Changes since 1.0:
Changes in 1.0.2 (Jul 25, 2007)
- Added support to directly compress files without using threads
when files are smaller than the specified block size or the
system only has 1 CPU. This will speed things up considerably
if you are compressing many small files. You can force this
behaviour by using -p1
- Added support for pbunzip2 symlink to automatically specify
decompression mode
- Changed pbzip2 exit code behaviour to match bzip2 for all error
states (ie: trying to compress a file that already has a .bz2
extension)
Changes in 1.0.1 (Mar 20, 2007)
- Added #ifdef PBZIP_NO_LOADAVG to remove load average code for
UNIX systems that do not support it such as HP-UX and OSF1
Changes since 0.9.6:
Changes in 1.0 (Mar 14, 2007)
- Official non-beta release!
- Fixed minor memory leak in queueDelete()
- Added support for UNIX systems to modify max number of CPUs used
based on load average
developer is officially maintaining the package.
The rationale for changing this from "tech-pkg" to "pkgsrc-users" is
that it implies that any user can try to maintain the package (by
submitting patches to the mailing list). Since the folks most likely
to care about the package are the folks that want to use it or are
already using it, this would leverage the energy of users who aren't
developers.
Honor PKGMANDIR.
Changes in 0.9.5 (Dec 31, 2005)
- Changed default output to silent like bzip2 and added -v switch
to make verbose
- Added support to autodetect number of CPUs on OSX
- Added support to compile on Borland and other Windows compilers
using pthreads-win32 open source library
- Added decompression throttling in case too much backlog in filewriter
- Fixed bug from patch in 0.9.4 that limited file block size to 900k
- Fixed bug that caused file output to fail with some large files
- Fixed pthreads race condition that could cause random segfaults
- Fixed pthreads resource issue that prevented pbzip2 from compressing
a large number of files at once
Changes in 0.9.4 (Aug 30, 2005)
- Fixed major bug that prevented pbzip2 from uncompressing files
created with a BWT block size other than default 900k (oops!)
- Fixed some bugs in the command line parser
- Code cleanup
- Updated RPM spec to match Fedora Extras policy
Changes in 0.9.3 (Aug 22, 2005)
- Added sanity check to ensure integers are the size we expect
- Ported code to compile under MinGW in Windows
- Small code cleanup
- Added ChangeLog
- Added man page
- Added AUTHORS file
- Renamed LICENCE.txt to COPYING
- Renamed README.txt to README
- Updated RPM spec file in preparation for inclusion into Fedora Extras
- Moved ChangeLog info from pbzip2.cpp into this file
- Removed extra spaces/tabs in pbzip2.cpp
rely on PROG_CXX being known to <bsd.prog.mk>. This has been a problem
on some non-NetBSD platforms. Noted by minskim. Tested on NetBSD-1.6.2 and
Solaris/SunPro.
New in 0.9.2:
* Created workaround for a major pthreads problem (on Linux at
least) that would cause segfaults and missed signals in the
pthreads library itself when mutexes or signals were
created/destroyed too quickly. This used to happen when
processing multiple files, but now pbzip2 only generates its
mutexes and signals at the beginning and reuses the same ones
for multiple files. Special thanks to George Chalissery for help
with this one.
* Increased size of BZIP2 header match from 56 bits to 72 bits for
more accurate detection
* Modified some buffers to use the vector class for easier memory
management and to eliminate one read pass of the input data for
decompression so should be slightly faster.
* Now checks if input file exists before checking if output file
already exists (when not using -f)
* Now checks to ensure input is regular file and not a directory
before processing
* Now deletes input file only if output file exists and is greater
than 0 bytes (-k will always preserve input file)
* Now checks input file for bzip2 header before trying to
decompress file
* Minor code cleanup
New in 0.9.1
* Fixed bug: -c switch now implies -k so input file is not deleted
when data is output to stdout
New in 0.9.0:
* Added -c switch for data output to stdout
* Added -t switch to test integrity of compressed data
* Added autodetection for # of CPUs on supported platforms and
made detected value default # CPUs to use
* Fixed bug where pbzip2 processed 0 byte files
* Tried to make program exit codes the same as bzip2
The pbzip2 program is a parallel version of bzip2 for use on shared
memory machines. It provides near-linear speedup when used on true
multi-processor machines and 5-10% speedup on Hyperthreaded machines.
The output is fully compatible with the regular bzip2 data so any
files created with pbzip2 can be uncompressed by bzip2 and vice-versa.
