From owner-freebsd-xen@FreeBSD.ORG Fri Aug 29 22:11:21 2014 Return-Path: Delivered-To: freebsd-xen@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 B7F196CB for ; Fri, 29 Aug 2014 22:11:21 +0000 (UTC) Received: from mail.claresco.hr (zid.claresco.hr [89.201.163.42]) by mx1.freebsd.org (Postfix) with ESMTP id 6A0281FCF for ; Fri, 29 Aug 2014 22:11:20 +0000 (UTC) Received: from mail.claresco.hr (localhost [127.0.0.1]) by mail.claresco.hr (Postfix) with ESMTP id E86E92ADFBE; Sat, 30 Aug 2014 00:11:17 +0200 (CEST) Received: from cosmos.claresco.hr.claresco.hr (unknown [192.168.1.3]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.claresco.hr (Postfix) with ESMTPSA id A59CA2ADFBD; Sat, 30 Aug 2014 00:11:17 +0200 (CEST) From: Marko Lerota To: Roger Pau =?utf-8?Q?Monn=C3=A9?= Subject: Re: Poor disk IO on Xenserver 6.2 In-Reply-To: <5400B39E.3090904@citrix.com> ("Roger Pau \=\?utf-8\?Q\?Monn\?\= \=\?utf-8\?Q\?\=C3\=A9\=22's\?\= message of "Fri, 29 Aug 2014 19:08:46 +0200") Organization: *BSD Users - Fanatics Dept. References: <86lhq7odub.fsf@arch.perpetuum.hr> <5400B39E.3090904@citrix.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwBAMAAAClLOS0AAAAJFBMVEWgnbRLVpRNVY9jMRPh s21jSlEyNVX45Mv4zI+sbUclFAtMVpT8V0lFAAACZ0lEQVR4nG3Tv2vbQBQHcFMogWyeNeVK BLXGl5j6xnABOaNTuXFGmWpwtw519yj4soW6AatT4GKD3+aDZrl/rt/Tr9qlGiz7Pn7v3bsf HVc/NrIiSfElqH53GgijcCqzk/+AmBF5cN0DsFlIRGMh/oHuqxkTM6VlzB4EoZEs2aSZOASb EQJYZpweQshE697GTDndBXtgp9LIT9+OpDGHEfb9knk+nx+jfN1JCVZMCl6XwFm0a2EXztZD 3s4fj47ZbKI2VeBmJImeEfGLJ+M9sDPilX7IB5rN6sdfcGhuoHU+LC4nxfnI7YOJtdb95Gb+ fbgJ2uJ2ZgaA++f5ZzBqNCCYfMTd5q0BfBVNqm7I8gUjQ+YtXotRW6PH9AEj+dKs/KuNQAl5 o/NY+QkonW8aQAl0oXMYPvRiXIM4pRJifbXytnhTA8alBx/jefG2ar3DBlt34/PXz9M+nMVN iNaPUdCApJc2ItejOmLGoK1qQLV9pJmXBnL10DYoBA5aHNfj8ZNwZa5O4CzgTJeilKJmrQJs IHIt1/7/Sg2p3iq/Hz0/5W05rq4M9aN2B5FLohUP4ylVyfxhEIjAs8J4PhIJ9U+CEroogib5 BXAf7bB4vkfAzgPFt1tM9sJZAOH+lCexhwswuNtim4QTZdokqo4o89LkH7V6iFxICeqfp+Wh fmUuGPunLj2Meti6Cn4DjJ/UReROqR+aqawAi/JkfgKE64rrfkhjU8MtT8ivR4S5n6Yo08A7 HvgAlHDWRSGlNSDxwK9HtXy4FS2I60EdUIJM+Ut9OZNJG4CpbEQW1VBQoQoPuBw2EVa4P0u0 TgzQF+VoAAAAAElFTkSuQmCC Date: Sat, 30 Aug 2014 00:13:26 +0000 Message-ID: <86tx4un8bd.fsf@cosmos.claresco.hr> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Virus-Scanned: ClamAV using ClamSMTP Cc: FreeBSD XEN X-BeenThere: freebsd-xen@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Discussion of the freebsd port to xen - implementation and usage List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 29 Aug 2014 22:11:21 -0000 Roger Pau Monn=C3=A9 writes: > El 29/08/14 a les 11.16, Marko Lerota ha escrit: >> I have installed FreeBSD 10 release, stable and current on=20 >> Xenserver 6.2 with latest patches. All of them have poor disk=20 >> write speed. Performance from 12MBps - 25MBps. I tried it on >> other servers but the performance is the same. Latest Debian >> stable on the same machine have 300MBps disk speed. Am I missing >> something after installation or this is the default speed? >>=20 > > I've certainly seen higher speeds, around 25-35MB/s on my box, which is > the same speed I can get with a Linux guest. Could you describe how you > are running your tests? You copy some *.tar.gz or *.iso file that have 600 MB. If it finish=20 in 2-3 seconds than it's fine. If it runs 40 seconds than it's very,=20 very bad. You can see current disk speed with 'iostat 1'. Today I have=20 installed FreeBSD 10-Release on KVM and it runs smooth. Files are copied at 150-300MB per second. That's how it should be. Suppose that=20 you need to copy or sync files with another disk/partition very often.=20 It would be very painful and long process. There is definitely something=20 wrong here.=20 --=20 Marko Lerota Sent from my GNU Emacs/Gnus Mailer