Optimizing the Shell Script [Expert Advise Needed] Post: 303007854

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Top Forums Shell Programming and Scripting Optimizing the Shell Script [Expert Advise Needed] Post 303007854 by MadeInGermany on Wednesday 22nd of November 2017 03:11:45 PM

11-22-2017

Registered User

If the long runtime is caused by the many files that find needs to traverse then there is hardly anything that can be done.
But maybe it is due to a misbehavior of a special character.
The following is a bit safer, and contains some further optimizations, like using a filedescriptor for logging rather than open-append-close each time, and sorting on key field 1 only, ...

Code:

#!/bin/bash
PATH=/bin:/usr/bin:/usr/sbin:/sbin
NOW=$(date +"%F-%H:%M:%S")
LOGFILE="purge_duplicate_log-$NOW.log"
LOGTIME=`date "+%Y-%m-%d %H:%M:%S"`
cd /tmp/sathish/GB/ || exit
mkdir -p dup || exit
echo "$LOGFILE"
exec 3>>"$LOGFILE" # open it once, the shell will close it at exit
echo "Started at $LOGTIME " >&3
echo "Before File Count " >&3
ls | wc -l >&3
dups=$(find . -type f \( -iname "*.xml" \) -printf '%T@ %p\n' | sort -rg -k 1,1 | sed 's/[^ ]* //' | awk -F"_" 'dup[$1]++')
if [ -z "$dups" ]
then
  echo "No Duplicates Identified" >&3
else
  set -f # no wildcard globbing, only word splitting
  for i in $dups
  do
    mv -vf "$i" dup/
  done >&3 2>&1
  set +f
fi
echo "Ended at $LOGTIME " >&3
echo "After File Count " >&3
ls | wc -l >&3

MadeInGermany

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cpanplus::shell

CPANPLUS::Shell(3perl)					 Perl Programmers Reference Guide				    CPANPLUS::Shell(3perl)

NAME

       CPANPLUS::Shell - base class for CPANPLUS shells

SYNOPSIS

	   use CPANPLUS::Shell; 	    # load the shell indicated by your
					    # config -- defaults to
					    # CPANPLUS::Shell::Default

	   use CPANPLUS::Shell qw[Classic]  # load CPANPLUS::Shell::Classic;

	   my $ui      = CPANPLUS::Shell->new();
	   my $name    = $ui->which;	    # Find out what shell you loaded

	   $ui->shell;			    # run the ui shell

DESCRIPTION

       This module is the generic loading (and base class) for all "CPANPLUS" shells. Through this module you can load any installed "CPANPLUS"
       shell.

       Just about all the functionality is provided by the shell that you have loaded, and not by this class (which merely functions as a generic
       loading class), so please consult the documentation of your shell of choice.

BUG REPORTS

       Please report bugs or other issues to <bug-cpanplus@rt.cpan.org<gt>.

AUTHOR

       This module by Jos Boumans <kane@cpan.org>.

COPYRIGHT

       The CPAN++ interface (of which this module is a part of) is copyright (c) 2001 - 2007, Jos Boumans <kane@cpan.org>. All rights reserved.

       This library is free software; you may redistribute and/or modify it under the same terms as Perl itself.

SEE ALSO

       CPANPLUS::Shell::Default, CPANPLUS::Shell::Classic, cpanp

perl v5.14.2							    2014-09-29						    CPANPLUS::Shell(3perl)