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

 
 
Membership Info
Project Admin:
5 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

Go through the tutorial http://www.gnu.org/software/parallel/parallel_tutorial.html or
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 20140722 ('MH17') released
     posted by tange, Tue 22 Jul 2014 04:53:00 AM UTC - 0 replies

GNU Parallel 20140722 ('MH17') has been released. It is available for download at: http://ftp.gnu.org/gnu/parallel/

This release contains a major change in central parts of the code and should be considered beta quality. As always it passes the testsuite, so most functionality clearly works. ...


[Read more]
GNU Parallel 20140622 ('Brazil') released
     posted by tange, Mon 23 Jun 2014 01:41:48 AM UTC - 0 replies

GNU Parallel 20140622 ('Brazil') has been released. It is available for download at: http://ftp.gnu.org/gnu/parallel/

Haiku of the month:

goodbye to xargs
quoting is still a black art
welcome parallel
-- Malcolm Cook

New in this release: ...


[Read more]
GNU Parallel 20140522 ('Boko Haram') released
     posted by tange, Thu 22 May 2014 12:56:35 PM UTC - 0 replies

GNU Parallel 20140522 ('Boko Haram') has been released. It is available for download at: http://ftp.gnu.org/gnu/parallel/

New in this release:

  • Use --semaphoretimeout to ignore the semaphore lock after a while.
  • {%} introduced as job slot replacement string. It has known bugs. ...

[Read more]
GNU Parallel 20140422 ('세월호') released
     posted by tange, Tue 22 Apr 2014 04:37:44 PM UTC - 0 replies

GNU Parallel 20140422 ('세월호') has been released. It is available for download at: http://ftp.gnu.org/gnu/parallel/

New in this release:

  • --pipepart is a highly efficient alternative to --pipe if the input is a real file and not a pipe. ...

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

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

Back to the top


Powered by Savane 3.1-cleanup