From owner-freebsd-questions@FreeBSD.ORG Sun Jun 19 04:42:33 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B9E0416A41F for ; Sun, 19 Jun 2005 04:42:33 +0000 (GMT) (envelope-from lefty@ene.asda.gr) Received: from orfeas.asda.gr (orfeas.asda.gr [194.219.142.35]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5EF3A43D1D for ; Sun, 19 Jun 2005 04:42:33 +0000 (GMT) (envelope-from lefty@ene.asda.gr) Received: by orfeas.asda.gr (Postfix, from userid 58) id 2B3885C6E; Sun, 19 Jun 2005 07:42:32 +0300 (EEST) Received: from ene.asda.gr (ene.asda.gr [193.92.118.161]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "ene.asda.gr", Issuer "ASDA Root CA" (verified OK)) by orfeas.asda.gr (Postfix) with ESMTP id 1E9D45C51; Sun, 19 Jun 2005 07:42:31 +0300 (EEST) Received: by ene.asda.gr (Postfix, from userid 58) id 97FE11142F; Sun, 19 Jun 2005 07:42:30 +0300 (EEST) Received: from ene.asda.gr (marsias.asda.gr [194.219.142.36]) (using SSLv3 with cipher RC4-MD5 (128/128 bits)) (Client CN "Lefteris Tsintjelis", Issuer "ASDA Root CA" (verified OK)) by ene.asda.gr (Postfix) with ESMTP id 867C21141E; Sun, 19 Jun 2005 07:42:20 +0300 (EEST) Message-ID: <42B4F7A8.87B4AEA6@ene.asda.gr> Date: Sun, 19 Jun 2005 07:42:16 +0300 From: Lefteris Tsintjelis Organization: ASDA X-Mailer: Mozilla 4.8 [en] (Windows NT 5.0; U) X-Accept-Language: en,el MIME-Version: 1.0 To: Giorgos Keramidas References: <42B481D0.EFA31599@ene.asda.gr> <20050618203437.GA1966@gothmog.gr> Content-Type: text/plain; charset=iso-8859-7 Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 3.0.4 (2005-06-05) on ene.asda.gr X-Spam-Level: X-Spam-Status: score=-2.1 autolearn=ham tests=ALL_TRUSTED,AWL,BAYES_00 Cc: freebsd-questions@freebsd.org Subject: Re: Can't mount partitions with soft-updates enabled with async option X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: lefty@asda.gr List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 19 Jun 2005 04:42:33 -0000 Giorgos Keramidas wrote: > > Why would you want to do that? > > Soft-updates already provides most of the benefits of an async mount plus some > extra goodies, like never leaving the filesystem in an inconsistent state. Kalimera Giorgo, For boosting io speed to the max it can get. The system is very stable (no crashes whatsover) and UPS monitored and protected so chances of having an inconsistent filesystem are very low or am I wrong? (I am refering to an async mounted filesystem) > The speed gain of mounting a squid cache as async shouldn't really be that > big, but the guarantees of avoiding data loss when a filesystem is mounted > with softupdates are too big to ignore :-) Well, that would probably depend on the requests per second but for a pretty busy squid box (disk cache is already split to a few disks) and to keep things running even more smooth and optimal, this would probably boost the io performance further more (if I understood everything right). The reason I am thinking of switching to async mode is that I am getting some physical io page faults (very small percentage compared to the requests per second but still) and I am already using the noatime option with soft-updates of course.