Code speedup
Description:
Chunking I/O routines are reading in an entire chunk when performing I/O
on the chunk, even if the chunk will be too large to cache.
Solution:
If the chunk is too large to cache, uncompressed and has been allocated
space in the file, or if we are using the MPI-I/O VFD, perform the I/O
directly to the chunk, instead of reading the chunk into memory, updating
it and immediately writing the entire chunk back out.
Platforms tested:
FreeBSD 4.5 (sleipnir) (using serial access) and IRIX64 6.5 (modi4) (using
parallel access with MPI-I/O)
Bug Fix
Description:
When file space was returned to the file space free-list for reuse,
occasionally raw data allocations which used space from the free-list
would overlap with the metadata accumulator and get over-written with
the cached information in the accumulator, corrupting the data.
Solution:
Check if the space about to be recycled on the free-list is going to be
used for raw data and also overlaps with the metadata accumulator cache,
avoiding using space that fits those criteria.
This fixes bug #701
Platforms tested:
FreeBSD 4.5 (sleipnir)
Purpose:
Maintenance
Description:
Updated compilers information for OSF5.1 and added C++ support
for SP3 and OSF5.1 to the "Configuration Features" table.
Document bug
Description:
Mention that h5dump and h5ls are not displaying variable-length string
datatype information correctly. I've also entered a more detailed bug into
the bug database.
Purpose:
feature add
Description:
Added ability to h5dumper to dump Group comments.
Solution:
Stole the code from h5ls that does this and put it into the h5dumper
code. Modified the DDL to reflect the newest change. Added a testcase
(tgrp_comments.*) to test that it's actually doing the comments
correctly.
Small modification to H5G.c. The error comment should have said that
it couldn't "get" the comment instead of "set" the comment...
Platforms tested:
Dangermouse, Kelgai, Modi4
Code cleanup
Description:
Tweaked internal error handling macros to reduce the size of the library's
object code by about 10-20%.
Platforms tested:
FreeBSD 4.4 (sleipnir)
Bug Fix
Description:
The file metadata macros generate unaligned access warnings on the IA64
architecture.
Solution:
Got rid of bogus big-endian vs. little-endian differentiation when encoding
and decoding file metadata and use proper set of macros to prevent unaligned
access problems.
This fixes bug #672.
Platforms tested:
FreeBSD 4.4 (sleipnir)
Bug Fix
Description:
The code in H5Sselect_hyperslab_valid contained an fencepost error and is
allowing selections which overlap the extent by exactly one element in any
dimension to pass as valid instead of flagging the selection as invalid.
This bug only affects hyperslabs which have been OR'ed together, not the
selection from a single H5Sselect_hyperslab.
This fixes bug #550.
Solution:
Changed an '>' to an '>=' and added new regression test to check for error.
Platforms tested:
FreeBSD 4.4 (sleipnir)
Document bug fix.
Description:
The internal B-tree code was dumping core with an assertion failure when
flushing data to the file if too many objects were put into the same B-tree
(forcing the root node to split, I think).
Solution:
Fixed the B-tree copy routine to copy the correct number of raw keys.
Platforms tested:
FreeBSD 4.4 (hawkwind), Solaris 2.6 (baldric)
Purpose:
a bug fix
Description:
Forget adding one line for "This creates a
directory called 'hdf5xxx'under MyHDFstuff which contains
several files and directories. "
Solution:
should be "This creates a
directory called 'hdf5xxx'under MyHDFstuff which contains
several files and directories. Rename directory "hdf5xxx" into
"hdf5".
Platforms tested:
eirene
Purpose:
Maintenance for the hdf5-1.4.2-post0
Description:
Added information about hdf5-1.4.2 release to the HISTORY.txt
Modified RELEASE.txt for hdf5-1.4.2-post0 (or whatever it shoud be after 1.4.2)
Purpose:
Bug Fix
Description:
Mentioned that Parallel HDF5 is available on Linux platforms. Also
removed the statement that Parallel HDf5 is available on HPUX V Class
machines (it failed the tests. Only serial mode is available).
Platforms tested:
Optical Scan
