diff options
Diffstat (limited to 'RELEASE')
| -rw-r--r-- | RELEASE | 156 |
1 files changed, 78 insertions, 78 deletions
@@ -6,13 +6,12 @@ INTRODUCTION -This document describes the differences between HDF5-1.2.0 and +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. +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 +The HDF5 documentation can be found on the NCSA ftp server (ftp.ncsa.uiuc.edu) in the directory: /HDF/HDF5/docs/ @@ -37,35 +36,34 @@ CONTENTS New features ============ * The Virtual File Layer, VFL, is added to replace the old file - drivers. It also provides an API for user defined file drivers. - * New features added to snapshots. Use 'snapshot help' to see a + drivers. It also provides an API for user defined file drivers. + * New features added to snapshots. Use 'snapshot help' to see a complete list of features. * Improved configure to detect if MPIO routines are available when parallel mode is requested. - * Added Thread-Safe support. Phase I implemented. - * Added data sieve buffering to raw data I/O path. This is enabled for - all VFL drivers except the mpio & core drivers. Setting the sieve buffer - size is controlled with new API functions: H5Pset_sieve_buf_size() and - retrieved with H5Pget_sieve_buf_size(). + * Added Thread-Safe support. Phase I implemented. + * Added data sieve buffering to raw data I/O path. This is enabled + for all VFL drivers except the mpio & core drivers. Setting the + sieve buffer size is controlled with new API functions: + H5Pset_sieve_buf_size() and retrieved with H5Pget_sieve_buf_size(). * Added new Virtual File Driver, Stream VFD, to send/receive entire HDF5 files via socket connections. - * As parts of VFL, HDF-GASS and HDF-SRB are also added to this release. - To find out details, please read INSTALL_VFL file. - * Increased maximum number of dimensions for a dataset (H5S_MAX_RANK) from - 31 to 32 to align with HDF4 & netCDF. + * As parts of VFL, HDF-GASS and HDF-SRB are also added to this + release. To find out details, please read INSTALL_VFL file. + * Increased maximum number of dimensions for a dataset (H5S_MAX_RANK) + from 31 to 32 to align with HDF4 & netCDF. * Added 'query' function to VFL drivers. Also added 'type' parameter to - VFL 'read' & 'write' calls, so they are aware of the type of data being - accessed in the file. Updated the VFL document also. - * A new h4toh5 uitlity, to convert HDF4 files to analogous - HDF5 files. + VFL 'read' & 'write' calls, so they are aware of the type of data + being accessed in the file. Updated the VFL document also. + * A new h4toh5 uitlity, to convert HDF4 files to analogous HDF5 files. * Added a new array datatype to the datatypes which can be created. Removed "array fields" from compound datatypes (use an array datatype instead). Release Notes for h4toh5 beta ============================= - The h4toh5 utility converts an HDF4 file to an HDF5 file. - See the document, "Mapping HDF4 Objects to HDF5 Objects", + The h4toh5 utility converts an HDF4 file to an HDF5 file. See the + document, "Mapping HDF4 Objects to HDF5 Objects", http://hdf.ncsa.uiuc.edu/HDF5/papers/H4-H5MappingGuidelines.pdf Known Limitations of the h4toh5 beta release @@ -77,10 +75,10 @@ Release Notes for h4toh5 beta 2. String datatype - HDF4 has no 'string' type. String valued data are usually defined - as an array of 'char' in HDF4. The h4toh5 utility will generally - map these to HDF5 'String' types rather than array of char, with - the following additional rules: + HDF4 has no 'string' type. String valued data are usually defined as + an array of 'char' in HDF4. The h4toh5 utility will generally map + these to HDF5 'String' types rather than array of char, with the + following additional rules: * For the data of HDF4 SDS, image, and palette, if the data is declared 'DFNT_CHAR8' it will be assumed to be integer and @@ -95,25 +93,23 @@ Release Notes for h4toh5 beta 3. Compression, Chunking and External storage - Chunking is supported, but compression and external storage is - not. + Chunking is supported, but compression and external storage is not. - An HDF4 object that uses chunking will be converted to an HDF5 - file with analogous chunked storage. + An HDF4 object that uses chunking will be converted to an HDF5 file + with analogous chunked storage. An HDF4 object that uses compression will be converted to an uncompressed HDF5 object. - An HDF4 object that uses external storage will be converted to an - an HDF5 object without external storage. + An HDF4 object that uses external storage will be converted to an an + HDF5 object without external storage. 4. Memory use - The beta version of the h4toh5 utility copies data from HDF4 - objects in a single read followed by a single write to the - HDF5 object. For large objects, this requires a very large - amount of memory, which may be extremely slow or fail on - some platforms. + The beta version of the h4toh5 utility copies data from HDF4 objects + in a single read followed by a single write to the HDF5 object. For + large objects, this requires a very large amount of memory, which may + be extremely slow or fail on some platforms. Note that a dataset that has only been partly written will be read completely, including uninitialized data, and all the @@ -133,61 +129,62 @@ Bug fixes since HDF5-1.2.0 Library ------- + * The function H5Pset_mpi is renamed as H5Pset_fapl_mpio. - * 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 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. + * 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. + * 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. - * QAK - 4/19/00 - Improved metadata hashing & caching algorithms to avoid - many hash flushes and also remove some redundant I/O when moving metadata - blocks in the file. + * Changed H5Screate_simple and H5Sset_extent_simple to not allow + dimensions of size 0 with out the same dimension being unlimited. + * QAK - 4/19/00 - Improved metadata hashing & caching algorithms to + avoid many hash flushes and also remove some redundant I/O when + moving metadata blocks in the file. * The "struct(opt)" type conversion function which gets invoked for certain compound datatype conversions was fixed for nested compound types. This required a small change in the datatype conversion function API. * Re-wrote lots of the hyperslab code to speed it up quite a bit. - * Added bounded garbage collection for the free lists when they run out of - memory and also added H5set_free_list_limits API call to allow users to - put an upper limit on the amount of memory used for free lists. - * Checked for non-existent or deleted objects when dereferencing one with - object or region references and disallow dereference. - * "Time" datatypes (H5T_UNIX_D*) were not being stored and retrieved from - object headers correctly, fixed now. - * Fixed H5Dread or H5Dwrite calls with H5FD_MPIO_COLLECTIVE requests that - may hang because not all processes are transfer the same amount of data. - (A.K.A. prematured collective return when zero amount data requested.) - Collective calls that may cause hanging is done via the corresponding - MPI-IO independent calls. + * Added bounded garbage collection for the free lists when they run + out of memory and also added H5set_free_list_limits API call to + allow users to put an upper limit on the amount of memory used for + free lists. + * Checked for non-existent or deleted objects when dereferencing one + with object or region references and disallow dereference. + * "Time" datatypes (H5T_UNIX_D*) were not being stored and retrieved + from object headers correctly, fixed now. + * Fixed H5Dread or H5Dwrite calls with H5FD_MPIO_COLLECTIVE requests + that may hang because not all processes are transfer the same amount + of data. (A.K.A. prematured collective return when zero amount data + requested.) Collective calls that may cause hanging is done via the + corresponding MPI-IO independent calls. 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. + * 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. * Added support for pthread library and thread-safe option. * The libhdf5.settings file shows the correct machine byte-sex. * Added option "--enable-stream-vfd" to configure w/o the Stream VFD. @@ -206,9 +203,9 @@ Tools * 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. - * Merged the tools with the 1.2.2 branch. Required adding new macros, VERSION12 - and VERSION13, used in conditional compilation. Updated the Windows project files - for the tools. + * Merged the tools with the 1.2.2 branch. Required adding new + macros, VERSION12 and VERSION13, used in conditional compilation. + Updated the Windows project files for the tools. * h5dump displays opaque and bitfield data correctly. * h5dump and h5ls can browse files created with the Stream VFD (eg. "h5ls <hostname>:<port>"). @@ -227,7 +224,8 @@ Documentation Platforms Tested: ================ - Note: Due to the nature of bug fixes, only static versions of the library and tools were 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 @@ -235,6 +233,7 @@ Platforms Tested: mpt.1.3 FreeBSD 3.3-STABLE gcc 2.95.2 HP-UX B.10.20 HP C HP92453-01 A.10.32 + 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.1.3 (SGI MPI 3.2.0.0) @@ -242,6 +241,7 @@ Platforms Tested: 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 + Linux 2.2.16 RedHat gcc-2.95.2 OSF1 V4.0 DEC-V5.2-040 SunOS 5.6 cc WorkShop Compilers 4.2 no optimization |