Date: Sat, 30 Aug 2014 00:13:26 +0000 From: Marko Lerota <mlerota@pdsvelebit.hr> To: Roger Pau =?utf-8?Q?Monn=C3=A9?= <roger.pau@citrix.com> Cc: FreeBSD XEN <freebsd-xen@freebsd.org> Subject: Re: Poor disk IO on Xenserver 6.2 Message-ID: <86tx4un8bd.fsf@cosmos.claresco.hr> 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 %2B0200") References: <86lhq7odub.fsf@arch.perpetuum.hr> <5400B39E.3090904@citrix.com>
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Roger Pau Monn=C3=A9 <roger.pau@citrix.com> 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
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