From owner-freebsd-virtualization@FreeBSD.ORG Sat Feb 8 12:51:37 2014 Return-Path: Delivered-To: freebsd-virtualization@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 22B3EA3A for ; Sat, 8 Feb 2014 12:51:37 +0000 (UTC) Received: from mail-pb0-x232.google.com (mail-pb0-x232.google.com [IPv6:2607:f8b0:400e:c01::232]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id E61FC1960 for ; Sat, 8 Feb 2014 12:51:36 +0000 (UTC) Received: by mail-pb0-f50.google.com with SMTP id rq2so4368910pbb.23 for ; Sat, 08 Feb 2014 04:51:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=mvOTc2lmMW9YOVUD2eyziEpccp2/bMTJ0qhqvr9F320=; b=La5Nxdxn1Tz+L2pSau0qdoQtgI2lZHYkacNFOWapFJX6gxo4bi/ZhMv/JnTnshw3lB aOfrVaHC0NQv4+q1aFw/PBrLRzwu8g4cOBDHlLmf4djgBpOm0vzsV+dKBSadHujmori1 42fMtAPZq09KxREUrTTciTlH0JR4RwJr4Sw4i/8tRpUYWlsr4yOmbimfNoFzm7vIArd3 XcHE6hV3033AvZQ9R3hRl5zdZOavyAwuESaTy5mvEFFFkrna07lHWD8yrf8Vc6NicZzW dEpzO1n4OQeIXQ1dBrjJz5zdQT5+sErKhHT/l38O4c4CBG5GfQKN3J/Kmx5AMUbUsurr sBGQ== MIME-Version: 1.0 X-Received: by 10.66.192.74 with SMTP id he10mr14008781pac.126.1391863896534; Sat, 08 Feb 2014 04:51:36 -0800 (PST) Received: by 10.68.155.38 with HTTP; Sat, 8 Feb 2014 04:51:36 -0800 (PST) In-Reply-To: References: <52F5363D.8040102@freebsd.org> Date: Sat, 8 Feb 2014 07:51:36 -0500 Message-ID: Subject: Re: Report of my virtual network lab migrated from virtualbox to bhyve From: Aryeh Friedman To: Adam Vande More Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.17 Cc: FreeBSD virtualization X-BeenThere: freebsd-virtualization@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: "Discussion of various virtualization techniques FreeBSD supports." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 08 Feb 2014 12:51:37 -0000 On Sat, Feb 8, 2014 at 7:34 AM, Adam Vande More wrote: > > On Sat, Feb 8, 2014 at 5:42 AM, Aryeh Friedman wrote: >> >> bhyve (as far I know) disks must be one solid file (md backed) or a /dev >> block device... therefore it is unlikely the above would work >> > > The reported size would be identical so I don't see what the problem is. > bhyve blindly read/writes into the middle of the file without consulting the filesystem and thus bypassing any things like sparse fill in.... namely all you gain is a few seconds of startup time (matter of fact I think truncate might use sparse allocation [i.e. attempting to read into the middle with guest OS control will result in potentially seeing host data]) -- Aryeh M. Friedman, Lead Developer, http://www.PetiteCloud.org