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Shell Programming and Scripting
How to make awk command faster for large amount of data?
Post 303024302 by disedorgue on Friday 5th of October 2018 01:56:13 PM
10-05-2018
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hii everyone ,
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aa bb cc "12" qw
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bb qw we "123249" jh
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Error
awk: Internal software error in the tostring function on TS1101?05044400?.0085498227?0?.0011041461?.0034752266?.00397045?0?0?0?0?0?0?11/02/10?09/23/10???10?no??0??no?sct_det3_10_20110516_143936.txt
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awk "/May 23, 2012 /,0" /var/tmp/datafile
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I have script like below, who is picking number from one file and and searching in another file, and printing output.
Bu is is very slow to be run on huge file.can we modify it with awk
#! /bin/ksh
while read line1
do
echo "$line1"
a=`echo $line1`
if
then
echo "$num"
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This basic code works.
I have a very long list, almost 10000 lines that I am building into the array. Each line has either 2 or 3 fields as shown in the code snippit. The array elements are static (for a few reasons that out of scope of this question) the list has to be "built in".
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I have the below command which is referring a large file and it is taking 3 hours to run. Can something be done to make this command faster.
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LEARN ABOUT CENTOS
exigrep
EXIGREP(8) System Manager's Manual EXIGREP(8) NAME
EXIGREP - Search Exim's main log SYNOPSIS
exigrep [-l] pattern [log file] ... DESCRIPTION
The exigrep utility is a Perl script that searches one or more main log files for entries that match a given pattern. When it finds a match, it extracts all the log entries for the relevant message, not just those that match the pattern. Thus, exigrep can extract complete log entries for a given message, or all mail for a given user, or for a given host, for example. The -l flag means 'literal', that is, treat all characters in the pattern as standing for themselves. Otherwise the pattern must be a Perl regular expression. The pattern match is case-insensitive. If no file names are given on the command line, the standard input is read. If the location of a zcat command is known from the definition of ZCAT_COMMAND in Local/Makefile, exigrep automatically passes any file whose name ends in COMPRESS_SUFFIX through zcat as it searches it. BUGS
This manual page needs a major re-work. If somebody knows better groff than us and has more experience in writing manual pages, any patches would be greatly appreciated. SEE ALSO
exim(8), perlre(1), /usr/share/doc/exim4-base/ AUTHOR
This manual page was stitched together from spec.txt by Andreas Metzler <ametzler at downhill.at.eu.org>, for the Debian GNU/Linux system (but may be used by others). March 26, 2003 EXIGREP(8)