Slow directory access with lots of files

[Kris Kennaway]

On Mon, Jan 17, 2005 at 09:34:25PM +0100, Miguel Mendez wrote:
> On Mon, 17 Jan 2005 11:13:43 -0800
> Kris Kennaway <kris at obsecurity.org> wrote:
> 
> Hi,
> 
> > Do you have UFS_DIRHASH in your kernel?  If you don't, or if you added
> > it after the disk was already populated, you'll see the benefits if
> > you dump, wipe and restore the disk.
> 
> Could you elaborate on that? My impression has always been that dirhash
> does all its magic in memory, without persistant data stored on disk.

No.  It's an optimized method for laying out the data on disk.  I
think you're confusing it with softupdates, but that still doesn't
work entirely that way.

Kris
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