From owner-freebsd-emulation@freebsd.org Wed Nov 16 15:04:40 2016 Return-Path: Delivered-To: freebsd-emulation@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 87153C4324E for ; Wed, 16 Nov 2016 15:04:40 +0000 (UTC) (envelope-from hausen@punkt.de) Received: from kagate.punkt.de (kagate.punkt.de [217.29.33.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 245161FE3 for ; Wed, 16 Nov 2016 15:04:39 +0000 (UTC) (envelope-from hausen@punkt.de) Received: from hugo10.ka.punkt.de (hugo10.ka.punkt.de [217.29.44.10]) by gate2.intern.punkt.de with ESMTP id uAGEl5vg060587 for ; Wed, 16 Nov 2016 15:47:05 +0100 (CET) Received: from [217.29.44.220] ([217.29.44.220]) by hugo10.ka.punkt.de (8.14.2/8.14.2) with ESMTP id uAGEl5Ki081038 for ; Wed, 16 Nov 2016 15:47:05 +0100 (CET) (envelope-from hausen@punkt.de) From: "Patrick M. Hausen" Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Subject: bhyve: zvols for guest disk - yes or no? Message-Id: Date: Wed, 16 Nov 2016 15:47:05 +0100 To: freebsd-emulation@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) X-Mailer: Apple Mail (2.3124) X-BeenThere: freebsd-emulation@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Development of Emulators of other operating systems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Nov 2016 15:04:40 -0000 Hi, all, we are just starting a project that will run a couple of Ubuntu guests on top of bhyve instead of ESXi that we used in the past. As far as I could find out, more or less all bhyve manager/wrapper tools use zvols as the backing store for "raw" guest disk images. I looked at * chyves * iohyve * vm-bhyve So far so good. Yet, this blog article has some very valid (IMHO) points against using them: http://jrs-s.net/2016/06/16/psa-snapshots-are-better-than-zvols Another thing I'm pondering is: wouldn't it be better to run on UFS so you can dedicate as much memory as possible to VMs? So I'm a bit puzzled now on what to do. Any opinions, experiences, war stories to share? Thanks Patrick --=20 punkt.de GmbH * Kaiserallee 13a * 76133 Karlsruhe Tel. 0721 9109 0 * Fax 0721 9109 100 info@punkt.de http://www.punkt.de Gf: J=C3=BCrgen Egeling AG Mannheim 108285