mainGNU Parallel - build and execute command lines from standard input in parallel - Summary

 
 
Show feedback again
Membership Info
Project Admin:
3 active members

Group identification
Id: #9478
System Name: parallel
Name: GNU Parallel - build and execute command lines from standard input in parallel
Group Type: Official GNU software

Search in this Group

in
   

This project is part of the GNU Project.

NAME

parallel - build and execute shell command lines from standard input in parallel

DESCRIPTION

GNU parallel is a shell tool for executing jobs concurrently locally or using remote computers. A job is typically a single command or a small script that has to be run for each of the lines in the input. The typical input is a list of files, a list of hosts, a list of users, a list of URLs, or a list of tables.

If you use xargs today you will find GNU parallel very easy to use as GNU parallel is written to have the same options as xargs. If you write loops in shell, you will find GNU parallel may be able to replace most of the loops and make them run faster by running several jobs simultaneously.

GNU parallel makes sure output from the commands is the same output as you would get had you run the commands sequentially. This makes it possible to use output from GNU parallel as input for other programs.

For each line of input GNU parallel will execute command with the line as arguments. If no command is given, the line of input is executed. Several lines will be run in parallel. GNU parallel can often be used as a substitute for xargs or cat | bash.

Before looking at the options you may want to check out the examples after the list of options. That will give you an idea of what GNU parallel is capable of.

EXAMPLES

You may want to watch the intro video for a quick introduction: http://www.youtube.com/watch?v=OpaiGYxkSuQ or at http://tinyogg.com/watch/TORaR/ and http://tinyogg.com/watch/hfxKj/

See the man page or http://www.gnu.org/software/parallel/man.html#example__working_as_xargs__n1__argument_appending for more examples.

Registration Date: Mon 27 Aug 2007 02:16:53 PM UTC
License: GNU General Public License v3 or later
Development Status: 5 - Production/Stable

 

Latest News 
GNU Parallel 20120222 ('Whitney') released
     posted by tange, Wed 22 Feb 2012 10:26:48 PM UTC - 0 replies

GNU Parallel 20120222 ('Whitney') has been released. It is available for download at: http://ftp.gnu.org/gnu/parallel/

New in this release:

  • --workdir . will use the current working dir. If the current working dir is beneath your home dir, ...

[Read more]
GNU Parallel 20120122 ('Dead SOPA') released
     posted by tange, Sun 22 Jan 2012 02:10:51 PM UTC - 0 replies

GNU Parallel 20120122 ('Dead SOPA') has been released. It is available for download at: http://ftp.gnu.org/gnu/parallel/

New in this release:

  • --header : uses the first input line as column names and you can then use {colname} as a replacement string in the command. This also works with multiple :::'s. ...

[Read more]
GNU Parallel 20111222 ('Hitchens') released
     posted by tange, Wed 21 Dec 2011 11:25:33 PM UTC - 0 replies

GNU Parallel 20111222 ('Hitchens') has been released. It is available for download at: http://ftp.gnu.org/gnu/parallel/

New in this release:

  • --timeout will now kill grandchildren.

[Read more]
GNU Parallel 20111122 ('Silvio') released
     posted by tange, Tue 22 Nov 2011 09:57:02 PM UTC - 0 replies

GNU Parallel 20111122 ('Silvio') has been released. It is available for download at: http://ftp.gnu.org/gnu/parallel/

This is a bugfix release with no new features. Probably a good release for stable long-term use.

New in this release: ...


[Read more]
[Submit News]
[23 news in archive]

Communication Tools
Mailing Lists Mailing Lists (2 public mailing-lists)

Development Tools
Bug Tracking Bug Tracker (17 open items, 74 total)
  - Browse open items
  - Submit a new item
Task Manager Task Manager (0 open items, 0 total)
  - Browse open items
  - Submit a new item
Show feedback again

Back to the top


Powered by Savane 3.1-cleanup