huge-merge.pl - Merge the results of multiple huge-sort generated files into a
single sorted file.
Combine the sorted bigram files generated by huge-sort.pl efficiently.
This program is used internally by huge-count.pl.
huge-merge.pl [OPTIONS] SOURCEDIR
Input to huge-merge.pl should be a single flat directory containing multiple
plain text files generated by huge-sort.pl. The result file, merge.* (* is a
number, the final result file has the maximum number), is in the source
Switches ON the --keep option will keep all the intermediate merging files.
Displays the help information.
Displays the version information.
There is a limitation in huge-merge.pl. When the size of the corpus is very
large (>16G) and the some of the terms of the bigrams is very long (>30
chars), the program could run out of memory at huge-merge.pl step. This is
because huge-merge use two hashes to count the frequencies of the first and
second term of the bigrams. These two hashes could use up the memory with the
increase of the length of the terms and the increase of the number of the
terms. If just for normal text, terms are within limited length and numbers,
the software won't use up the memory.
Ying Liu, University of Minnesota, Twin Cities. liux0395 at umn.edu
Ted Pedersen, University of Minnesota, Duluth. tpederse at umn.edu
Copyright (C) 2009-2011, Ying Liu and Ted Pedersen
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 2 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
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA.