GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  PIXZ (1)

NAME

pixz - parallel, indexed xz compressor

CONTENTS

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\(cqs 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\(cqt 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\(cqs 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: http://sourceforge.net/projects/pixz/files/

COPYRIGHT

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

SEE ALSO

xz(1), tar(1)

Search for    or go to Top of page |  Section 1 |  Main Index


& PIXZ (1) 06/06/2013

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.