From owner-freebsd-questions@FreeBSD.ORG Wed May 7 05:29:59 2003 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 3830A37B401 for ; Wed, 7 May 2003 05:29:59 -0700 (PDT) Received: from pa-plum1b-166.pit.adelphia.net (pa-plum1a-215.pit.adelphia.net [24.53.170.215]) by mx1.FreeBSD.org (Postfix) with ESMTP id 65E6943F93 for ; Wed, 7 May 2003 05:29:56 -0700 (PDT) (envelope-from wmoran@potentialtech.com) Received: from potentialtech.com (working [172.16.0.95]) h47CTs0n009393; Wed, 7 May 2003 08:29:54 -0400 (EDT) (envelope-from wmoran@potentialtech.com) Message-ID: <3EB8FC42.9030000@potentialtech.com> Date: Wed, 07 May 2003 08:29:54 -0400 From: Bill Moran User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.3) Gecko/20030429 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Chris Pressey References: <3EB807B9.4070603@potentialtech.com> <20030507013130.48812aa0.cpressey@catseye.mb.ca> In-Reply-To: <20030507013130.48812aa0.cpressey@catseye.mb.ca> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit cc: freebsd-questions@freebsd.org Subject: Re: Realtime Filesystem Replication X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 May 2003 12:29:59 -0000 Chris Pressey wrote: > On Tue, 06 May 2003 15:06:33 -0400 > Bill Moran wrote: > > >>YOU wrote: >> >>>Thanks so far to the suggestions including rsync and unison. Both >>>appear to be triggered upon a command line or user typed command. Is >>>someone using a system that tracks the mtimes for files and updates >>>without prompt? >> >>Are you sure you really need _realtime_? That's a pretty tall order, >>and I don't know of anything that can provide it. > > Purely out of curiousity, would it even be technically possible? Would > kevents be the thing to handle something like this, or would they be too > low-level? Not 100% sure. It would be an interesting research project if I could find time to try it out. I have some theories as to how to make it work, and I suspect that it's possible. I worry that it's not practical, however, that it will be too slow to actually use. -- Bill Moran Potential Technologies http://www.potentialtech.com