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Full Discussion: Want to improve the performance of script
Top Forums Shell Programming and Scripting Want to improve the performance of script Post 302496951 by caruccio on Tuesday 15th of February 2011 08:47:09 PM
Old 02-15-2011
Little tip: less pipes!

this:
Code:
output=`cat $2 | grep "CustomCDRInterceptor" | grep "$a" | grep "$b" | cut -d"|" -f6 | awk -F"," '{print $4,",",$28,",",$27,",",$17,",",$12,","$21,",",$11,",",$26,",",$14,",",$6,",",$30,",",$31,",",$19,",",$5,",",$22,",",$10,",",$9,",",$20,",",$15,",",$29,",",substr($32,1,match($32,/\]/)-1),",",$23,",",$18,",",$24,",",$7,",",$13,",",$2,",",$25,",",$16,",",$8,",",$1,",",$3,","}'`

could be turned into this:
Code:
grep -e "CustomCDRInterceptor" -e "$a" -e "$b" | cut ....

Also, it's more expensive to issue 3500 grep's over 12GB than iterator over 12GBs issuing a grep over 3500 lines. Invert you search order.
Look from logs to records, not from records to logs.
Last edited by Franklin52; 02-16-2011 at 07:20 AM.. Reason: Please use code tags, thank you
 

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LEARN ABOUT XFREE86

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)
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