From owner-freebsd-questions@FreeBSD.ORG Wed Jan 14 23:20:56 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id F07321065676 for ; Wed, 14 Jan 2009 23:20:56 +0000 (UTC) (envelope-from rsmith@xs4all.nl) Received: from smtp-vbr16.xs4all.nl (smtp-vbr16.xs4all.nl [194.109.24.36]) by mx1.freebsd.org (Postfix) with ESMTP id 6CD8A8FC16 for ; Wed, 14 Jan 2009 23:20:56 +0000 (UTC) (envelope-from rsmith@xs4all.nl) Received: from slackbox.xs4all.nl (slackbox.xs4all.nl [213.84.242.160]) by smtp-vbr16.xs4all.nl (8.13.8/8.13.8) with ESMTP id n0ENKtLB052108; Thu, 15 Jan 2009 00:20:55 +0100 (CET) (envelope-from rsmith@xs4all.nl) Received: by slackbox.xs4all.nl (Postfix, from userid 1001) id 9F9C0BA9B; Thu, 15 Jan 2009 00:20:54 +0100 (CET) Date: Thu, 15 Jan 2009 00:20:54 +0100 From: Roland Smith To: RW Message-ID: <20090114232054.GB6422@slackbox.xs4all.nl> References: <20090114175954.GC97086@slackbox.xs4all.nl> <20090114225538.66e001de@gumby.homeunix.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="mxv5cy4qt+RJ9ypb" Content-Disposition: inline In-Reply-To: <20090114225538.66e001de@gumby.homeunix.com> X-GPG-Fingerprint: 1A2B 477F 9970 BA3C 2914 B7CE 1277 EFB0 C321 A725 X-GPG-Key: http://www.xs4all.nl/~rsmith/pubkey.txt X-GPG-Notice: If this message is not signed, don't assume I sent it! User-Agent: Mutt/1.5.18 (2008-05-17) X-Virus-Scanned: by XS4ALL Virus Scanner Cc: freebsd-questions@freebsd.org Subject: Re: freebsd encrypted hard disk? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Jan 2009 23:20:57 -0000 --mxv5cy4qt+RJ9ypb Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jan 14, 2009 at 10:55:38PM +0000, RW wrote: > On Wed, 14 Jan 2009 18:59:54 +0100 > Roland Smith wrote: >=20 > > Geli is > > convenient and seems to work well. On modern machines the performance > > penalty is slight. It supports well-regarded encryption algorithms > > like AES and Blowfish. >=20 > It depends on what you mean by modern, and slight, on my single-core > amd64 2.8G the performance penalty of geli is substantial. True for a single-core machine. > Not just in reduced transfer rates, but also in terms of CPU cycles > used - a sustained geli to geli file copy makes things really slow for > me. That's probably because two geli kernel threads are competing for time on a single core. I've had problems with that as well (geli-encrypted USB drive stalling). Since I've switched to a multi-core machine (where the number of cores should be at least equal to the number of geli-encrypted devices), CPU load for gele has dropped to barely noticable. Looking at the machines on sale at local computer stores only the absolute rock-bottom spec-ed machines are single core these days. Roland --=20 R.F.Smith http://www.xs4all.nl/~rsmith/ [plain text _non-HTML_ PGP/GnuPG encrypted/signed email much appreciated] pgp: 1A2B 477F 9970 BA3C 2914 B7CE 1277 EFB0 C321 A725 (KeyID: C321A725) --mxv5cy4qt+RJ9ypb Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) iEYEARECAAYFAkluc1YACgkQEnfvsMMhpyVkAACeLY47vlxH2uA/XcxMHb8Q3jCB C4UAn0MSlkEVS+TmehaBSunmCtPHjyLi =nSyb -----END PGP SIGNATURE----- --mxv5cy4qt+RJ9ypb--