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Date:      Fri, 13 Jan 2006 15:44:51 -0500
From:      Kris Kennaway <kris@obsecurity.org>
To:        fbsd_user <fbsd_user@a1poweruser.com>
Cc:        Crispy Beef <crispy.beef@ntlworld.com>, freebsd-questions@freebsd.org
Subject:   Re: 4.6-RELEASE to 6.0-RELEASE...
Message-ID:  <20060113204450.GF47416@xor.obsecurity.org>
In-Reply-To: <MIEPLLIBMLEEABPDBIEGAEFMHLAA.fbsd_user@a1poweruser.com>
References:  <43C540A1.7060805@ntlworld.com> <MIEPLLIBMLEEABPDBIEGAEFMHLAA.fbsd_user@a1poweruser.com>

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On Wed, Jan 11, 2006 at 02:08:11PM -0500, fbsd_user wrote:
> There is a new and faster file system which is introduced in
> release-5.4.

Performance benefits weren't a goal of UFS2.  If your disk hardware is
fast enough (i.e. not crappy ATA hardware) you might see a small
performance boost, as I did in my tests.  The cause of this isn't
well-understood, i.e. it seems to be a side-effect of something else.
The cost is that UFS2 performs more disk I/O than UFS1, which means
that if your disk hardware is already saturated (see: aforementioned
crappy ATA hardware), it may actually be slower.

Kris

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