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HDF5 Release 1.2.2-pre0
Under Development
INTRODUCTION
This document describes the differences between HDF5-1.2.1 and
HDF5-1.2.2, and contains information on the platforms where HDF5-1.2.2
was tested(??????????) and known problems in HDF5-1.2.2. 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
- Bug fixes since HDF5-1.2.1
- Known Problems
- Platforms Tested
Features added since HDF5-1.2.1
===============================
* Added internal free-lists to reduce memory required by the library and
H5garbage_collect API function
Bug fixes since HDF5-1.2.1
==========================
* 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.
* Corrected a floating point number conversion error for the
Cray J90 platform. The error did not convert the value 0.0
correctly.
* h5dump correctly displays the committed copy of predefined types
correctly.
* New features added to snapshots. Use 'snapshot help' to see a
complete list of features.
* 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.
* 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 libhdf5.settings file shows the correct machine byte-sex.
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.
Platforms 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
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