On Sun, Nov 09, 2008 at 10:35:21AM +0100, Erik Trulsson wrote: > On Sat, Nov 08, 2008 at 06:40:46PM -0800, Jeremy Chadwick wrote: > > On Sun, Nov 09, 2008 at 01:40:51AM +0000, [EMAIL PROTECTED] wrote: > > > Hi, > > > I have a FreeBSD server that has about 10,500 subdirectories within a > > > single > > > directory. > > > This number will keep rising and I assume UFS2 has a limit to the number > > > of > > > sub-directories in a single directory - can anyone tell me what it is? > > > > As far as I know, there is no such limit on the number of files/dirs > > inside of a directory. > > Actually there is. Each i-node on the disk contains a field telling how > many hard-links point to that inode. This field is a (signed) 16-bit value, > meaning the maximum number of hardlinks allowed is 32767. > Each subdirectory created contains a hardlink ('..') to its parent, thus > limiting the number of subdirectories to a single directory to less than > 32767.
I hadn't even thought of that (the inode possibility did cross my mind, but I figured inode counts would a) apply to the filesystem as a whole, and b) apply to both files and directories. Wow, thanks for the tip! Learning something new every day... :-) > Note that this does not limit the number of files you can have in a single > directory, since normal files do not contain hardlinks to the parent > directory, but there are of course limits to the total number of files and > directories you can have on a single filesystem based on how many inodes > were created when the filesystem was first created. -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB | _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"