From owner-freebsd-questions@FreeBSD.ORG Thu Oct 20 20:25:51 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org 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 8EAE316A41F for ; Thu, 20 Oct 2005 20:25:51 +0000 (GMT) (envelope-from gayn.winters@bristolsystems.com) Received: from bristolsystems.com (h-68-167-239-98.lsanca54.covad.net [68.167.239.98]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4994643D5A for ; Thu, 20 Oct 2005 20:25:50 +0000 (GMT) (envelope-from gayn.winters@bristolsystems.com) Received: from workdog ([192.168.1.201]) by bristolsystems.com (8.11.6/8.11.6) with ESMTP id j9KKPon10394; Thu, 20 Oct 2005 13:25:50 -0700 From: "Gayn Winters" To: "'Andrew P.'" , "'user'" Date: Thu, 20 Oct 2005 13:24:20 -0700 Message-ID: <003201c5d5b4$753f9d20$c901a8c0@workdog> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4024 In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Importance: Normal Cc: freebsd-questions@freebsd.org Subject: RE: FreeBSD UFS2 snapshots, and math ... X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: gayn.winters@bristolsystems.com List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Oct 2005 20:25:51 -0000 > -----Original Message----- > From: owner-freebsd-questions@freebsd.org > [mailto:owner-freebsd-questions@freebsd.org] On Behalf Of Andrew P. > Sent: Thursday, October 20, 2005 12:35 PM > To: user > Cc: freebsd-questions@freebsd.org > Subject: Re: FreeBSD UFS2 snapshots, and math ... > Imagine that each data block is marked with labels > on change. It doesn't matter how many labels there > are, there will be only one data block saved. In trying to follow this thread, I started looking around for a precise definition of snapshot. Man mksnap_ffs wasn't too helpful, and googling for "snapshot" etc. wasn't fruitful. I'm guessing that the original author of the thread (user at dhp.com) may also need such a definition. Can someone provide a pointer to a specification or at least an RFC-like paper? Thanks, -gayn