From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.kundenserver.de ([212.227.126.187]:58090 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751272AbbIOVeI (ORCPT ); Tue, 15 Sep 2015 17:34:08 -0400 Received: from durkon.lan ([178.201.238.189]) by mrelayeu.kundenserver.de (mreue004) with ESMTPSA (Nemesis) id 0MR97T-1ZBNdR1eaV-00Ud1A for ; Tue, 15 Sep 2015 23:34:06 +0200 Received: from xykon.lan (xykon.lan [192.168.2.42]) by durkon.lan (Postfix) with ESMTPSA id 669D28323 for ; Tue, 15 Sep 2015 23:34:04 +0200 (CEST) From: Gert Menke Subject: BTRFS as image store for KVM? To: linux-btrfs@vger.kernel.org Message-ID: <55F88ECC.1040604@menke.ac> Date: Tue, 15 Sep 2015 23:34:04 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Sender: linux-btrfs-owner@vger.kernel.org List-ID: Hi everybody, first off, I'm not 100% sure if this is the right place to ask, so if it's not, I apologize and I'd appreciate a pointer in the right direction. I want to build a virtualization server to replace my current home server. I'm thinking about a Debian system with libvirt/KVM. The system will have one or two SSDs and five harddisks with some kind of software RAID5 for storage. I'd like to have a filesystem with data checksums, so BTRFS seems like the right way to go. However, I read that BTRFS does not perform well as storage for KVM disk images. (See here: http://www.linux-kvm.org/page/Tuning_KVM ) Is this still true? I would appreciate any comments and/or tips you might have on this topic. Is anyone using BTRFS as an image store? Are there any special settings I should be aware of to make it work well? Thanks, Gert