HDF5 Release 1.3.x Under Development INTRODUCTION This document describes the differences between HDF5-1.2.0 and HDF5-1.3.x, and contains information on the platforms where HDF5-1.3.x was tested (????? careful, under construction) and known problems in HDF5-1.3.x. For more details check the HISTORY 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 HDF5-1.2.0 - Platforms Tested - Known Problems New features ============ VFL(?) * New features added to snapshots. Use 'snapshot help' to see a complete list of features. Bug fixes since HDF5-1.2.0 ========================== Library ------- * Corrected a floating point number conversion error for the Cray J90 platform. The error did not convert the value 0.0 correctly. * Error was fixed which was not allowing dataset region references to have their regions retrieved correctly. * Corrected a bug that caused non-parallel file drivers to fail in the parallel version. * Added internal free-lists to reduce memory required by the library and H5garbage_collect API function * Fixed error in H5Giterate which was not updating the "index" parameter correctly. * Fixed error in hyperslab iteration which was not walking through the correct sequence of array elements if hyperslabs were staggered in a certain pattern * Fixed several other problems in hyperslab iteration code. * Fixed another H5Giterate bug which was causes groups with large numbers of objects in them to misbehave when the callback function returned non-zero values. * Changed return type of H5Aiterate and H5A_operator_t typedef to be herr_t, to align them with the dataset and group iterator functions. * Changed H5Screate_simple and H5Sset_extent_simple to not allow dimensions of size 0 with out the same dimension being unlimited. Configuration ------------- * The hdf5.h include file was fixed to allow the HDF5 Library to be compiled with other libraries/applications that use GNU autoconf. * Configuration for parallel HDF5 was improved. Configure now attempts to link with libmpi.a and/or libmpio.a as the MPI libraries by default. It also uses "mpirun" to launch MPI tests by default. It tests to link MPIO routines during the configuration stage, rather than failing later as before. One can just do "./configure --enable-parallel" if the MPI library is in the system library. Tools ------ * h5dump correctly displays compound datatypes. * Corrected an error in h5toh4 which did not convert the 32bits int from HDF5 to HDF4 corectly for the T3E platform. * h5dump correctly displays the committed copy of predefined types correctly. * Added an option, -V, to show the version information of h5dump. * Fixed a core dumping bug of h5toh4 when executed on platforms like TFLOPS. * The test script for h5toh4 used to not able to detect the hdp dumper command was not valid. It now detects and reports the failure of hdp execution. Documentation ------------- * User's Guide and Reference Manual were updated. See doc/html/PSandPDF/index.html for more details. Platforms Tested: ================ Note: Due to the nature of bug fixes, only static versions of the library and tools were tested. AIX 4.3.2 (IBM SP) 3.6.6 Cray T3E 2.0.4.81 cc 6.3.0.1 mpt.1.3 FreeBSD 3.3-STABLE gcc 2.95.2 HP-UX B.10.20 HP C HP92453-01 A.10.32 IRIX 6.5 MIPSpro cc 7.30 IRIX64 6.5 (64 & n32) MIPSpro cc 7.3.1m mpt.1.3 (SGI MPI 3.2.0.0) Linux 2.2.10 SuSE egcs-2.91.66 configured with (i686-pc-linux-gnu) --disable-hsizet mpich-1.2.0 egcs-2.91.66 19990314/Linux OSF1 V4.0 DEC-V5.2-040 SunOS 5.6 cc WorkShop Compilers 4.2 no optimization SunOS 5.7 cc WorkShop Compilers 5.0 TFLOPS 2.8 cicc (pgcc Rel 3.0-5i) mpich-1.1.2 with local changes Windows NT4.0 sp5 MSVC++ 6.0 Known Problems: ============== o SunOS 5.6 with C WorkShop Compilers 4.2: Hyperslab selections will fail if library is compiled using optimization of any level.