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Full Discussion: Help need to improve performance :Parallel processing ideas
Top Forums Shell Programming and Scripting Help need to improve performance :Parallel processing ideas Post 302455201 by justchill on Tuesday 21st of September 2010 05:02:25 AM
Old 09-21-2010
Help need to improve performance :Parallel processing ideas
Hi,
Please tell me how to include parallel processing for the below code. Thanks in advance
I have a list of users directories in root directory. Each user has a directory by his /her username.
I am finding the size of each directorry using du -g command.. and checking if the size exceeds 3GB a limit.
The problem is that it takes around 30 minutes for around 1000 users.

Code:
for i in `ls -l | grep -i <username>`
do
du -g $i | awk '{if ($1 > 3) print $0}' >> size.txt
done

 

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LEARN ABOUT X11R4

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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