From owner-freebsd-fs@FreeBSD.ORG Sat Apr 7 06:59:06 2007 Return-Path: X-Original-To: freebsd-fs@FreeBSD.org Delivered-To: freebsd-fs@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 5B07D16A402 for ; Sat, 7 Apr 2007 06:59:06 +0000 (UTC) (envelope-from arne_woerner@yahoo.com) Received: from web30302.mail.mud.yahoo.com (web30302.mail.mud.yahoo.com [209.191.69.64]) by mx1.freebsd.org (Postfix) with SMTP id 0BC6C13C44B for ; Sat, 7 Apr 2007 06:59:05 +0000 (UTC) (envelope-from arne_woerner@yahoo.com) Received: (qmail 36243 invoked by uid 60001); 7 Apr 2007 06:32:24 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-ID; b=ZBlG+fbf4BHN/zSBpPzZ5OvPFDt6LDpdy2SgaxarGcprui8Xlmj9DasUuuPulHpi04fkRxVaSOuRdbmmgxx/2ZE24wuXxI5uC7NUy1CuCmS/ambDe3mTBJ/yqC3g5/76jcWpkgKoIZG/UDM5v/cD8leQ32USDCp/VYF+TN9+enE=; X-YMail-OSG: pNSPDKMVM1kBpQ.dOWWgxL854ocNKOADXX2PuZwO3XpFtXkVtBNKSMP66FXLQT_9Rdk0Hm938WVsNNVJdhieyg8PbbJ6GscilMwnU0r_60k6S8YnbakgAjXJwQH5XA-- Received: from [213.54.189.69] by web30302.mail.mud.yahoo.com via HTTP; Fri, 06 Apr 2007 23:32:23 PDT Date: Fri, 6 Apr 2007 23:32:23 -0700 (PDT) From: "R. B. Riddick" To: Mike Wolman , freebsd-fs@FreeBSD.org, freebsd-questions@freebsd.org In-Reply-To: <20070407001555.G87655@nux.eros.office> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Message-ID: <219395.34786.qm@web30302.mail.mud.yahoo.com> Cc: Subject: Re: some thoughts about gmirror X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 07 Apr 2007 06:59:06 -0000 --- Mike Wolman wrote: > It could also be used for asynchronous mirrors over slow links, if the log > device was always written to first then the write latency for long distant > links could be removed. Im not sure if it would be possible to achieve > this using just a modified ggatec instead which has a local device used > as a write cache. > Sounds like rsync can already do that (I am not sure right now, if rsync can find updated areas within a large file, or if it just copies the while updated file even if it is a large one)... Furthermore the remote consumer of that gmirror couldnt be mounted RW, if it uses UFS, because UFS doesnt allow multiple RW mounts at the same time... -Arne ____________________________________________________________________________________ Food fight? Enjoy some healthy debate in the Yahoo! Answers Food & Drink Q&A. http://answers.yahoo.com/dir/?link=list&sid=396545367