Date: Fri, 10 Dec 1999 12:59:31 -0500 (EST) From: "Crist J. Clark" <cjc@cc942873-a.ewndsr1.nj.home.com> To: zzhang@cs.binghamton.edu (Zhihui Zhang) Cc: dnelson@emsphone.com (Dan Nelson), ben@scientia.demon.co.uk (Ben Smithurst), cjclark@home.com, freebsd-questions@FreeBSD.ORG Subject: Re: hopefully three simple questions Message-ID: <199912101759.MAA63373@cc942873-a.ewndsr1.nj.home.com> In-Reply-To: <Pine.GSO.3.96.991210073822.9075A-100000@sol.cs.binghamton.edu> from Zhihui Zhang at "Dec 10, 1999 07:40:03 am"
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Zhihui Zhang wrote,
>
> On Thu, 9 Dec 1999, Dan Nelson wrote:
>
> > In the last episode (Dec 09), Zhihui Zhang said:
> > > On Thu, 9 Dec 1999, Ben Smithurst wrote:
> > > > Crist J. Clark wrote:
> > > > > Zhihui Zhang wrote,
> > > > >
> > > > >> (2) How to find the largest directory in a filesystem? I mean
> > > > >> the one with the maximum number of files in it.
> > >
> > > I have found a solution (hopefully correct):
> > >
> > > # find / -type d -ls | awd '{print $2, $11}' | sort -n | tail
> > >
> > > -Zhihui
> >
> > The "size" of the directory printed by 'find' does not always indicate
> > how many files are in it. If you fill a directory with files and then
> > delete every other file, it won't be able to compact out the empty
> > slots. You'll have to walk the entire directory tree and count the
> > files in each subdirectory, I'm afraid.
> >
> Yes! If you do a rm * under a directory, the directory size remains the
> same until next time you do a lookup operation on it. It is a good point!
An even better point is that the size of the directory is also a
function of the length of the filenames it holds. For example,
% mkdir test1 test2
% touch test1/{00,01,02,03,04,05,06,07,08,09,10,11,12,13,14,15,16,17,18,19}
% touch test2/AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA{0,1,2,3,5}
% ls -A test1 | wc -l
20
% ls -A test2 | wc -l
5
% ls -ld test?
drwxrwxr-x 2 cjc staff 512 Dec 10 12:48 test1
drwxrwxr-x 2 cjc staff 1024 Dec 10 12:49 test2
Even though test2 has fewer files, it's bigger.
--
Crist J. Clark cjclark@home.com
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