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PARSORT(1) parallel PARSORT(1)


parsort - Sort (big files) in parallel


parsort options for sort


parsort uses GNU sort to sort in parallel. It works just like sort but faster on inputs with more than 1 M lines, if you have a multicore machine.

Hopefully these ideas will make it into GNU sort in the future.


Sort files:

  parsort *.txt > sorted.txt

Sort stdin (standard input) numerically:

  cat numbers | parsort -n > sorted.txt


parsort is faster on files, because these can be read in parallel.

On a 48 core machine you should see a speedup of 3x over sort.


Copyright (C) 2020-2021 Ole Tange, and Free Software Foundation, Inc.


Copyright (C) 2012 Free Software Foundation, Inc.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or at your option any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see <>.


parsort uses sort, bash, and parallel.



2021-04-06 20210322