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HDF5 version 1.11.0 currently under development
================================================================================
INTRODUCTION
This document describes the differences between HDF5-1.10.1 and HDF5 1.10.2, and
contains information on the platforms tested and known problems in HDF5-1.10.1.
For more details check the HISTORY*.txt files in the HDF5 source.
Links to HDF5 1.10.1 source code, documentation, and additional materials can be found on The HDF5 web page at:
https://support.hdfgroup.org/HDF5/
The HDF5 1.10.1 release can be obtained from:
https://support.hdfgroup.org/HDF5/release/obtain5.html
User documentation for the snapshot can be accessed directly at this location:
https://support.hdfgroup.org/HDF5/doc/
New features in the HDF5-1.10.x release series, including brief general
descriptions of some new and modified APIs, are described in the "New Features
in HDF5 1.10" document:
https://support.hdfgroup.org/HDF5/docNewFeatures/index.html
All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.10.1 (current
release) versus Release 1.10.0
https://support.hdfgroup.org/HDF5/doc/ADGuide/Changes.html
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 HDF5-1.10.1
- Supported Platforms
- Tested Configuration Features Summary
- More Tested Platforms
- Known Problems
New Features
============
Configuration:
-------------
-
Library:
--------
-
Parallel Library:
-----------------
- Optimize parallel open/location of the HDF5 super-block
Previous releases of PHDF5 required all parallel ranks to
search for the HDF5 superblock signature when opening the
file. As this is accomplished more or less as a synchronous
operation, a large number of processes can experience a
slowdown in the file open due to filesystem contention.
As a first step in improving the startup/file-open performance,
we allow MPI rank 0 of the associated MPI communicator to locate
the base offset of the super-block and then broadcast that result
to the remaining ranks in the parallel group. Note that this
approach is utilized ONLY during file opens which employ the MPIO
file driver in HDF5 by previously having called H5Pset_fapl_mpio().
HDF5 parallel file operations which do not employ multiple ranks
e.g. specifiying MPI_COMM_SELF (whose MPI_Comm_size == 1)
as opposed to MPI_COMM_WORLD, will not be affected by this
optimization. Conversely, parallel file operations on subgroups
of MPI_COMM_WORLD are allowed to be run in parallel with each
subgroup operating as an independant collection of processes.
(RAW - 2017/10/10, HDFFV-10294)
- Large MPI-IO transfers
Previous releases of PHDF5 would fail when attempting to
read or write greater than 2GB of data in a single IO operation.
This issue stems principally from an MPI API whose definitions
utilize 32 bit integers to describe the number of data elements
and datatype that MPI should use to effect a data transfer.
Historically, HDF5 has invoked MPI-IO with the number of
elements in a contiguous buffer represented as the length
of that buffer in bytes.
Resolving the issue and thus enabling larger MPI-IO transfers
is accomplished first, by detecting when a user IO request would
exceed the 2GB limit as described above. Once a transfer request
is identified as requiring special handling, PHDF5 now creates a
derived datatype consisting of a vector of fixed sized blocks
which is in turn wrapped within a single MPI_Type_struct to
contain the vector and any remaining data. The newly created
datatype is then used in place of MPI_BYTE and can be used to
fulfill the original user request without encountering API
errors.
(RAW - 2017/07/11, HDFFV-8839)
Fortran Library:
----------------
-
C++ Library:
------------
-
Tools:
------
- h5diff
h5diff has new option enable-error-stack.
Updated h5diff with the --enable-error-stack argument, which
enables the display of the hdf5 error stack. This completes the
improvement to the main tools; h5copy, h5diff, h5dump, h5ls and
h5repack.
(ADB - 2017/08/30, HDFFV-9774)
High-Level APIs:
---------------
-
C Packet Table API
------------------
-
Internal header file
--------------------
-
Documentation
-------------
-
Support for new platforms, languages and compilers.
=======================================
-
Bug Fixes since HDF5-1.10.1 release
==================================
Library
-------
- H5Zfilter_avail in H5Z.c
The public function checked for plugins, while the private
function did not.
Modified H5Zfilter_avail and private function, H5Z_filter_avail.
Moved check for plugin from public to private function. Updated
H5P__set_filter due to change in H5Z_filter_avail. Updated tests.
(ADB - 2017/10/10, HDFFV-10297, HDFFV-10319)
Configuration
-------------
- cmake
Too many commands for POST_BUILD step caused command line to be
too big on windows.
Changed foreach of copy command to use a custom command with the
use of the HDFTEST_COPY_FILE macro.
(ADB - 2017/07/12, HDFFV-10254)
Performance
-------------
-
Fortran
--------
-
Tools
-----
- h5repack
h5repack failed to copy a dataset with existing filter.
Reworked code for h5repack and h5diff code in tools library. Added
improved error handling, cleanup of resources and checks of calls.
Modified H5Zfilter_avail and private function, H5Z_filter_avail.
Moved check for plugin from public to private function. Updated
H5P__set_filter due to change in H5Z_filter_avail. Updated tests.
Note, h5repack output display has changed to clarify the individual
steps of the repack process. The output indicates if an operation
applies to all objects. Lines with notation and no information
have been removed.
(ADB - 2017/10/10, HDFFV-10297, HDFFV-10319)
- h5repack
h5repack always set the User Defined filter flag to H5Z_FLAG_MANDATORY.
Added another parameter to the 'UD=' option to set the flag by default
to '0' or H5Z_FLAG_MANDATORY, the other choice is '1' or H5Z_FLAG_OPTIONAL.
(ADB - 2017/08/31, HDFFV-10276)
- h5ls
h5ls generated error on stack when it encountered a H5S_NULL
dataspace.
Adding checks for H5S_NULL before calling H5Sis_simple (located
in the h5tools_dump_mem function) fixed the issue.
(ADB - 2017/08/17, HDFFV-10188)
- h5dump
h5dump segfaulted on output of XML file.
Function that escape'd strings used the full buffer length
instead of just the length of the replacement string in a
strncpy call. Using the correct length fixed the issue.
(ADB - 2017/08/01, HDFFV-10256)
- h5diff
h5diff segfaulted on compare of a NULL variable length string.
Improved h5diff compare of strings by adding a check for
NULL strings and setting the lengths to zero.
(ADB - 2017/07/25, HDFFV-10246)
- h5import
h5import crashed trying to import data from a subset of a dataset.
Improved h5import by adding the SUBSET keyword. h5import understands
to use the Count times the Block as the size of the dimensions.
Added INPUT_B_ORDER keyword to old-style configuration files.
The import from h5dump function expects the binary files to use native
types (FILE '-b' option) in the binary file.
(ADB - 2017/06/15, HDFFV-10219)
- h5repack
h5repack did not maintain the creation order flag of the root
group.
Improved h5repack by reading the creation order and applying the
flag to the new root group. Also added arguments to set the
order and index direction, which applies to the traversing of the
original file, on the command line.
(ADB - 2017/05/26, HDFFV-8611)
- h5diff
h5diff failed to account for strpad type and null terminators
of char strings. Also, h5diff failed to account for string length
differences and would give a different result depending on file
order in the command line.
Improved h5diff compare of strings and arrays by adding a check for
string lengths and if the strpad was null filled.
(ADB - 2017/05/18, HDFFV-9055, HDFFV-10128)
High-Level APIs:
------
-
Fortran High-Level APIs:
------
-
Documentation
-------------
-
F90 APIs
--------
-
C++ APIs
--------
-
Testing
-------
-
Supported Platforms
===================
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 4.8.4
PGI C, Fortran, C++ for 64-bit target on
x86-64;
Version 16.10-0
Intel(R) C (icc), C++ (icpc), Fortran (icc)
compilers:
Version 15.0.3.187 (Build 20150407)
MPICH 3.1.4 compiled with GCC 4.9.3
Linux 2.6.32-573.18.1.el6.ppc64 gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-4)
#1 SMP ppc64 GNU/Linux g++ (GCC) 4.4.7 20120313 (Red Hat 4.4.7-4)
(ostrich) GNU Fortran (GCC) 4.4.7 20120313 (Red Hat 4.4.7-4)
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, Version 5.2.0
Intel(R) C (icc), C++ (icpc), Fortran (icc)
compilers:
Version 15.0.3.187 Build 20150407
MPICH 3.1.4 compiled with GCC 4.9.3
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 7 Visual Studio 2012 w/ Intel Fortran 15 (cmake)
Visual Studio 2013 w/ Intel Fortran 15 (cmake)
Visual Studio 2015 w/ Intel Fortran 16 (cmake)
Windows 7 x64 Visual Studio 2012 w/ Intel Fortran 15 (cmake)
Visual Studio 2013 w/ Intel Fortran 15 (cmake)
Visual Studio 2015 w/ Intel Fortran 16 (cmake)
Visual Studio 2015 w/ Intel C, Fortran 2017 (cmake)
Visual Studio 2015 w/ MSMPI 8 (cmake)
Cygwin(CYGWIN_NT-6.1 2.8.0(0.309/5/3)
gcc and gfortran compilers (GCC 5.4.0)
(cmake and autotools)
Windows 10 Visual Studio 2015 w/ Intel Fortran 16 (cmake)
Cygwin(CYGWIN_NT-6.1 2.8.0(0.309/5/3)
gcc and gfortran compilers (GCC 5.4.0)
(cmake and autotools)
Windows 10 x64 Visual Studio 2015 w/ Intel Fortran 16 (cmake)
Mac OS X Mt. Lion 10.8.5 Apple clang/clang++ version 5.1 from Xcode 5.1
64-bit gfortran GNU Fortran (GCC) 4.8.2
(swallow/kite) Intel icc/icpc/ifort version 15.0.3
Mac OS X Mavericks 10.9.5 Apple clang/clang++ version 6.0 from Xcode 6.2
64-bit gfortran GNU Fortran (GCC) 4.9.2
(wren/quail) Intel icc/icpc/ifort version 15.0.3
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
(osx1010dev/osx1010test) Intel icc/icpc/ifort version 16.0.2
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 7 y y/y n y y y
Windows 7 x64 y y/y y y y y
Windows 7 Cygwin n y/n n y y y
Windows 7 x64 Cygwin 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 7 y y y y
Windows 7 x64 y y y y
Windows 7 Cygwin n n n y
Windows 7 x64 Cygwin n n n 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 4.8.4
PGI C, Fortran, C++ for 64-bit target on
x86-64;
Version 16.10-0
Intel(R) C (icc), C++ (icpc), Fortran (icc)
compilers:
Version 15.0.3.187 (Build 20150407)
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)
Intel(R) C (icc) and C++ (icpc) compilers
Version 15.0.3.187 (Build 20150407)
with NAG Fortran Compiler Release 6.1(Tozai)
Linux 2.6.32-573.18.1.el6.ppc64 MPICH mpich 3.1.4 compiled with
#1 SMP ppc64 GNU/Linux IBM XL C/C++ for Linux, V13.1
(ostrich) and IBM XL Fortran for Linux, V15.1
Debian 8.4 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1 x86_64 GNU/Linux
gcc, g++ (Debian 4.9.2-10) 4.9.2
GNU Fortran (Debian 4.9.2-10) 4.9.2
(cmake and autotools)
Fedora 24 4.7.2-201.fc24.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
gcc, g++ (GCC) 6.1.1 20160621
(Red Hat 6.1.1-3)
GNU Fortran (GCC) 6.1.1 20160621
(Red Hat 6.1.1-3)
(cmake and autotools)
Ubuntu 16.04.1 4.4.0-38-generic #57-Ubuntu SMP x86_64 GNU/Linux
gcc, g++ (Ubuntu 5.4.0-6ubuntu1~16.04.2)
5.4.0 20160609
GNU Fortran (Ubuntu 5.4.0-6ubuntu1~16.04.2)
5.4.0 20160609
(cmake and autotools)
Known Problems
==============
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.
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.
|
