From owner-freebsd-fs  Fri May  3 10:24:52 2002
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Date: Fri, 3 May 2002 10:24:46 -0700 (PDT)
From: Scott Hess <scott@avantgo.com>
To: Terry Lambert <tlambert2@mindspring.com>
Cc: "Vladimir B. Grebenschikov" <vova@sw.ru>, <fs@freebsd.org>
Subject: Re: Filesystem
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Looks to me like Vladimir's supposition is correct for FFS:

scott@ganja2:test> uname -a
FreeBSD ganja2.avantgo.com 4.5-RELEASE-p4 FreeBSD 4.5-RELEASE-p4 #0: Tue Apr 23 16:28:25 PDT 2002     
root@agdev2.avantgo.com:/avantgo/obj/avantgo/src/sys/GANJA  i386
scott@ganja2:test> perl -e 'for (my $ii = 0; 1; $ii++) { mkdir(sprintf("%06u", $ii), 0755) || die "$!";}'
Too many links at -e line 1.
scott@ganja2:test> ls | wc
   32765   32765  229355
scott@ganja2:test> ls -ld .
drwxr-xr-x  32767 scott  wheel  530944 May  3 10:23 .

[32767 is 32765 links from .. of subdirs, 1 for . of test, one for test in
parent directory.]

Later,
scott

On Fri, 3 May 2002, Terry Lambert wrote:
> "Vladimir B. Grebenschikov" wrote:
> > 
> > χ Thu, 02.05.2002, Χ 19:25, Zhihui Zhang ΞΑΠΙΣΑΜ:
> > > You can create as many entries as you want in a directory.
> > 
> > It is true only for files.
> > 
> > But original question was about subdirectories.
> > 
> > Actually there are limit on number of hardlinks for file(or dirs) and
> > this limit about 32k
> > 
> > Each subdirectory hardlinks it's '..' to parent directory so, you can't
> > create more then 32k subdirectories (it is true for 3.x)
> > but I don't know how with this problem on -STABLE and -CURRENT ?
> > 
> > Anybody knows ?
> 
> The limit you are complaining about are FAT/VFAT specific.
> 
> All FS's have their own limits.
> 
> In FFS, a directory is a file.  Therefore you are limited by
> the number of files.  THe number of files is limited by disk
> space and reserved space for inodes.
> 
> -- Terry
> 
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