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Full Discussion: Fields in the Output of ls -ltr for a directory
Top Forums Shell Programming and Scripting Fields in the Output of ls -ltr for a directory Post 303023216 by apmcd47 on Thursday 13th of September 2018 04:42:02 AM
Old 09-13-2018
Quote:
Originally Posted by infernalhell
Thank You, it is on network.

By Size in Blocks - would this give an idea of how much size it occupies in GB ?

But i see the parent directory of this dir has a lower block size.. So i am a little confused.


Code:
cd /prod/
@:/prod #ls -ld logs
drwxrwsr-x   28 xyz  abc   134217728 Sep 12 17:49 logs
@:/prod #cd logs
@:/prod/logs #ls -ld job
drwxrwsr-x 4294967295 xyz abc  2147614720 Sep 12 17:49 job

The size of the directory is not the size of the blocks, but rather the product of blocksize and number of blocks used. Consider this on my system:
Code:
$ echo > file
$ mkdir dir
$ ls -ld file dir
drwxr-xr-x 2 apm sog 4096  13-Sep 09:15 dir
-rw-r--r-- 1 apm sog    1  13-Sep 09:14 file
$ du file dir
4	file
4	dir
$ du -b file dir
1	file
4096	dir

Both file and dir occupy a single 4096 byte-sized block. ls shows the size of the file regardless of the amount of disk space it occupies. The directory, on the other hand, appears to fit the block it occupies. As you add more to the file it grows until it occupies two, three, or even twenty blocks. Think of the directory as look-up table, containing two fields per record: the name of the file it "contains", and the files inode number. As you add files to the directory it fills up the table until there is no more room, at which point it will grow into a second block. Now look at the number of links if your two directories. Evidently job contains more files than logs, requiring it to use more disk space Hence the discrepancy.

I should point out that I don't know the full workings of file systems; I don't really need to. The above assumptions just give me that warm, fuzzy feeling that I need to use them.

Andrew
 

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LEARN ABOUT DEBIAN

unburden-home-dir

UNBURDEN-HOME-DIR(1)						   User Commands					      UNBURDEN-HOME-DIR(1)

NAME

       unburden-home-dir - unburdens home directories from caches and trashes

SYNOPSIS

       unburden-home-dir [ -n | -u | -f filter ]
       unburden-home-dir ( -h | --help | --version )

DESCRIPTION

       unburden-home-dir  unburdens  the  home	directory from files and directory which cause high I/O or disk usage but are neither important if
       they are lost, e.g. caches or trash directory.

       When being run it moves the files and directories given in the configuration file to a location outside the home directory,  e.g.  /tmp	or
       /scratch, and puts appropriate symbolic links in the home directory instead.

OPTIONS

       -f     just  unburden those directory matched by the given filter (a perl regular expression) -- matches the already unburdened directories
	      if used together with -u.

       -F     Do not check for files in use with lsof before (re)moving files.

       -n     dry run (show what would be done)

       -u     undo (reverse the functionality and put stuff back into the home directory)

       -h, --help
	      show this help

       --version
	      show the program's version

EXAMPLES

       Example configuration files can be found at /usr/share/doc/unburden-home-dir/examples on Debian-based systems and in the etc/ directory	of
       the source tar ball.

FILES

       /etc/unburden-home-dir,	 /etc/unburden-home-dir.list,	~/.unburden-home-dir,  ~/.unburden-home-dir.list,  /etc/default/unburden-home-dir,
       /etc/X11/Xsession.d/95unburden-home-dir

       Read /usr/share/doc/unburden-home-dir/README on debianoid installations or README in the source tar ball for an explanation of these files.

SEE ALSO

       corekeeper (http://openvswitch.org/cgi-bin/gitweb.cgi?p=corekeeper), autotrash(1), agedu(1), bleachbit(1).

       For du(1)-like but more comfortable tools, see ncdu(1) (text-mode), baobab(1) (GNOME), filelight(1) (KDE), xdiskusage(1)  (X  tool  calling
       du(1) itself), or xdu(1) (X tool reading du(1) output from STDIN).

AUTHOR

       Unburden Home Dir is written and maintained by Axel Beckert <beckert@phys.ethz.ch>

LICENSE

       Unburden Home Dir is available under the terms of the GNU General Public License (GPL) version 2 or any later version at your option.

Unburden Home Directory 					     May 2012						      UNBURDEN-HOME-DIR(1)
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