From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by finch.gentoo.org (Postfix) with ESMTPS id 9492C139083 for ; Thu, 7 Dec 2017 22:36:06 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 8C5A3E0FE9; Thu, 7 Dec 2017 22:36:00 +0000 (UTC) Received: from mout.gmx.net (mout.gmx.net [212.227.15.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id DC942E0FDB for ; Thu, 7 Dec 2017 22:35:59 +0000 (UTC) Received: from tp ([92.78.149.24]) by mail.gmx.com (mrgmx001 [212.227.17.190]) with ESMTPSA (Nemesis) id 0MF5FT-1eGoJs2OC3-00GJsH for ; Thu, 07 Dec 2017 23:35:47 +0100 Date: Thu, 7 Dec 2017 23:35:45 +0100 From: Frank Steinmetzger To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] OT: btrfs raid 5/6 Message-ID: <20171207223545.GC18433@tp> Mail-Followup-To: gentoo-user@lists.gentoo.org References: <5A218A49.3050004@youngman.org.uk> <20171206232829.GA5249@tp> <20171207001328.GC5249@tp> <20171207213755.GB18433@tp> <5A29B769.7030400@youngman.org.uk> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="lCAWRPmW1mITcIfM" Content-Disposition: inline In-Reply-To: <5A29B769.7030400@youngman.org.uk> User-Agent: Mutt 1.7.2; VIM - Vi IMproved 8.0 X-Provags-ID: V03:K0:OjoNCJkTNVfona5ZX5Xrs8k3jlTq0SpgdPqNMPoSyO8OBelxKoC Sb2GssptaZ9eHk7kJUe8bnlPKBM2sY3aYtgJH9rXHan3/CXmFzZr1UZOb6JatleEu3w0XI5 0fhM8d/XAa9tJIIa+9hUq7gTnnfzDt5zzjJTTnEEczp6DrIxPCGnPpA0YZBUFCQFX+IQtcj c+HKo0wlRkvF1gwkPl4SA== X-UI-Out-Filterresults: notjunk:1;V01:K0:9aidhpLJqHY=:+YbJWmkaqrDSxfS9BTlMf1 Rqp/BVs6jl0A0l6ulk0anJnrwE7SZuTW1uXSRMB1n8DjJU4pQBFeOGnm3mY5IqDmBV29GkUKg ns+pYsudszZkwjzBqzc+nXQLjy8jnyhraYeve1SA8sdxy1kQzTS0ScZS98EJaB7kcXv1MeREm W4QOqCaL504qMKe7zOzBNJzw0Ewcus6usULDgR8ElBNs+9hCPQlBdC/faEiRI3hiTva253hNC 4cqgWHGZUZbJs9OL/arCYDZhoBZDJEDWmkzwwwbp9CUgz6ADaVdnhFmY2ecNGtNchyhimlnI4 rNvt15AGHuOguNXg+6CJFPTawWADEJ2gcs+9pYvS7kzx/c50aaeBeEnEEtinDAR1QiUZl6eA8 zG5jjV/p186QDUUQM2RUhxCgg52LyxL5xLhxQCXdlnqWRi6Kc+nM0aBgfCRwBVBu53DW6MR/M 5st3g7XGp+FVB1/+aw+u9X4ho6bUAViS8175oceE/Xn2MncWUkA3UkAldPr5fr7Hpq1GARZQ4 lTZSXaV9v55PD5iaQwsr3pi3rlN2c41kRjV5damD1TqMRC1aAs8Vd7QZUj4GI4iddSPtoIhkz lI4h0TquSrj2lRBaBWiztLfcLNREFy6HRoVpgrFCFN4ao+PdIPJm4t7u3ffY4HZUhd0KSwnZV Qrtd0kC/gSykeogr4TGaOjmnFfCIpFHaGtB4OLcQMQ94VGq7gosu/SUwQ4xUfhLN1LTAEcXE/ mbRguN6AIUvDyQ5u9iMDBE9JNjxvFzdcaY8meCdHeQiC9t1eW61rBifFmZKZbUlGXy7atrbVP hGIDydieT9Lt7mv6BWS/q8HMv9KAA== X-Archives-Salt: c2958515-1de6-4712-b832-94515d04478c X-Archives-Hash: c0e9fa4b4c228ed207dbf5669fed4b35 --lCAWRPmW1mITcIfM Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Dec 07, 2017 at 09:49:29PM +0000, Wols Lists wrote: > > So in case I ever need to send in a drive for repair/replacement, noone= can > > read from it (or only in tiny bits'n'pieces from a hexdump), because ea= ch > > disk contains a mix of data and parity blocks. > > > > I think I'm finally sold. :) > > And with that, good night. > > So you've never heard of LUKS? Sure thing, my laptop=E2=80=99s whole SSD is LUKSed and so are all my other= home and backup partitions. But encrypting ZFS is different, because every disk needs to be encrypted separately since there is no separation between the FS and the underlying block device. This will result in a big computational overhead, choking my poor Celeron. When I benchmarked reading from a single LUKS container in a ramdisk, it managed around 160 MB/s IIRC. I might give it a try over the weekend before I migrate my data, but I=E2=80=99m not expecting miracles. Should have boug= ht an i3 for that. > (Oh - and md raid-5/6 also mix data and parity, so the same holds true > there.) Ok, wasn=E2=80=99t aware of that. I thought I read in a ZFS article that th= is were a special thing. --=20 Gru=C3=9F | Greetings | Qapla=E2=80=99 Please do not share anything from, with or about me on any social network. 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