From owner-freebsd-current@FreeBSD.ORG Fri May 27 04:00:45 2005 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BE61816A41C for ; Fri, 27 May 2005 04:00:45 +0000 (GMT) (envelope-from andy@siliconlandmark.com) Received: from lexi.siliconlandmark.com (lexi.siliconlandmark.com [209.69.98.4]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3D60443D48 for ; Fri, 27 May 2005 04:00:45 +0000 (GMT) (envelope-from andy@siliconlandmark.com) Received: from lexi.siliconlandmark.com (localhost [127.0.0.1]) by lexi.siliconlandmark.com (8.13.3/8.13.3) with ESMTP id j4R40geK069593; Fri, 27 May 2005 00:00:42 -0400 (EDT) (envelope-from andy@siliconlandmark.com) Received: from localhost (andy@localhost) by lexi.siliconlandmark.com (8.13.3/8.13.3/Submit) with ESMTP id j4R40gP9069590; Fri, 27 May 2005 00:00:42 -0400 (EDT) (envelope-from andy@siliconlandmark.com) X-Authentication-Warning: lexi.siliconlandmark.com: andy owned process doing -bs Date: Fri, 27 May 2005 00:00:42 -0400 (EDT) From: Andre Guibert de Bruet To: Scott Long In-Reply-To: <4296997C.9030700@samsco.org> Message-ID: <20050526235852.M54386@lexi.siliconlandmark.com> References: <4295D51F.50106@centtech.com> <429606D9.6080602@cs.tu-berlin.de> <42960ACB.7090801@cs.tu-berlin.de> <42960CFE.4060307@centtech.com> <42960F8F.2050109@samsco.org> <42961195.30608@centtech.com> <429613FB.80100@samsco.org> <42968AD4.3020603@centtech.com> <4296997C.9030700@samsco.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Information: Please contact the ISP for more information X-SL-MailScanner: Found to be clean X-SL-SpamCheck: not spam, SpamAssassin (score=-2.543, required 6, autolearn=not spam, AWL 0.06, BAYES_00 -2.60) X-MailScanner-From: andy@siliconlandmark.com Cc: FreeBSD Current Subject: Re: Disable read/write caching to disk? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 May 2005 04:00:45 -0000 On Thu, 26 May 2005, Scott Long wrote: > Chad Leigh -- Shire.Net LLC wrote: >> On May 26, 2005, at 8:49 PM, Eric Anderson wrote: >>> So it sounds dangerous, but not disastrous.. Sounds like soft- updates >>> would help this alot, so I'll turn them back on for this filesystem (I >>> typically do use it). >>> >>> At a minimum, it would be awesome to even have a way to do one host rw >>> and several doing ro. Think of the case of a web server farm, where it's >>> nearly all reads. >> >> use NFS or something. Not ideal but it allows you to have lots of clients >> using the same space without the disasters. > > NFS and Coda/AFS require that you have an intelligent node, i.e. a > computer, in front of each disk. The whole idea of a Fibre Channel > or iSCSI SAN is that you have a network of disks connected to a network > of computers, all able to communicate with each other and not have to > be fronted by a computer. This is quite important for high-availability > storage networks that want the reliability and scalability of not having > a single computer be the choke point or single-point-of-failure for a > particular set of data. Granted it's still somewhat of a niche, but as > persistent storage and data mining become more part of the mainstream, > it'll start becoming very important. Right now FreeBSD simply isn't an > option, while Solaris, NT, and Linux are. Fair enough. So the question becomes: What are the Linux folks doing that we aren't and how? Andy /* Andre Guibert de Bruet * 6f43 6564 7020 656f 2e74 4220 7469 6a20 */ /* Code poet / Sysadmin * 636f 656b 2e79 5320 7379 6461 696d 2e6e */ /* GSM: +1 734 846 8758 * 5520 494e 2058 6c73 7565 6874 002e 0000 */ /* WWW: siliconlandmark.com * Tormenting bytes since 1980. */