Date: Fri, 28 Sep 2001 14:41:46 -0700 From: Kris Kennaway <kris@obsecurity.org> To: Alessandro de Manzano <ale@unixmania.net> Cc: Sean Chittenden <sean@chittenden.org>, Kris Kennaway <kris@obsecurity.org>, stable@FreeBSD.org Subject: Re: dirpref gives massive performance boost Message-ID: <20010928144146.A16221@xor.obsecurity.org> In-Reply-To: <20010928233800.B29391@libero.sunshine.ale>; from ale@unixmania.net on Fri, Sep 28, 2001 at 11:38:00PM %2B0200 References: <20010928141246.A15515@xor.obsecurity.org> <20010928232009.A29187@libero.sunshine.ale> <20010928142611.A15946@xor.obsecurity.org> <20010928143016.H29974@rand.tgd.net> <20010928233800.B29391@libero.sunshine.ale>
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--OgqxwSJOaUobr8KG Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Sep 28, 2001 at 11:38:00PM +0200, Alessandro de Manzano wrote: > On Fri, Sep 28, 2001 at 02:30:16PM -0700, Sean Chittenden wrote: >=20 > > > Well, you need to wipe the disk so that when you restore it can lay > > > things out optimally from the start. > >=20 > > But turning on soft-updates should be sufficient to get these performan= ce=20 > > boosts from this point on, correct? -sc >=20 > AFAIK SU is not related to the physical layout of data on disk, this is > the work of UFS_DIRHASH. No, that's something different. # Directory hashing improves the speed of operations on very large # directories at the expense of some memory. # Warning: this is experimental code! options UFS_DIRHASH The changes to dirpref are an improved on-disk layout policy for directories (and files?) It's enabled by default because there's no downside. Kris --OgqxwSJOaUobr8KG Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (FreeBSD) Comment: For info see http://www.gnupg.org iD8DBQE7tO6aWry0BWjoQKURAggJAJ9sZPI/w/SL1XeeVn4q6RMGAX2JTwCeLNqu /6Vqz/tySKfiksW6rlfYtMw= =mnFq -----END PGP SIGNATURE----- --OgqxwSJOaUobr8KG-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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