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Merging upstream version 1.12~rc1.

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Signed-off-by: Daniel Baumann <daniel@debian.org>
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Daniel Baumann 2025-02-24 04:19:50 +01:00
parent 4ddb634c25
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Signed by: daniel
GPG key ID: FBB4F0E80A80222F
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doc/plzip.1
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@ -1,32 +1,33 @@
.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.49.2.
.TH PLZIP "1" "January 2024" "plzip 1.11" "User Commands"
.TH PLZIP "1" "November 2024" "plzip 1.12-rc1" "User Commands"
.SH NAME
plzip \- reduces the size of files
.SH SYNOPSIS
.B plzip
[\fI\,options\/\fR] [\fI\,files\/\fR]
.SH DESCRIPTION
Plzip is a massively parallel (multi\-threaded) implementation of lzip,
compatible with lzip 1.4 or newer. Plzip uses the compression library lzlib.
Plzip is a massively parallel (multi\-threaded) implementation of lzip. Plzip
uses the compression library lzlib.
.PP
Lzip is a lossless data compressor with a user interface similar to the one
of gzip or bzip2. Lzip uses a simplified form of the 'Lempel\-Ziv\-Markov
chain\-Algorithm' (LZMA) stream format to maximize interoperability. 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 can compress about as fast as gzip (lzip \fB\-0\fR) or compress most
files more than bzip2 (lzip \fB\-9\fR). Decompression speed is intermediate between
gzip and bzip2. Lzip is better than gzip and bzip2 from a data recovery
perspective. Lzip has been designed, written, and tested with great care to
replace gzip and bzip2 as the standard general\-purpose compressed format for
Unix\-like systems.
of gzip or bzip2. Lzip uses a simplified form of LZMA (Lempel\-Ziv\-Markov
chain\-Algorithm) 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 \fB\-0\fR' compresses about as fast as
gzip, while 'lzip \fB\-9\fR' 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.
.PP
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 of only a few MB plzip is no faster
than lzip.
hundreds of processors, but on files smaller than 1 MiB plzip is no faster
than lzip (even at compression level \fB\-0\fR).
The number of threads defaults to the number of processors.
.SH OPTIONS
.TP
\fB\-h\fR, \fB\-\-help\fR
@ -132,8 +133,8 @@ License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>
.br
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Using lzlib 1.14
Using LZ_API_VERSION = 1014
Using lzlib 1.15\-rc1
Using LZ_API_VERSION = 1015
.SH "SEE ALSO"
The full documentation for
.B plzip