug with non-zero userblock sizes causing raw data to not
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write correctly.
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* Fixed problems with Pablo build and linking with non-standard MPI I/O.
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* Fixed build on Linux systems with --enable-static-exec flag. It now
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works correctly.
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* IMPORTANT: Fixed file metadata corruption bug which could cause
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metadata data loss in certain situations.
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* The allocation by alignment (H5Pset_alignment) feature code somehow
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got dropped in some 1.3.x version. Re-implemented it with "new and
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improved" algorithm. It keeps track of "wasted" file-fragment in
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the free-list too.
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* Removed limitation that the data transfer buffer size needed to be
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set for datasets whose dimensions were too large for the 'all'
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selection code to handle. Any size dimensioned datasets should be
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handled correctly now.
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* Changed behavior of H5Tget_member_type to correctly emulate HDF5 v1.2.x
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when --enable-hdf5v1_2 configure flag is enabled.
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* Added --enable-linux-lfs flag to allow more control over whether to
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enable or disable large file support on Linux.
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* Fixed various bugs releated to SDS dimensional scale conversions in H4->H5
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converter.
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* Fixed a bug to correctly convert HDF4 objects with fill value into HDF5.
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* Fixed a bug of H5pubconf.h causing repeated definitions if it is included
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more than once. hdf5.h now includes H5public.h which includes
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H5pubconf.h. Applications should #include hdf5.h which handles multiple
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inclusion correctly.
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* Fixed H5FDmpio.h to be C++ friendly by making Parallel HDF5 API's to be
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external to C++.
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* Fixed a bug in H5FD_mpio_flush() that might result in negative file seek
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if both MPIO and Split-file drivers are used together.
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Documentation
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=============
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* The H5T_conv_t and H5T_cdata_t structures are now properly defined
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in the H5Tregister entry in the "H5T" section of the "HDF5 Reference
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Manual" and described in detail in section 12, "Data Conversions," in
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the "Datatypes" chapter of the "HDF5 User's Guide."
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* The new tools h52gif and gif2h5 have been added to the "Tools" section
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of the Reference Manual.
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* A "Freespace Management" section has been added to the "Performance"
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chapter of the User's Guide.
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* Several user-reported bugs have been fixed since Release 1.4.1.
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* The "HDF5 Image and Palette Specification" (in the "HDF5 Application
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Developer's Guide") has been heavily revised. Based on extensive user
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feedback and input from visualization software developers, Version 1.2
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of the image specification is substantially different from prior
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versions.
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Platforms Tested
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