From owner-freebsd-stable Sat Jul 7 21:53:23 2001 Delivered-To: freebsd-stable@freebsd.org Received: from wantadilla.lemis.com (wantadilla.lemis.com [192.109.197.80]) by hub.freebsd.org (Postfix) with ESMTP id C2A9537B401 for ; Sat, 7 Jul 2001 21:53:19 -0700 (PDT) (envelope-from grog@lemis.com) Received: by wantadilla.lemis.com (Postfix, from userid 1004) id 576B96ACBC; Sun, 8 Jul 2001 14:23:18 +0930 (CST) Date: Sun, 8 Jul 2001 14:23:18 +0930 From: Greg Lehey To: Dave Duchscher Cc: Dave Uhring , "Jim C. Nasby" , freebsd-stable@FreeBSD.ORG, Oliver Fromme Subject: Re: JFS Message-ID: <20010708142318.V80862@wantadilla.lemis.com> References: <200107071638.SAA19610@lurza.secnetix.de> <01070711475500.00362@dave> <3B476285.43347BA1@nasby.net> <000d01c1074e$49d31ba0$0300a8c0@uhring.com> <20010707185753.B27481@net.tamu.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20010707185753.B27481@net.tamu.edu>; from daved@tamu.edu on Sat, Jul 07, 2001 at 06:57:53PM -0500 Organization: The FreeBSD Project Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-418-838-708 WWW-Home-Page: http://www.FreeBSD.org/ X-PGP-Fingerprint: 6B 7B C3 8C 61 CD 54 AF 13 24 52 F8 6D A4 95 EF Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Saturday, 7 July 2001 at 18:57:53 -0500, Dave Duchscher wrote: > On Sat, Jul 07, 2001 at 08:35:35PM -0500, Dave Uhring wrote: >> >> You seem to have missed the critical point of that paper. When the >> system goes completely haywire and either crashes or locks up so hard >> that a manual reset is required, UFS/softupdates requires a substantial >> amount of time to run fsck. If you have a very large filesystem, you >> then have to w....a....i....t until fsck completes. And if you are >> lucky, it will not terminate with the suggestion that you run fsck by >> hand. With a true journalling filesystem this wait is obviated. The >> last transactions are rerun or truncated and the system boots up. > > Just to bring up a point, Softupdates will also avoid the long fsck at > boot. If I understand the papers I have read and with playing with > Softupdates on current, Softupdates leaves files system in a > consistent state so that the file-system can be mounted after a > crash/lockup/etc immediately and only a background fsck need be run to > free up left over pieces laying around. You're thinking of snapshotting, not soft updates. Greg -- See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message