From owner-freebsd-questions@FreeBSD.ORG Wed May 27 20:37:00 2015 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 5B63B5F1 for ; Wed, 27 May 2015 20:37:00 +0000 (UTC) (envelope-from chad@shire.net) Received: from mail.shire.net (mail.shire.net [199.102.78.250]) by mx1.freebsd.org (Postfix) with ESMTP id 3D6E5E44 for ; Wed, 27 May 2015 20:36:59 +0000 (UTC) (envelope-from chad@shire.net) Received: from 50-73-39-30-utah.hfc.comcastbusiness.net ([50.73.39.30] helo=[172.16.1.74]) by mail.shire.net with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1Yxi4R-000DmI-G6 for freebsd-questions@freebsd.org; Wed, 27 May 2015 14:36:59 -0600 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2098\)) Subject: Re: ZFS in a VM? From: "Chad Leigh Shire.Net LLC" In-Reply-To: Date: Wed, 27 May 2015 14:36:58 -0600 Content-Transfer-Encoding: quoted-printable Message-Id: References: <9C96EB4B-A230-4A26-BDC3-067367A61E34@shire.net> To: "freebsd-questions@freebsd.org" X-Mailer: Apple Mail (2.2098) X-SA-Exim-Connect-IP: 50.73.39.30 X-SA-Exim-Mail-From: chad@shire.net X-SA-Exim-Scanned: No (on mail.shire.net); SAEximRunCond expanded to false X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 May 2015 20:37:00 -0000 > On May 27, 2015, at 1:41 PM, Jaime Kikpole = wrote: >=20 > On Wed, May 27, 2015 at 3:39 PM, Chad Leigh Shire.Net LLC > wrote: >> I do. I do it not so much for any performance benefits, if any, ZFS = offers, but more for data integrity. >=20 > Exactly what I was looking for, too. >=20 >=20 >> You need to tune it since the VM based disks are not the same as = physical disks. >=20 > I'm afraid that I don't understand. Can you explain what you mean by = "tune it?" There are various kernel =E2=80=9Ctunables=E2=80=9D (aka =E2=80=9Ckernel = state=E2=80=9D, settable =E2=80=9Cvariables=E2=80=9D in the kernel, see = =E2=80=9Cman sysctl=E2=80=9D) that affect ZFS. =20