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Top Forums Shell Programming and Scripting Read text between regexps and write into files based on a field in the text Post 302865175 by Chubler_XL on Thursday 17th of October 2013 10:11:53 PM
Old 10-17-2013
Limits are most definitely implementation specific, GNU awk, for example, seems to have no limit on open files, apart from those enforced by the OS limits.

GNU awk 3.1.7 on RHEL 6.4 will allow 24768 and with GNU awk 4.1.0 on cygwin 6.1 I could get 1834.

---------- Post updated at 12:11 PM ---------- Previous update was at 11:54 AM ----------

I'm surprised this solution is running slow for you, awk is fairly efficient and even if it's re-coded in C I wouldn't expect much improvement.

Are you writing the output department files to the same disk as the huge_file.txt is stored on, contention between read and write may be slowing it down. If you have more than 1 drive in the system try writing the output elsewhere eg make current directory on /disk1/tmp and read input file from /disk2/data.
 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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