From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ee0-f47.google.com ([74.125.83.47]:43232 "EHLO mail-ee0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753447AbaA0Nxk (ORCPT ); Mon, 27 Jan 2014 08:53:40 -0500 Received: by mail-ee0-f47.google.com with SMTP id d49so2245609eek.6 for ; Mon, 27 Jan 2014 05:53:39 -0800 (PST) Received: from [192.168.7.7] (a207.net131.okay.pl. [85.28.131.207]) by mx.google.com with ESMTPSA id a8sm36885465eeo.3.2014.01.27.05.53.37 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 27 Jan 2014 05:53:38 -0800 (PST) Message-ID: <52E664E0.5070909@gmail.com> Date: Mon, 27 Jan 2014 14:53:36 +0100 From: KC MIME-Version: 1.0 To: linux-btrfs@vger.kernel.org Subject: Snapshots =?windows-1252?Q?=96_noob_questions?= Content-Type: text/plain; charset=windows-1252; format=flowed Sender: linux-btrfs-owner@vger.kernel.org List-ID: I have been trying to understand how snapshots work (in BRTFS and in general), but I still have some questions, and would appreciate if someone could clear them for me. To make things easier, I tried to make most of them Yes/No questions: 1. When creating the filesystem, I only made btrfs partition with no subvolumes. Do I have to use subvolumes, or can I snapshot entire “/“? 2. Can I take a snapshot of a working / root filesystem? 3. If I make a snapshot of / and there are some separate partitions mounted under /mnt/ or /home/, will snapshot skip them? 4. If I have a snapshot of /, can I completely erase this partition and later restore it in full form that snapshot, or do snapshots work only if a limited number of files has been changed? If the former, then does it mean that snapshot size will be comparable to the original data size? 5. Can a snapshot be stored on a different partition? And if so, does that partition have to be BTRFS too? I ask, because I would also want to store snapshots in a cloud storage. Thanks.