find files older than 30 days old Post: 302533544

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Top Forums UNIX for Advanced & Expert Users find files older than 30 days old Post 302533544 by hnrz on Friday 24th of June 2011 03:19:24 AM

06-24-2011

Registered User

If the version of find being used supports it, I usually use the -delete option as it is usually even faster. Implementations differ but usually the -exec option of find does a fork() and then an execvp(), and then waits on the child process. It starts a child process for each file which makes it slow. xargs does the same thing but calls vfork() and concatenates the argument list and usually only creates one child process. The -delete option simply does an rmdir() or unlink() as it is walking the filesystem tree and it is usually as fast or faster than xargs in my experience. Also by using -delete you don't run into the number of arguments hard limit that xargs imposes (or rather execvp(3)). By default, -delete deletes both files and directories, so if the intention is only to delete files, the -type parameter must also be specified. Of course, if it is a script that is being run often, it doesn't hurt to profile and determine which is best.

I usually do:

Code:

find . -type f -mtime +30 -delete

Last edited by hnrz; 06-24-2011 at 04:25 AM..

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LEARN ABOUT CENTOS

sysstat

SYSSTAT(5)							Linux User's Manual							SYSSTAT(5)

NAME

       sysstat - sysstat configuration file.

DESCRIPTION

       This  file is read by sa1(8) and sa2(8) shell scripts from the sysstat's set of tools.  It consists of a sequence of shell variable assign-
       ments used to configure sysstat logging.  The variables and their meanings are:

       HISTORY
	      The number of days during which a daily data file or a report should be kept. Data files or reports older than this number  of  days
	      will be removed by the sa2(8) shell script.

       COMPRESSAFTER
	      Number of days after which daily data files are to be compressed, either by gzip or bzip2.

       SADC_OPTIONS
	      Options  that  should be passed to sadc(8).  With these options (see sadc(8) manual page), you can select some additional data which
	      are going to be saved in daily data files.  These options are used only when a new data file is created. They will be  ignored  with
	      an already existing one.

FILES

       /etc/sysconfig/sysstat

AUTHOR

       Sebastien Godard (sysstat <at> orange.fr)

SEE ALSO

       sadc(8), sa1(8), sa2(8)

       http://pagesperso-orange.fr/sebastien.godard/

Linux								  SEPTEMBER 2010							SYSSTAT(5)

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