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Date:      Sat, 29 Sep 2001 02:23:50 +0200
From:      Dennis Berger <Dennis.Berger@nipsi.de>
To:        Kris Kennaway <kris@obsecurity.org>
Cc:        stable@FreeBSD.org
Subject:   Re: dirpref gives massive performance boost
Message-ID:  <3BB51496.90E163A@nipsi.de>
References:  <20010928141246.A15515@xor.obsecurity.org>

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Does I have to specify anything while creating the new filesystem or are there
good default values.

Kris Kennaway wrote:

> Hi all,
>
> Just a note to those who have updated to 4.4-STABLE that it's well
> worth doing a backup + newfs + restore on all your UFS volumes.  The
> "dirpref" UFS changes which went in after 4.4-RELEASE give a
> significant performance boost to common filesystem operations.  For
> example:
>
> cvs update on my /usr/src from a local CVS repository used to take
> 1200 seconds, pre-dirpref.  It now takes 400 seconds - that's a factor
> of 3 faster on a real-world benchmark.  I forgot to time cvs update in
> ports before I newfs'ed, but I'd expect the performance gain to be
> even higher because the ports tree is chock full of directories.
>
> Truly impressive..
>
> Kris
>
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