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Full Discussion: awk - saving results of external script to variable.
Top Forums Shell Programming and Scripting awk - saving results of external script to variable. Post 302955996 by treesloth on Thursday 24th of September 2015 02:11:44 PM
Old 09-24-2015
awk - saving results of external script to variable.
So, I've been playing with speeding up some analysis we do by using multiple threads of awk (actually, mawk, but code-compatible as far as I use it) on multiple CPU cores. So, I have a big data file and I have several copies of exactly the same processor script, written in mawk. I also have a "distributor" in mawk whose only job is to determine the modulus of a given line's number and use that to send the line to the appropriate processor script. Then, when that's all done, the results of the processor scripts are joined together into a final result. Here's the "distributor" line:

Code:
mawk -F , -v count=6 'NR > 1 {mod = NR%count + 1 ; proc = "./proc." mod ".mawk -F ,"; print $0 | proc}' datafile.csv

So, lines 6, 12, 18, etc will go to proc.1.mawk, 7, 13, 19 will go to proc.2.mawk, and so on. Those work very well. The problem is in gathering up those results. Currently, each proc.X.mawk script just spits out its answer to stdout, and I have to pipe to another awk to sum those. My question, then: Is there a way to have the "distributor" receive the results from the proc.X.mawk scripts and sum them itself, such as by saving to a variable that can be acted on later?

Thanks in advance.
 

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LEARN ABOUT REDHAT

igawk

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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