From owner-freebsd-fs@freebsd.org Wed Dec 14 00:34:07 2016 Return-Path: Delivered-To: freebsd-fs@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 F0D84C743AA; Wed, 14 Dec 2016 00:34:07 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: from mail-wj0-x230.google.com (mail-wj0-x230.google.com [IPv6:2a00:1450:400c:c01::230]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 86FF31C84; Wed, 14 Dec 2016 00:34:07 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: by mail-wj0-x230.google.com with SMTP id xy5so6001829wjc.0; Tue, 13 Dec 2016 16:34:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=cLJHsTtdEqaW3+fNMrFHwZ1gNVoD5TT9QA3HXXnwFMw=; b=dOwJdcb1CedKBW9Ea/w05pwZ8jeAw+aO4UlXN3foFQBNxmzR+BfYVISp+kD174/YwW C2KO3uF9fJN5ZkzB1+jnBLTSgww9arGNCRSkNa30hOLujxftvieMw2Ww6qBv7WqRBKKu 1jrn9bMgfpoNxWsOEIKK7FGO5Kbb6MGrHIV56YfNZQwZTXA/nSYU9jzQYDIhOW+0ot/S DzSnWVCSd0zg19xx+RmT4sHZzpBIAp1cEjxA3IGS9a1MafVpT3sJTtkRyrIKj9lcGWQB K559XDUrrm1W+5ewzI4fnxeySsDproRfmK2SCEZXrOUrsO5kP4X/gjHQUE7qKLI52eKj h9Lg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=cLJHsTtdEqaW3+fNMrFHwZ1gNVoD5TT9QA3HXXnwFMw=; b=SBnCsvUzcTp+hAUveyZR/iVjfrvJDj2Cx/Aiu6x6ECXFiQFZz6lW1hZxFpEYL2jqQb btSRBFXnF/wWYYquDUddh7ZVbhp8qcYl9Zd7w1X4U5v/zZNI7NgOw+AaXnriD9vKH23T c4pC3iRZ6hoF/Oh1JYP3r9v0IDrtjrHfFtA+S3WR4V4NiEm73Q+v5LFsexub0YCmXsgb tjcKH6OjpJgrA0343mbNczymyzy1ERELjHi6oZs+Mfu3NbjE4xbpjfoxyLstEMv4Zv2x U/dlCp7mq2xqqdC5BqfpeyZgqUHaY2ofbXbNchlwX2rh/p/gTAEzeEcszTNCJiOYttc6 teRw== X-Gm-Message-State: AKaTC02+jagxljIXaeH34WthXYU29eXTugjCR/FCAMzVBqLJmojQDbTm4kfReTdXRgvTj2pvOS6+FZPlds2AtA== X-Received: by 10.28.29.23 with SMTP id d23mr4711170wmd.91.1481675645237; Tue, 13 Dec 2016 16:34:05 -0800 (PST) MIME-Version: 1.0 Received: by 10.80.169.195 with HTTP; Tue, 13 Dec 2016 16:34:04 -0800 (PST) In-Reply-To: References: From: Adam Vande More Date: Tue, 13 Dec 2016 18:34:04 -0600 Message-ID: Subject: Re: Re-sparse a file-backed IO device + zfs To: javocado Cc: FreeBSD virtualization , FreeBSD Questions , FreeBSD Filesystems Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.23 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Dec 2016 00:34:08 -0000 On Mon, Dec 12, 2016 at 7:20 PM, javocado wrote: > Hi, > > I'm setting up a bhyve wherein: > > host # truncate -s 1T vol.file > host # du -ah vol.file > 200K vol.file > > host # /usr/sbin/bhyve ... -s 4,ahci-hd,vol.file ... > > Then inside the bhyve I create a zpool (ada0 = vol.file): > > bhyve # zpool create -O devices=off -O atime=off -O compression=on -m > /mnt/data1 data1 ada0 > I think there used to be a utility called sparsify. -- Adam