From owner-freebsd-questions Sun Jul 9 15:51:14 2000 Delivered-To: freebsd-questions@freebsd.org Received: from relay2.inwind.it (relay2.inwind.it [212.141.53.73]) by hub.freebsd.org (Postfix) with ESMTP id CCC8237B59F for ; Sun, 9 Jul 2000 15:51:10 -0700 (PDT) (envelope-from bartequi@inwind.it) Received: from bartequi.ottodomain.org (212.141.78.18) by relay2.inwind.it; 10 Jul 2000 00:51:08 +0200 From: Salvo Bartolotta Date: Sun, 09 Jul 2000 23:51:55 GMT Message-ID: <20000709.23515500@bartequi.ottodomain.org> Subject: Re: Softupdates question To: "David J. Kanter" Cc: freebsd-questions@FreeBSD.ORG In-Reply-To: <20000709005612.A89313@localhost.localdomain> References: <20000709005612.A89313@localhost.localdomain> X-Mailer: SuperCalifragilis X-Priority: 3 (Normal) MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG >>>>>>>>>>>>>>>>>> Original Message <<<<<<<<<<<<<<<<<< On 7/9/00, 6:56:12 AM, "David J. Kanter" =20 wrote regarding Softupdates question: > I'm upgrading to 4.0 and the softupdates option looks particularly > attractive. I'd like to use it because of power outages. > My question is: Which filesystem(s) should softupdate be applied to?=20 All of > them? Or, are some better than others? What about the root filesystem?= =20 If > so, is it possible to umount all filesystems and run the tunefs=20 program? > -- > David Kanter > djkanter@northwestern.edu Dear David Kanter, If performance is your main concern, you may wish to enable=20 softupdates and the "noatime" option for all filesystems except for=20 "/". This last filesystem ("/") should (normally) be used only with=20 the "noatime" option. Just my 0.02 Euro to the pot :-) Incidentally, I seem to understand that softupdates, with respect to=20 e.g. J.F.S. (Journaling Filesystem), is even better (!). That is, it=20 is quicker, and, in case of problems, you only lose a rather limited=20 amount of data (related to the last 30 seconds or so of system activity)= .=20 For obscure reasons, softupdates has not received enough=20 /acknowledgements/emphasis/etc., and has been considered as a "minor"=20 substitute for JFS for quite a while ...=20 UPS devices, however, are cheaper and cheaper, so this should no=20 longer be an issue.=20 Best regards, Salvo To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message