HDF5 Release 1.5-snap0 INTRODUCTION This document describes the differences between HDF5-1.4.0 and HDF5-1.5-snap0, and contains information on the platforms tested and known problems in HDF5-1.5-snap0. For more details check the HISTORY.txt file in the HDF5 source. The HDF5 documentation can be found on the NCSA ftp server (ftp.ncsa.uiuc.edu) in the directory: /HDF/HDF5/docs/ For more information look at the HDF5 home page at: http://hdf.ncsa.uiuc.edu/HDF5/ If you have any questions or comments, please send them to: hdfhelp@ncsa.uiuc.edu CONTENTS - New Features - Bug Fixes since HDF5-1.4.0 - Platforms Tested - Known Problems Bug Fixes since HDF5-1.4.0 ========================== Library ------- * Fixed bug with contiguous hyperslabs not being detected, causing slower I/O than necessary. * Fixed bug where non-aligned hyperslab I/O on chunked datasets was causing errors during I/O Configuration ------------- * Changed the default value of $NPROCS from 2 to 3 since 3 processes have a much bigger chance catching parallel errors than just 2. Tools ----- Documentation ------------- New Features ============ Platforms Tested ================ AIX 4.3.3.0 (IBM SP powerpc) mpcc_r 3.6.6 Cray T3E sn6711 2.0.5.45 Cray Standard C Version 6.4.0.0 Cray Fortran Version 3.4.0.2 Cray SV1 sn9605 10.0.0.7 Cray Standard C Version 6.4.0.0 Cray Fortran Version 3.4.0.2 FreeBSD 4.2 gcc 2.95.2 g++ 2.95.2 HP-UX B.10.20 HP C HP92453-01 A.10.32.30 HP-UX B.11.00 HP C HP92453-01 A.11.00.13 IRIX 6.5 MIPSpro cc 7.30 IRIX64 6.5 (64 & n32) MIPSpro cc 7.3.1m mpt.1.4.0.2 mpich-1.2.1 Linux 2.2.16-3smp gcc-2.95.2 g++ 2.95.2 pgf90 3.1-3 OSF1 V4.0 DEC-V5.2-040 Digital Fortran 90 V4.1-270 SunOS 5.6 WorkShop Compilers 5.0 98/12/15 C 5.0 (Solaris 2.6) WorkShop Compilers 5.0 99/10/25 Fortran 90 2.0 Patch 107356-04 Workshop Compilers 5.0 98/12/15 C++ 5.0 SunOS 5.7 WorkShop Compilers 5.0 98/12/15 C 5.0 (Solaris 2.7) WorkShop Compilers 5.0 99/10/25 Fortran 90 2.0 Patch 107356-04 Workshop Compilers 5.0 98/12/15 C++ 5.0 TFLOPS r1.0.4 v4.0 mpich-1.2.1 with local changes Windows NT4.0, 2000 (NT5.0) MSVC++ 6.0 Windows 98 MSVC++ 6.0 Known Problems ============== * The stream-vfd test uses ip port 10007 for testing. If another application is already using that port address, the test will hang indefinitely and has to be terminated by the kill command. To try the test again, change the port address in test/stream_test.c to one not being used in the host. * The --enable-static-exec configure flag fails to compile for Solaris platforms. This is due to the fact that not all of the system libraries on Solaris are available in a static format. The --enable-static-exec configure flag also fails to correctly compile on Linux platforms using the gcc-2.95.2 compiler. The --enable-static-exec configure flag also fails to correctly compile on IBM SP2 platform for the serial mode. The parallel mode works fine with this option. It is suggested that you don't use this option on these platforms during configuration. * With the gcc 2.95.2 compiler, HDF 5 uses the `-ansi' flag during compilation. The ANSI version of the compiler complains about not being able to handle the `long long' datatype with the warning: warning: ANSI C does not support `long long' This warning is innocuous and can be safely ignored. * SunOS 5.6 with C WorkShop Compilers 4.2: Hyperslab selections will fail if library is compiled using optimization of any level. * When building hdf5 tools and applications on windows platform, a linking warning: defaultlib "LIBC" conflicts with use of other libs will appear on debug version when running VC++6.0. This warning doesn't affect building and testing hdf5 applications. We will continue investigating this. * h5toh4 converter fails two cases(tstr.h5 and tmany.h5) for release dll version on windows 2000 and NT. The reason is possibly due to windows NT DLL convention on freeing memory. It seems that memory cannot be free across library or DLL. It is still under investigated. * The Stream VFD was not tested yet under Windows. It is not supported in the TFLOPS machine. * Shared library option is broken for IBM SP and some Origin 2000 platforms. One needs to run ./configure with '--disable-shared' * The ./dsets tests failed in the TFLOPS machine if the test program, dsets.c, is compiled with the -O option. The hdf5 library still works correctly with the -O option. The test program works fine if it is compiled with -O1 or -O0. Only -O (same as -O2) causes the test program to fail. * Certain platforms give false negatives when testing h5ls: - Solaris x86 2.5.1, Cray T3E and Cray J90 give errors during testing when displaying object references in certain files. These are benign differences due to the difference in sizes of the objects created on those platforms. h5ls appears to be dumping object references correctly. - Cray J90 (and Cray T3E?) give errors during testing when displaying some floating-point values. These are benign differences due to the different precision in the values displayed and h5ls appears to be dumping floating-point numbers correctly. * Before building HDF5 F90 Library from source on Crays (T3E and J90) replace H5Aff.f90, H5Dff.f90 and H5Pff.f90 files in the fortran/src subdirectory in the top level directory with the Cray-specific files from the ftp://hdf.ncsa.uiuc.edu/pub/ougoing/hdf5/hdf5-1.4.0-beta/F90_source_for_Crays directory. * The h4toh5 utility produces images that do not correctly conform to the HDF5 Image and Palette Specification. http://hdf.ncsa.uiuc.edu/HDF5/doc/ImageSpec.html Several required HDF5 attributes are omitted, and the dataspace is reversed (i.e., the ht. and width of the image dataset is incorrectly described.) For more information, please see: http://hdf.ncsa.uiuc.edu/HDF5/H5Image/ImageDetails.htm