From owner-freebsd-hackers Tue Dec 24 17:29:19 1996 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.4/8.8.4) id RAA21717 for hackers-outgoing; Tue, 24 Dec 1996 17:29:19 -0800 (PST) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by freefall.freebsd.org (8.8.4/8.8.4) with ESMTP id RAA21711 for ; Tue, 24 Dec 1996 17:29:16 -0800 (PST) Received: (from msmith@localhost) by genesis.atrad.adelaide.edu.au (8.8.2/8.7.3) id LAA21213; Wed, 25 Dec 1996 11:59:00 +1030 (CST) From: Michael Smith Message-Id: <199612250129.LAA21213@genesis.atrad.adelaide.edu.au> Subject: Re: mount -o noatime unsupported in -current? In-Reply-To: from Andreas Klemm at "Dec 24, 96 02:27:35 pm" To: andreas@klemm.gtn.com (Andreas Klemm) Date: Wed, 25 Dec 1996 11:58:59 +1030 (CST) Cc: joerg_wunsch@uriah.heep.sax.de, freebsd-hackers@freebsd.org, mrcpu@cdsnet.net X-Mailer: ELM [version 2.4ME+ PL28 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Andreas Klemm stands accused of saying: > > > > Yes, i'm using it often before rm -r'ing a large subhierarchy (and > > ``mount -o noasync -u'' later). > > Yes, this is a nice trick ;) Then rm -rf works like hell ;-)) > It's blindly fast and very dangerous ;) Actually, I've crashed any number of boxes using '-o async' and have yet to lose anything substantial. We don't ship with it because fsck tends to get a bit unhappy about it, and talking a customer through a manual fsck can be a pain, but internally we use it all the time; IMHO the performance advantage for things like large CVS operations and big deletions is a fair tradeoff against the possible risk of having to restore from backup. > andreas@klemm.gtn.com /\/\___ Wiechers & Partner Datentechnik GmbH -- ]] Mike Smith, Software Engineer msmith@gsoft.com.au [[ ]] Genesis Software genesis@gsoft.com.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control. (ph) +61-8-8267-3493 [[ ]] Unix hardware collector. "Where are your PEZ?" The Tick [[