manpagez: man pages & more
man pixz(1)
Home | html | info | man
pixz(1)                                                                pixz(1)




NAME

       pixz - parallel, indexed xz compressor


SYNOPSIS

       pixz [OPTIONS] [INPUT [OUTPUT]]


DESCRIPTION

       pixz compresses and decompresses files using multiple processors. If
       the input looks like a tar(1) archive, it also creates an index of all
       the files in the archive. This allows the extraction of only a small
       segment of the tarball, without needing to decompress the entire
       archive.


OPTIONS

       By default, pixz uses standard input and output, unless INPUT and
       OUTPUT arguments are provided. If pixz is provided with input but no
       output, it will delete the input once it's done.

       -d
           Decompress, instead of compress.

       -t
           Force non-tarball mode. By default, pixz auto-detects tar data, and
           if found enters tarball mode. When compressing in non-tarball mode,
           no archive index will be created. When decompressing, fast
           extraction will not be available.

       -l
           List the archive contents. In tarball mode, lists the files in the
           tarball. In non-tarball mode, lists the blocks of compressed data.

       -x PATH
           Extract certain members from an archive, quickly. All members whose
           path begins with PATH will be extracted.

       -i INPUT
           Use INPUT as the input.

       -o OUTPUT
           Use OUTPUT as the output.

       -#
           Set compression level, from -0 (lowest compression, fastest) to -9
           (highest compression, slowest).

       -e
           Use "extreme" compression, which is much slower and only yields a
           marginal decrease in size.

       -p CPUS
           Set the number of CPU cores to use. By default pixz will use the
           number of cores on the system.

       -f FRACTION
           Set the size of each compression block, relative to the LZMA
           dictionary size (default is 2.0). Higher values give better
           compression ratios, but use more memory and make random access less
           efficient. Values less than 1.0 aren't very efficient.

       -q SIZE
           Set the number of blocks to allocate for the compression queue
           (default is 1.3 * cores + 2, rounded up). Higher values give better
           throughput, up to a point, but use more memory. Values less than
           the number of cores will make some cores sit idle.

       -h
           Show pixz's online help.


EXAMPLES

       pixz < myfile > myfile.xz
           Compress a file with pixz.

       pixz myfile
           Compress to myfile.pxz, removing the original.

       tar -Ipixz -cf output.tpxz directory
           Make tar use pixz for compression.

       pixz -x path/to/file < input.tpxz | tar x
           Extract one file from an archive, quickly.


AUTHOR

       pixz is written by Dave Vasilevsky.


RESOURCES

       The pixz homepage: http://github.com/vasi/pixz/

       Source downloads: https://github.com/vasi/pixz/releases/


COPYRIGHT

       Copyright (C) 2009-2010 Dave Vasilevsky. Use of this software is
       granted under the FreeBSD License.


SEE ALSO

       xz(1), tar(1)



  1.0.5                           09/21/2015                           pixz(1)

pixz 1.0.5 - Generated Thu Sep 24 18:35:27 CDT 2015
© manpagez.com 2000-2021
Individual documents may contain additional copyright information.