From owner-freebsd-questions Mon Nov 17 11:25:16 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id LAA05351 for questions-outgoing; Mon, 17 Nov 1997 11:25:16 -0800 (PST) (envelope-from owner-freebsd-questions) Received: from gdi.uoregon.edu (gdi.uoregon.edu [128.223.170.30]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id LAA05344 for ; Mon, 17 Nov 1997 11:25:10 -0800 (PST) (envelope-from dwhite@gdi.uoregon.edu) Received: from localhost (dwhite@localhost) by gdi.uoregon.edu (8.8.7/8.8.7) with SMTP id LAA10665; Mon, 17 Nov 1997 11:25:08 -0800 (PST) (envelope-from dwhite@gdi.uoregon.edu) Date: Mon, 17 Nov 1997 11:25:08 -0800 (PST) From: Doug White Reply-To: Doug White To: Greg Hormann cc: questions@FreeBSD.ORG Subject: Re: async fs? In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk On Mon, 17 Nov 1997, Greg Hormann wrote: > > Are you aware that losing your system while you are running async is > > usually fairly safe (often you lose no files, or if you were very busy > > doing disk activity, maybe a few), but if you are mounted async, you > > could possibly lose much, much more? It'll certainly increase > > performance, but you'd better be willing to pay the price. > > What *exactly* does async do? Does async I/O just mean that Meta data is > not immediately written to disk? I assume that FBSD buffers data, but > writes Meta data to disk immediately like most Unix file systems. Correct on both counts. Doug White | University of Oregon Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant http://gladstone.uoregon.edu/~dwhite | Computer Science Major