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HDF5 version 1.12.1-4 currently under development
================================================================================
INTRODUCTION
This document describes the new features introduced in the HDF5 1.12.0 release.
It contains information on the platforms tested and known problems in this
release. For more details check the HISTORY*.txt files in the HDF5 source.
Note that documentation in the links below will be updated at the time of the
release.
Links to HDF5 documentation can be found on The HDF5 web page:
https://portal.hdfgroup.org/display/HDF5/HDF5
The official HDF5 releases can be obtained from:
https://www.hdfgroup.org/downloads/hdf5/
More information about the new features can be found at:
https://portal.hdfgroup.org/display/HDF5/New+Features+in+HDF5+Release+1.12
If you have any questions or comments, please send them to the HDF Help Desk:
help@hdfgroup.org
CONTENTS
========
- New Features
- Support for new platforms and languages
- Bug Fixes since HDF5-1.12.0-alpha1
- Supported Platforms
- Tested Configuration Features Summary
- More Tested Platforms
- Known Problems
- CMake vs. Autotools installations
New Features
============
Configuration:
-------------
- CMake option to build the HDF filter plugins project as an external project
The HDF filter plugins project is a collection of registered compression
filters that can be dynamically loaded when needed to access data stored
in a hdf5 file. This CMake-only option allows the plugins to be built and
distributed with the hdf5 library and tools. Like the options for szip and
zlib, either a tgz file or a git repository can be specified for the source.
The option was refactored to use the CMake FetchContent process. This allows
more control over the filter targets, but required external project command
options to be moved to a CMake include file, HDF5PluginCache.cmake. Also
enabled the filter examples to be used as tests for operation of the
filter plugins.
(ADB - 2020/12/10, OESS-98)
- Autotools and CMake target added to produce doxygen generated documentation
The default is OFF or disabled.
Autoconf option is '--enable-doxygen'
autotools make target is 'doxygen' and will build all doxygen targets
CMake configure option is 'HDF5_BUILD_DOC'.
CMake target is 'doxygen' for all available doxygen targets
CMake target is 'hdf5lib_doc' for the src subdirectory
(ADB - 2020/11/13)
- CMake option to use MSVC naming conventions with MinGW
HDF5_MSVC_NAMING_CONVENTION option enable to use MSVC naming conventions
when using a MinGW toolchain
(xan - 2020/10/30)
- CMake option to statically link gcc libs with MinGW
HDF5_MINGW_STATIC_GCC_LIBS allows to statically link libg/libstdc++
with the MinGW toolchain
(xan - 2020/10/30)
- CMake option to build the HDF filter plugins project as an external project
The HDF filter plugins project is a collection of registered compression
filters that can be dynamically loaded when needed to access data stored
in a hdf5 file. This CMake-only option allows the plugins to be built and
distributed with the hdf5 library and tools. Like the options for szip and
zlib, either a tgz file or a git repository can be specified for the source.
The necessary options are (see the INSTALL_CMake.txt file):
HDF5_ENABLE_PLUGIN_SUPPORT
PLUGIN_TGZ_NAME or PLUGIN_GIT_URL
There are more options necessary for various filters and the plugin project
documents should be referenced.
(ADB - 2020/10/16, OESS-98)
- Added CMake option to format source files
HDF5_ENABLE_FORMATTERS option will enable creation of targets using the
pattern - HDF5_*_SRC_FORMAT - where * corresponds to the source folder
or tool folder. All sources can be formatted by executing the format target;
make format
(ADB - 2020/09/24)
- CMake option to link the generated Fortran MOD files into the include
directory.
The Fortran generation of MOD files by a Fortran compile can produce
different binary files between SHARED and STATIC compiles with different
compilers and/or different platforms. Note that it has been found that
different versions of Fortran compilers will produce incompatible MOD
files. Currently, CMake will locate these MOD files in subfolders of
the include directory and add that path to the Fortran library target
in the CMake config file, which can be used by the CMake find library
process. For other build systems using the binary from a CMake install,
a new CMake configuration can be used to copy the pre-chosen version
of the Fortran MOD files into the install include directory.
The default will depend on the configuration of
BUILD_STATIC_LIBS and BUILD_SHARED_LIBS:
YES YES Default to SHARED
YES NO Default to STATIC
NO YES Default to SHARED
NO NO Default to SHARED
The defaults can be overriden by setting the config option
HDF5_INSTALL_MOD_FORTRAN to one of NO, SHARED, or STATIC
(ADB - 2020/07/09, HDFFV-11116)
- CMake option to use AEC (open source SZip) library instead of SZip
The open source AEC library is a replacement library for SZip. In
order to use it for hdf5 the libaec CMake source was changed to add
"-fPIC" and exclude test files. Autotools does not build the
compression libraries within hdf5 builds. New option USE_LIBAEC is
required to compensate for the different files produced by AEC build.
(ADB - 2020/04/22, OESS-65)
- CMake ConfigureChecks.cmake file now uses CHECK_STRUCT_HAS_MEMBER
Some handcrafted tests in HDFTests.c has been removed and the CMake
CHECK_STRUCT_HAS_MEMBER module has been used.
(ADB - 2020/03/24, TRILAB-24)
- Both build systems use same set of warnings flags
GNU C, C++ and gfortran warnings flags were moved to files in a config
sub-folder named gnu-warnings. Flags that only are available for a specific
version of the compiler are in files named with that version.
Clang C warnings flags were moved to files in a config sub-folder
named clang-warnings.
Intel C, Fortran warnings flags were moved to files in a config sub-folder
named intel-warnings.
There are flags in named "error-xxx" files with warnings that may
be promoted to errors. Some source files may still need fixes.
There are also pairs of files named "developer-xxx" and "no-developer-xxx"
that are chosen by the CMake option:HDF5_ENABLE_DEV_WARNINGS or the
configure option:--enable-developer-warnings.
In addition, CMake no longer applies these warnings for examples.
(ADB - 2020/03/24, TRILAB-192)
Library:
--------
- Added H5VL_VERSION macro that indicates the version of the VOL framework
implemented by a version of the library. Currently, compatibility
checking enforces that the 'version' field in the H5VL_class_t for
a VOL connector must match the version of the VOL framework for the
library when it is registered or dynamically loaded.
(QAK - 2020/12/10)
- Added two new API routines for tracking library memory use:
H5get_alloc_stats() and H5get_free_list_sizes().
(QAK - 2020/03/25)
Java Library:
----------------
- Added new H5S functions.
H5Sselect_copy, H5Sselect_shape_same, H5Sselect_adjust,
H5Sselect_intersect_block, H5Sselect_project_intersection,
H5Scombine_hyperslab, H5Smodify_select, H5Scombine_select
wrapper functions added.
(ADB - 2020/10/27, HDFFV-10868)
Tools:
------
- h5repack added options to control how external links are handled.
Currently h5repack preserves external links and cannot copy and merge
data from the external files. Two options, merge and prune, were added to
control how to merge data from an external link into the resulting file.
--merge Follow external soft link recursively and merge data.
--prune Do not follow external soft links and remove link.
--merge --prune Follow external link, merge data and remove dangling link.
(ADB - 2020/08/05, HDFFV-9984)
Support for new platforms, languages and compilers.
=======================================
-
Bug Fixes since HDF5-1.12.0 release
==================================
Library
-------
- Fix bug and simplify collective metadata write operation when some ranks
have no entries to contribute. This fixes parallel regression test
failures with IBM SpectrumScale MPI on the Summit system at ORNL.
(QAK - 2020/09/02)
- Avoid setting up complex MPI types with 0-length vectors, which some
MPI implementations don't handle well. (In particular, IBM
SpectrumScale MPI on the Summit system at ORNL)
(QAK - 2020/08/21)
- Explicitly declared dlopen to use RTLD_LOCAL
dlopen documentation states that if neither RTLD_GLOBAL nor
RTLD_LOCAL are specified, then the default behavior is unspecified.
The default on linux is usually RTLD_LOCAL while macos will default
to RTLD_GLOBAL.
(ADB - 2020/08/12, HDFFV-11127)
- H5Sset_extent_none() sets the dataspace class to H5S_NO_CLASS which
causes asserts/errors when passed to other dataspace API calls.
H5S_NO_CLASS is an internal class value that should not have been
exposed via a public API call.
In debug builds of the library, this can cause asserts to trip. In
non-debug builds, it will produce normal library errors.
The new library behavior is for H5Sset_extent_none() to convert
the dataspace into one of type H5S_NULL, which is better handled
by the library and easier for developers to reason about.
(DER - 2020/07/27, HDFFV-11027)
- Fixed the segmentation fault when reading attributes with multiple threads
It was reported that the reading of attributes with variable length string
datatype will crash with segmentation fault particularly when the number of
threads is high (>16 threads). The problem was due to the file pointer that
was set in the variable length string datatype for the attribute. That file
pointer was already closed when the attribute was accessed.
The problem was fixed by setting the file pointer to the current opened file pointer
when the attribute was accessed. Similar patch up was done before when reading
dataset with variable length string datatype.
(VC - 2020/07/13, HDFFV-11080)
- Reduce overhead for H5open(), which is involved in public symbols like
H5T_NATIVE_INT, etc.
(QAK - 2020/06/18)
- Cache last ID looked up for an ID type (dataset, datatype, file, etc),
improving performance when accessing the same ID repeatedly.
(QAK - 2020/06/11)
- Streamline I/O to a single element, improving performance for record
appends to chunked datasets.
(QAK - 2020/06/11)
- Remove redundant tagging of metadata cache entries for some chunked
dataset operations, slightly improving performance for chunked
datasets.
(QAK - 2020/06/10)
- Better detect selections with the same shape, improving performance for
some uses of H5DOappend (and other situations).
(QAK - 2020/06/07)
- Don't allocate an empty (0-dimensioned) chunked dataset's chunk
index, until the dataset's dimensions are increased.
(QAK - 2020/05/07)
Java Library:
----------------
- The H5FArray.java class, in which virtually the entire execution time
is spent using the HDFNativeData method that converts from an array
of bytes to an array of the destination Java type.
1. Convert the entire byte array into a 1-d array of the desired type,
rather than performing 1 conversion per row;
2. Use the Java Arrays method copyOfRange to grab the section of the
array from (1) that is desired to be inserted into the destination array.
(PGT,ADB - 2020/12/29, HDFFV-10865)
Configuration
-------------
- Fixes Autotools determination of the stat struct having an st_blocks field
A missing parenthesis in an autoconf macro prevented building the test
code used to determine if the stat struct contains the st_blocks field.
Now that the test functions correctly, the H5_HAVE_STAT_ST_BLOCKS #define
found in H5pubconf.h will be defined correctly on both the Autotools and
CMake. This #define is only used in the tests and does not affect the
HDF5 C library.
(DER - 2021/07/01, HDFFV-11201)
Tools:
------
Fortran API
-----------
- Fixed configure issue when building HDF5 with NAG Fortran 7.0.
HDF5 now accounts for the addition of half-precision floating-point
in NAG 7.0 with a KIND=16.
(MSB - 2020/02/28, HDFFV-11033)
High-Level Library
------------------
- Eliminated unnecessary code in H5DOappend(), improving its performance.
(QAK - 2020/06/05)
Testing
-------
- Stopped java/test/junit.sh.in installing libs for testing under ${prefix}
Lib files needed are now copied to a subdirectory in the java/test
directory, and on Macs the loader path for libhdf5.xxxs.so is changed
in the temporary copy of libhdf5_java.dylib.
(LRK, 2020/07/02, HDFFV-11063)
Supported Platforms
===================
Linux 2.6.32-696.16.1.el6.ppc64 gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-18)
#1 SMP ppc64 GNU/Linux g++ (GCC) 4.4.7 20120313 (Red Hat 4.4.7-18)
(ostrich) GNU Fortran (GCC) 4.4.7 20120313 (Red Hat 4.4.7-18)
IBM XL C/C++ V13.1
IBM XL Fortran V15.1
Linux 3.10.0-327.10.1.el7 GNU C (gcc), Fortran (gfortran), C++ (g++)
#1 SMP x86_64 GNU/Linux compilers:
(kituo/moohan) Version 4.8.5 20150623 (Red Hat 4.8.5-4)
Version 4.9.3, 5.2.0, 7.1.0
Intel(R) C (icc), C++ (icpc), Fortran (icc)
compilers:
Version 17.0.0.098 Build 20160721
MPICH 3.1.4
Linux-3.10.0- spectrum-mpi/rolling-release with cmake>3.10 and
862.14.4.1chaos.ch6.ppc64le clang/3.9,8.0
#1 SMP ppc64le GNU/Linux gcc/7.3
(ray) xl/2016,2019
Linux 3.10.0- openmpi/3.1,4.0 with cmake>3.10 and
957.12.2.1chaos.ch6.x86_64 clang 5.0
#1 SMP x86_64 GNU/Linux gcc/7.3,8.2
(serrano) intel/17.0,18.0/19.0
Linux 3.10.0- openmpi/3.1/4.0 with cmake>3.10 and
1062.1.1.1chaos.ch6.x86_64 clang/3.9,5.0,8.0
#1 SMP x86_64 GNU/Linux gcc/7.3,8.1,8.2
(chama,quartz) intel/16.0,18.0,19.0
Linux 4.4.180-94.100-default cray-mpich/7.7.6 with PrgEnv-*/6.0.5, cmake>3.10 and
#1 SMP x86_64 GNU/Linux gcc/7.2.0,8.2.0
(mutrino) intel/17.0,18.0
Linux 4.14.0- spectrum-mpi/rolling-release with cmake>3.10 and
49.18.1.bl6.ppc64le clang/6.0,8.0
#1 SMP ppc64le GNU/Linux gcc/7.3
(lassen) xl/2019
SunOS 5.11 32- and 64-bit Sun C 5.12 SunOS_sparc
(emu) Sun Fortran 95 8.6 SunOS_sparc
Sun C++ 5.12 SunOS_sparc
Windows 10 x64 Visual Studio 2015 w/ Intel Fortran 18 (cmake)
Visual Studio 2017 w/ Intel Fortran 19 (cmake)
Visual Studio 2019 w/ Intel Fortran 19 (cmake)
Visual Studio 2019 w/ MSMPI 10.1 (cmake)
Mac OS X Yosemite 10.10.5 Apple clang/clang++ version 6.1 from Xcode 7.0
64-bit gfortran GNU Fortran (GCC) 4.9.2
(osx1010dev/osx1010test) Intel icc/icpc/ifort version 15.0.3
Mac OS X El Capitan 10.11.6 Apple clang/clang++ version 7.3.0 from Xcode 7.3
64-bit gfortran GNU Fortran (GCC) 5.2.0
(osx1011dev/osx1011test) Intel icc/icpc/ifort version 16.0.2
Mac OS High Sierra 10.13.6 Apple LLVM version 10.0.0 (clang/clang++-1000.10.44.4)
64-bit gfortran GNU Fortran (GCC) 6.3.0
(bear) Intel icc/icpc/ifort version 19.0.4
Mac OS Mojave 10.14.6 Apple LLVM version 10.0.1 (clang/clang++-1001.0.46.4)
64-bit gfortran GNU Fortran (GCC) 6.3.0
(bobcat) Intel icc/icpc/ifort version 19.0.4
Tested Configuration Features Summary
=====================================
In the tables below
y = tested
n = not tested in this release
C = Cluster
W = Workstation
x = not working in this release
dna = does not apply
( ) = footnote appears below second table
<blank> = testing incomplete on this feature or platform
Platform C F90/ F90 C++ zlib SZIP
parallel F2003 parallel
Solaris2.11 32-bit n y/y n y y y
Solaris2.11 64-bit n y/n n y y y
Windows 10 y y/y n y y y
Windows 10 x64 y y/y n y y y
Mac OS X Mountain Lion 10.8.5 64-bit n y/y n y y y
Mac OS X Mavericks 10.9.5 64-bit n y/y n y y ?
Mac OS X Yosemite 10.10.5 64-bit n y/y n y y ?
Mac OS X El Capitan 10.11.6 64-bit n y/y n y y ?
CentOS 6.7 Linux 2.6.18 x86_64 GNU n y/y n y y y
CentOS 6.7 Linux 2.6.18 x86_64 Intel n y/y n y y y
CentOS 6.7 Linux 2.6.32 x86_64 PGI n y/y n y y y
CentOS 7.2 Linux 2.6.32 x86_64 GNU y y/y y y y y
CentOS 7.2 Linux 2.6.32 x86_64 Intel n y/y n y y y
Linux 2.6.32-573.18.1.el6.ppc64 n y/n n y y y
Platform Shared Shared Shared Thread-
C libs F90 libs C++ libs safe
Solaris2.11 32-bit y y y y
Solaris2.11 64-bit y y y y
Windows 10 y y y y
Windows 10 x64 y y y y
Mac OS X Mountain Lion 10.8.5 64-bit y n y y
Mac OS X Mavericks 10.9.5 64-bit y n y y
Mac OS X Yosemite 10.10.5 64-bit y n y y
Mac OS X El Capitan 10.11.6 64-bit y n y y
CentOS 6.7 Linux 2.6.18 x86_64 GNU y y y y
CentOS 6.7 Linux 2.6.18 x86_64 Intel y y y n
CentOS 6.7 Linux 2.6.32 x86_64 PGI y y y n
CentOS 7.2 Linux 2.6.32 x86_64 GNU y y y n
CentOS 7.2 Linux 2.6.32 x86_64 Intel y y y n
Linux 2.6.32-573.18.1.el6.ppc64 y y y n
Compiler versions for each platform are listed in the preceding
"Supported Platforms" table.
More Tested Platforms
=====================
The following platforms are not supported but have been tested for this release.
Linux 2.6.32-573.22.1.el6 GNU C (gcc), Fortran (gfortran), C++ (g++)
#1 SMP x86_64 GNU/Linux compilers:
(mayll/platypus) Version 4.4.7 20120313
Version 4.9.3, 5.3.0, 6.2.0
PGI C, Fortran, C++ for 64-bit target on
x86-64;
Version 17.10-0
Intel(R) C (icc), C++ (icpc), Fortran (icc)
compilers:
Version 17.0.4.196 Build 20170411
MPICH 3.1.4 compiled with GCC 4.9.3
Linux 3.10.0-327.18.2.el7 GNU C (gcc) and C++ (g++) compilers
#1 SMP x86_64 GNU/Linux Version 4.8.5 20150623 (Red Hat 4.8.5-4)
(jelly) with NAG Fortran Compiler Release 6.1(Tozai)
GCC Version 7.1.0
OpenMPI 3.0.0-GCC-7.2.0-2.29
Intel(R) C (icc) and C++ (icpc) compilers
Version 17.0.0.098 Build 20160721
with NAG Fortran Compiler Release 6.1(Tozai)
PGI C (pgcc), C++ (pgc++), Fortran (pgf90)
compilers:
Version 18.4, 19.4
MPICH 3.3
OpenMPI 2.1.5, 3.1.3, 4.0.0
Fedora32 5.8.18-200.fc32.x86_64
#1 SMP x86_64 GNU/Linux GNU gcc (GCC) 10.2.1 20201016 (Red Hat 10.2.1-6)
GNU Fortran (GCC) 10.2.1 20201016 (Red Hat 10.2.1-6)
clang version 10.0.1 (Fedora 10.0.1-3.fc32)
(cmake and autotools)
Ubuntu20.10 -5.8.0-29-generic-x86_64
#31-Ubuntu SMP x86_64 GNU/Linux GNU gcc (GCC) 10.2.0-13ubuntu1
GNU Fortran (GCC) 10.2.0-13ubuntu1
(cmake and autotools)
Known Problems
==============
CMake files do not behave correctly with paths containing spaces.
Do not use spaces in paths because the required escaping for handling spaces
results in very complex and fragile build files.
ADB - 2019/05/07
At present, metadata cache images may not be generated by parallel
applications. Parallel applications can read files with metadata cache
images, but since this is a collective operation, a deadlock is possible
if one or more processes do not participate.
CPP ptable test fails on both VS2017 and VS2019 with Intel compiler, JIRA
issue: HDFFV-10628. This test will pass with VS2015 with Intel compiler.
Known problems in previous releases can be found in the HISTORY*.txt files
in the HDF5 source. Please report any new problems found to
help@hdfgroup.org.
CMake vs. Autotools installations
=================================
While both build systems produce similar results, there are differences.
Each system produces the same set of folders on linux (only CMake works
on standard Windows); bin, include, lib and share. Autotools places the
COPYING and RELEASE.txt file in the root folder, CMake places them in
the share folder.
The bin folder contains the tools and the build scripts. Additionally, CMake
creates dynamic versions of the tools with the suffix "-shared". Autotools
installs one set of tools depending on the "--enable-shared" configuration
option.
build scripts
-------------
Autotools: h5c++, h5cc, h5fc
CMake: h5c++, h5cc, h5hlc++, h5hlcc
The include folder holds the header files and the fortran mod files. CMake
places the fortran mod files into separate shared and static subfolders,
while Autotools places one set of mod files into the include folder. Because
CMake produces a tools library, the header files for tools will appear in
the include folder.
The lib folder contains the library files, and CMake adds the pkgconfig
subfolder with the hdf5*.pc files used by the bin/build scripts created by
the CMake build. CMake separates the C interface code from the fortran code by
creating C-stub libraries for each Fortran library. In addition, only CMake
installs the tools library. The names of the szip libraries are different
between the build systems.
The share folder will have the most differences because CMake builds include
a number of CMake specific files for support of CMake's find_package and support
for the HDF5 Examples CMake project.
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