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Full Discussion: How to make awk command faster for large amount of data?
Top Forums Shell Programming and Scripting How to make awk command faster for large amount of data? Post 303024187 by Corona688 on Tuesday 2nd of October 2018 01:35:53 PM
Old 10-02-2018
i.e.

Code:
PROC=0
MAXPROC=4

mkdir /tmp/$$

let N=0

for FILE in nginx*
do
        FNAME=$(printf "%04d" "$N") # Filenames like 0001 will sort properly in *
        gunzip < "$FILE" | awk '{...}' > /tmp/$$/$FNAME &
        PROC=$((PROC+1))
        N=$((N+1))

        if [ "$PROC" -ge "$MAXPROC" ]
       then
               wait
               PROC=0
       fi
done

wait

cat /tmp/$$/* > output
rm /tmp/$$/*
rmdir /tmp/$$

And if you are hitting throughput limits, it will help to put your temp files on a different spindle than your input files.
Last edited by Corona688; 10-02-2018 at 02:41 PM..
These 2 Users Gave Thanks to Corona688 For This Post:
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LEARN ABOUT V7

dh_movefiles

DH_MOVEFILES(1) 						     Debhelper							   DH_MOVEFILES(1)

NAME

       dh_movefiles - move files out of debian/tmp into subpackages

SYNOPSIS

       dh_movefiles [debhelperoptions] [--sourcedir=dir] [-Xitem] [file...]

DESCRIPTION

       dh_movefiles is a debhelper program that is responsible for moving files out of debian/tmp or some other directory and into other package
       build directories. This may be useful if your package has a Makefile that installs everything into debian/tmp, and you need to break that
       up into subpackages.

       Note: dh_install is a much better program, and you are recommended to use it instead of dh_movefiles.

FILES

       debian/package.files
	   Lists the files to be moved into a package, separated by whitespace. The filenames listed should be relative to debian/tmp/. You can
	   also list directory names, and the whole directory will be moved.

OPTIONS

       --sourcedir=dir
	   Instead of moving files out of debian/tmp (the default), this option makes it move files out of some other directory. Since the entire
	   contents of the sourcedir is moved, specifying something like --sourcedir=/ is very unsafe, so to prevent mistakes, the sourcedir must
	   be a relative filename; it cannot begin with a `/'.

       -Xitem, --exclude=item
	   Exclude files that contain item anywhere in their filename from being installed.

       file ...
	   Lists files to move. The filenames listed should be relative to debian/tmp/. You can also list directory names, and the whole directory
	   will be moved. It is an error to list files here unless you use -p, -i, or -a to tell dh_movefiles which subpackage to put them in.

NOTES

       Note that files are always moved out of debian/tmp by default (even if you have instructed debhelper to use a compatibility level higher
       than one, which does not otherwise use debian/tmp for anything at all). The idea behind this is that the package that is being built can be
       told to install into debian/tmp, and then files can be moved by dh_movefiles from that directory. Any files or directories that remain are
       ignored, and get deleted by dh_clean later.

SEE ALSO

       debhelper(7)

       This program is a part of debhelper.

AUTHOR

       Joey Hess <joeyh@debian.org>

11.1.6ubuntu2							    2018-05-10							   DH_MOVEFILES(1)
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