parsort(1)

1PARSORT(1)                         parallel                         PARSORT(1)
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NAME

6       parsort - Sort (big files) in parallel
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SYNOPSIS

9       parsort options for sort
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DESCRIPTION

12       parsort uses GNU sort to sort in parallel. It works just like sort but
13       faster on inputs with more than 1 M lines, if you have a multicore
14       machine.
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16       Hopefully these ideas will make it into GNU sort in the future.
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OPTIONS

19       Same as sort. Except:
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21       --parallel=N
22           Change the number of sorts run concurrently to N. N will be
23           increased to number of files if parsort is given more than N files.
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EXAMPLE

26       Sort files:
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28         parsort *.txt > sorted.txt
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30       Sort stdin (standard input) numerically:
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32         cat numbers | parsort -n > sorted.txt
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PERFORMANCE

35       parsort is faster on files than on stdin (standard input), because
36       different parts of a file can be read in parallel.
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38       On a 48 core machine you should see a speedup of 3x over sort.
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AUTHOR

41       Copyright (C) 2020-2023 Ole Tange, http://ole.tange.dk and Free
42       Software Foundation, Inc.
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LICENSE

45       Copyright (C) 2012 Free Software Foundation, Inc.
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47       This program is free software; you can redistribute it and/or modify it
48       under the terms of the GNU General Public License as published by the
49       Free Software Foundation; either version 3 of the License, or at your
50       option any later version.
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52       This program is distributed in the hope that it will be useful, but
53       WITHOUT ANY WARRANTY; without even the implied warranty of
54       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
55       General Public License for more details.
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57       You should have received a copy of the GNU General Public License along
58       with this program.  If not, see <http://www.gnu.org/licenses/>.
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DEPENDENCIES

61       parsort uses sort, bash, and parallel.
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