I am pleased to announce the release of plzip 1.13.
Plzip is a massively parallel (multithreaded) implementation of lzip. Plzip
uses the compression library lzlib.
Lzip is a lossless data compressor with a user interface similar to the one
of gzip or bzip2. Lzip uses a simplified form of LZMA (Lempel-Ziv-Markov
chain-Algorithm) and is designed to achieve complete interoperability
between implementations. The maximum dictionary size is 512 MiB so that any
lzip file can be decompressed on 32-bit machines. Lzip provides accurate and
robust 3-factor integrity checking. 'lzip -0' compresses about as fast as
gzip, while 'lzip -9' compresses most files more than bzip2. Decompression
speed is intermediate between gzip and bzip2. Lzip provides better data
recovery capabilities than gzip and bzip2. Lzip has been designed, written,
and tested with great care to replace gzip and bzip2 as general-purpose
compressed format for Unix-like systems.
Plzip can compress/decompress large files on multiprocessor machines much
faster than lzip, at the cost of a slightly reduced compression ratio (0.4
to 2 percent larger compressed files). Note that the number of usable
threads is limited by file size; on files larger than a few GB plzip can use
hundreds of processors, but on files smaller than 1 MiB plzip is no faster
than lzip (not even at compression level -0).
The homepage is at http://www.nongnu.org/lzip/plzip.html
The sources can be downloaded from
http://download.savannah.nongnu.org/releases/lzip/plzip/
The sha256sums are:
7fe0141b72eaf084d82aad3b14b3a4d96dff0bdefaf7c389f755d8948b3637c8
plzip-1.13.tar.lz
64d49dde20daa5fdff2b3ff28e3348082de10dd54eb10df6da7d1bc6c7a6db64
plzip-1.13.tar.gz
This release is also GPG signed. You can download the signature by appending
'.sig' to the URL. If the 'gpg --verify' command fails because you don't
have the required public key, you may download the key from
http://savannah.gnu.org/people/viewgpg.php?user_id=12809 or the GNU keyring
from http://ftpmirror.gnu.org/gnu-keyring.gpg
Key fingerprint = 1E5A EE0B 18C0 DEB4 5D64 AA03 25B6 2C98 2150 1AA0
(This release is signed with a new key because the old 1024-bit DSA key
8FE99503132D7742 is no longer accepted by Debian).
Changes in version 1.13:
* '-dvv' and '-tvv' now print (de)compressed sizes instead of compression
ratio. (Sizes are more informative than compression ratio).
* Large numbers in option arguments are now accepted with underscore
separators (-s 123_456_789).
* Large numbers are now printed with underscore separators (123_456_789).
* '-h' now prints a short help screen containing only the command-line
options. For full help, use '--help'.
* '--list' now can safely skip any trailing data added to a lzip file by
the option '--append' of lziprecover.
* '--list' now prints '+t' after the number of members to indicate the
presence of trailing data, and prints the size of the trailing data below
the size of the last member.
* '-lvv' now prints a blank line between the list of members of each
multimember file and the next file.
* 'EXIT STATUS' now has its own section in the man page.
Please send bug reports and suggestions to [email protected]
Regards,
Antonio Diaz, plzip co-author and maintainer.
http://www.nongnu.org/lzip/lzip_benchmark.html
