From owner-freebsd-hackers Mon Jul 8 12:31:39 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id MAA02153 for hackers-outgoing; Mon, 8 Jul 1996 12:31:39 -0700 (PDT) Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id MAA02136 for ; Mon, 8 Jul 1996 12:31:31 -0700 (PDT) Received: from sax.sax.de by irz301.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id VAA27995; Mon, 8 Jul 1996 21:24:06 +0200 Received: (from uucp@localhost) by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id VAA04300; Mon, 8 Jul 1996 21:24:05 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.7.5/8.6.9) id VAA01423; Mon, 8 Jul 1996 21:12:57 +0200 (MET DST) From: J Wunsch Message-Id: <199607081912.VAA01423@uriah.heep.sax.de> Subject: Re: async? soft updates? To: freebsd-hackers@freebsd.org (FreeBSD hackers) Date: Mon, 8 Jul 1996 21:12:56 +0200 (MET DST) Cc: hal@snitt.com (Hal Snyder) Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: <31e13be4.945083749@vogon.trans.sni-usa.com> from Hal Snyder at "Jul 8, 96 04:51:18 pm" X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E X-Mailer: ELM [version 2.4ME+ PL17 (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 As Hal Snyder wrote: > How exactly does async mount work? What is deferred, until when? `metadata' updates. Right now, updates to things like directory entries are done synchronously by default. That means, if you rm -r a large tree, the heads will become very noisy. Likewise, if you turn off the machine during a large file-creating process (untarring an archive for example), you'll end up with a bunch of files with zero length directory entries. -- The dir entries have been updated synchronously, but the file data itself didn't make it onto the disk yet. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)