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GNU Parallel 20101202 released

Item posted by Ole Tange <tange> on Thu 02 Dec 2010 09:22:20 PM UTC.

GNU Parallel 20101202 has been released. It is available for
download at: http://ftp.gnu.org/gnu/parallel/

New in this release:

  • Implemented {/} for the input line with the path removed (basename).
  • Implemented {/.} for the input line with extension and path removed (basename).
  • Output from --progress is now sent to standard error instead of standard output.
  • --eta was broken and counted down from 0. Now fixed.
  • Standard output and standard error are flushed after every job so if standard output does not end with a newline it will still be grouped with the rest of standard output.
  • --command, -c, --file, and -f are now removed as options. They were never used in practice.
  • GetOptionsFromArray rewritten to work with old Perl libraries.
  • The file COPYING now contains the GNU General Public License 3
  • Major rewrite to make the code more object oriented and easier to maintain in the future.

About GNU Parallel

GNU Parallel is a shell tool for executing jobs in parallel using one or more machines. 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 in parallel. If you use ppss or pexec you will find GNU Parallel will often make the command easier to read.

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.

You can find more about GNU Parallel at: http://www.gnu.org/software/parallel/

Watch the intro video on http://www.youtube.com/watch?v=OpaiGYxkSuQ or at http://tinyogg.com/watch/TORaR/ and http://tinyogg.com/watch/hfxKj/

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