Performance issue in Grepping large files


 
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# 8  
Old 06-12-2013
To the OP:

If you do more than just ask us to do your work for you, you'll find us more willing to lend assistance.

If Rudi's code did not work for you, what did you do to try to remedy the shortcomings? If nothing, don't expect much from us. I can only speak for myself (but I suspect others share the sentiment) when I say that I prefer to help those that help themselves.

Regards,
Alister
# 9  
Old 06-12-2013
I suggest to run the grep with -f $keywordfile inputfiles...
That starts grep less often, and opens each inputfile once.
The post-processing is a bit more awkward:
Code:
PATH=/usr/xpg4/bin:${PATH}
export PATH
find $tmpdir -type f \( -name "*.rdf" -o -name "*.fmb" -o -name "*.pll" -o -name "*.ctl" -o -name "*.sh" \
 -o -name "*.sql" -o -name "*.prog" \) -exec grep -F -i -x -f $keywordfile /dev/null {} + |
 # the /dev/null guarantees >=2 arguments so grep always returns filename:matchword
 # fold matched keywords to lowercase and remove duplicates and add matchcount
 awk -F":" '{k2=tolower(substr($0,length($1)+1))} {c[$1 k2]++} END {for (i in c) print c[i] FS i}' |
 while IFS=":" read matchCount filename keyword
 do
 
  out3=`echo "$filename"|awk -F\. '{print $NF}'`
  
  bfilename=`basename "$filename"`
  
  case $out3 in
   'rdf')   catagoery="REPORT";;
      
   'fmb')   catagoery="FORM";;
   'sql')   catagoery="SQL FILE";;
   'pll')   catagoery="Library File";;
   'ctl')   catagoery="Control File";;
   'sh')   catagoery="Shell script";;
    *)    catagoery="OTHER";;
  esac
  
  echo "bfilename,keyword,matchCount,out3,catagoery are:- $bfilename,$keyword,$matchCount,$out3,$catagoery"
  # SQL stuff follows

 done


Last edited by MadeInGermany; 06-12-2013 at 07:44 PM.. Reason: added matchCount
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