From owner-freebsd-stable Fri Dec 8 20:16:54 2000 From owner-freebsd-stable@FreeBSD.ORG Fri Dec 8 20:16:52 2000 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from hurlame.pdl.cs.cmu.edu (HURLAME.PDL.CS.CMU.EDU [128.2.189.78]) by hub.freebsd.org (Postfix) with ESMTP id D3FAF37B400 for ; Fri, 8 Dec 2000 20:16:51 -0800 (PST) Received: (from magus@localhost) by hurlame.pdl.cs.cmu.edu (8.11.1/8.11.1) id eB94GcM17323; Fri, 8 Dec 2000 23:16:38 -0500 (EST) (envelope-from magus) Sender: magus@hurlame.pdl.cs.cmu.edu To: Warner Losh Cc: "Steven D. Smith" , freebsd-stable@FreeBSD.ORG Subject: Re: Softupdates? References: <200012071528.KAA19604@gate1.health.state.ny.us> <200012080721.AAA10166@harmony.village.org> From: Nat Lanza Date: 08 Dec 2000 23:16:38 -0500 In-Reply-To: Warner Losh's message of "Fri, 08 Dec 2000 00:21:54 -0700" Message-ID: Lines: 17 User-Agent: Gnus/5.0807 (Gnus v5.8.7) XEmacs/21.1 (Channel Islands) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Warner Losh writes: > Briefly, they are a way of combining writes to disk so that fewer > writes happen for meta data. There's also the "and ordering writes so that the disk is left in a consistent state after each write, preventing filesystem damage in a crash without the slowdown associated with a synchronous filesystem" part, which I think is really most important. --nat -- nat lanza --------------------- research programmer, parallel data lab, cmu scs magus@cs.cmu.edu -------------------------------- http://www.cs.cmu.edu/~magus/ there are no whole truths; all truths are half-truths -- alfred north whitehead To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message