Can I speed up my grep command? Post: 302861897

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Top Forums Shell Programming and Scripting Can I speed up my grep command? Post 302861897 by Don Cragun on Wednesday 9th of October 2013 08:47:07 PM

10-09-2013

Registered User

I assume that by now you have figured out how to find where the MKS toolkit utilities are on your ssytem again... If not, we probably can't help you.

With a Windows operating system that old and an MKS toolkit that is even older, you probably have a 16-bit shell (which leaves you with a relatively limited address space). With 30,000+ files to process, there is a fair chance that you'll overflow the shell size limit on the contents of a shell variable even if less than 10% of your xml files contain the string you're looking for. Therefore, I'd strongly suggest saving the list of files found in a file instead of in a shell variable.

Code:

find . -name "*.xml" -print | xargs fgrep -l Status > StatusXF.txt

and show us any diagnostic output produced. With any luck, StatusXF.txt will contain the list of files you want and won't take forever to run.

Don Cragun

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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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