From owner-freebsd-questions@FreeBSD.ORG  Sun Mar 25 20:37:47 2012
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
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 49343106566C
	for <freebsd-questions@freebsd.org>;
	Sun, 25 Mar 2012 20:37:47 +0000 (UTC)
	(envelope-from dan@dan.emsphone.com)
Received: from email2.allantgroup.com (email2.emsphone.com [199.67.51.116])
	by mx1.freebsd.org (Postfix) with ESMTP id 0C7C98FC08
	for <freebsd-questions@freebsd.org>;
	Sun, 25 Mar 2012 20:37:46 +0000 (UTC)
Received: from dan.emsphone.com (dan.emsphone.com [199.67.51.101])
	by email2.allantgroup.com (8.14.4/8.14.4) with ESMTP id q2PKbjjA019003
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO);
	Sun, 25 Mar 2012 15:37:45 -0500 (CDT)
	(envelope-from dan@dan.emsphone.com)
Received: from dan.emsphone.com (smmsp@localhost [127.0.0.1])
	by dan.emsphone.com (8.14.5/8.14.5) with ESMTP id q2PKbjQV084524
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO);
	Sun, 25 Mar 2012 15:37:45 -0500 (CDT)
	(envelope-from dan@dan.emsphone.com)
Received: (from dan@localhost)
	by dan.emsphone.com (8.14.5/8.14.5/Submit) id q2PKbihS084523;
	Sun, 25 Mar 2012 15:37:44 -0500 (CDT) (envelope-from dan)
Date: Sun, 25 Mar 2012 15:37:44 -0500
From: Dan Nelson <dnelson@allantgroup.com>
To: Moritz Schlarb <mail@moritz-schlarb.de>
Message-ID: <20120325203744.GB55964@dan.emsphone.com>
References: <jknp5q$m29$1@dough.gmane.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <jknp5q$m29$1@dough.gmane.org>
X-OS: FreeBSD 8.2-STABLE
User-Agent: Mutt/1.5.21 (2010-09-15)
X-Virus-Scanned: clamav-milter 0.97.2 at email2.allantgroup.com
X-Virus-Status: Clean
X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.6
	(email2.allantgroup.com [199.67.51.78]);
	Sun, 25 Mar 2012 15:37:45 -0500 (CDT)
X-Scanned-By: MIMEDefang 2.68 on 199.67.51.78
Cc: freebsd-questions@freebsd.org
Subject: Re: Performance of Geli compared to Luks
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 25 Mar 2012 20:37:47 -0000

In the last episode (Mar 25), Moritz Schlarb said:
> My HP Proliant Microserver, which I want to use as a NAS, is using an AMD
> Turion II Neo N40L processor.  The plain disks give me about 100 MB/s
> using filebench with the fivestreamwrite/multistreamwrite workloads (as
> software RAID-1 under Linux and zpool mirror under FreeBSD).
> 
> In Linux, using LUKS with cipher aes-xts-plain64 on a software RAID-1 I
> get the same ~100 MB/s for the same benchmarks.
> 
> In FreeBSD, using a mirror zfs pool with underlying GELI with AES-XTS I
> get only ~50 MB/s.
> 
> As the encryption algorithms should be the same, I'm wondering why FreeBSD
> is that slow for nearly exactly the same use case.  Any ideas how I could
> tweak my settings in FreeBSD?

As a first step, I'd try reading/writing from the raw GELI and LUKS devices
to rule out performance differences due to the filesystems you're using.

-- 
	Dan Nelson
	dnelson@allantgroup.com