I’ve done some testing and it turns out that my NFS-Server seems to be the 
limiting factor in combination with the used NFS version. The Server is a 
Windows Server 2012 R2 with “Service for Network File System” installed. I 
mounted the share from ovrit with the default nfs version 3 and it work but not 
more than 100Mbit/s and I don’t know why. When mounting the share on the host 
manually like so “mount –t nfs4 –o minorversion=1 /mnt/test/” 
I was able to get to about 400Mbit/s. It’s still far away from full speed  but 
that’s ok for me. I tried to change the NFS version in ovirt to V4, but with 
these settings the mount fails. It has to be NFS4.1 – can that be done over the 
GUI somehow or are there any other options ?

Thank you,


Von: Vinzenz Feenstra [mailto:vfeen...@redhat.com]
Gesendet: Mittwoch, 22. Juni 2016 12:40
An: Christophe TREFOIS <christophe.tref...@uni.lu>
Cc: Sven Achtelik <sven.achte...@mailpool.us>; users@ovirt.org
Betreff: Re: [ovirt-users] Slow Export Domain

On Jun 22, 2016, at 12:31 PM, Christophe TREFOIS 
<christophe.tref...@uni.lu<mailto:christophe.tref...@uni.lu>> wrote:

Not true, we have seen significant slowness because of the way oVirt exports 
the VMs, as well as I/O.

Well all I wanted to say with this is, that there is no artificial limitation 
of the speed. At least not that I know of, if there’s an issue with the speed 
which is caused by a software issue on our side please do report a bug.

Dr Christophe Trefois, Dipl.-Ing.
Technical Specialist / Post-Doc

Campus Belval | House of Biomedicine
6, avenue du Swing
L-4367 Belvaux
T: +352 46 66 44 6124
F: +352 46 66 44 6949

This message is confidential and may contain privileged information.
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On 22 Jun 2016, at 10:07, Vinzenz Feenstra 
<vfeen...@redhat.com<mailto:vfeen...@redhat.com>> wrote:

On Jun 22, 2016, at 9:39 AM, Sven Achtelik 
<sven.achte...@mailpool.us<mailto:sven.achte...@mailpool.us>> wrote:

Hi Everyone,

I’m trying to export VMs to an Export Domain for Backup and noticed that all of 
this is running at max 100Mbit/s. Is this some limitation that comes with the 
Export Domain ? I’ve checked all network connections and all of them report at 
least 1000Mbits/s.  Am I missing something ?

So from our side there’s no limitation. So there might be a router, switch or 
anything in between that does not support 1 GBit on your network. You’re really 
just limited here by Storage and/or Network bandwith.

Thank you,

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