[ovirt-users] Slow Export Domain

Wed Jun 22 12:48:29 UTC 2016

It’s not taking V4 it has to be V4.1. I just copied the mount command used by vdsm “mount -t nfs -o soft,nosharecache,timeo=600,retrans=6,nfsvers=4 172.16.6.7:/ovirt-NFS /mnt/test/” that’s not working and added “minorversion=1” to the options and it works. How can I pass that extra option to vdsm through the gui ?

This is from the vdsm.log

Thread-6658229::DEBUG::2016-06-22 06:30:00,185::mount::227::Storage.Misc.excCmd::(_runcmd) /usr/bin/sudo -n /usr/bin/mount -t nfs -o soft,nosharecache,timeo=600,retrans=6,nfsvers=4 172.16.6.7:/ovirt-NFS /rhev/data-center/mnt/172.16.6.7:_ovirt-NFS (cwd None)
Thread-6658229::ERROR::2016-06-22 06:30:00,205::storageServer::213::Storage.StorageServer.MountConnection::(connect) Mount failed: (32, ';mount.nfs: Protocol not supported\n')
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/storageServer.py", line 211, in connect
    self._mount.mount(self.options, self._vfsType)
  File "/usr/share/vdsm/storage/mount.py", line 223, in mount
    return self._runcmd(cmd, timeout)
  File "/usr/share/vdsm/storage/mount.py", line 239, in _runcmd
    raise MountError(rc, ";".join((out, err)))
MountError: (32, ';mount.nfs: Protocol not supported\n')
Thread-6658229::ERROR::2016-06-22 06:30:00,206::hsm::2449::Storage.HSM::(connectStorageServer) Could not connect to storageServer
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/hsm.py", line 2446, in connectStorageServer
    conObj.connect()
  File "/usr/share/vdsm/storage/storageServer.py", line 330, in connect
    return self._mountCon.connect()
  File "/usr/share/vdsm/storage/storageServer.py", line 219, in connect
    raise e
MountError: (32, ';mount.nfs: Protocol not supported\n')

Von: Yaniv Kaul [mailto:ykaul at redhat.com]
Gesendet: Mittwoch, 22. Juni 2016 14:32
An: Sven Achtelik <Sven.Achtelik at mailpool.us>
Cc: Vinzenz Feenstra <vfeenstr at redhat.com>; Christophe TREFOIS <christophe.trefois at uni.lu>; users at ovirt.org
Betreff: Re: [ovirt-users] Slow Export Domain

You can change the mount options of the storage domain to v4.
Y.

On Wed, Jun 22, 2016 at 3:26 PM, Sven Achtelik <Sven.Achtelik at mailpool.us<mailto:Sven.Achtelik at mailpool.us>> wrote:
Hi,

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=1 172.16.6.7:/test /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,

Sven

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

On Jun 22, 2016, at 12:31 PM, Christophe TREFOIS <christophe.trefois at uni.lu<mailto:christophe.trefois at 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.

Best,
Dr Christophe Trefois, Dipl.-Ing.
Technical Specialist / Post-Doc
UNIVERSITÉ DU LUXEMBOURG

LUXEMBOURG CENTRE FOR SYSTEMS BIOMEDICINE
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On 22 Jun 2016, at 10:07, Vinzenz Feenstra <vfeenstr at redhat.com<mailto:vfeenstr at redhat.com>> wrote:

On Jun 22, 2016, at 9:39 AM, Sven Achtelik <Sven.Achtelik at mailpool.us<mailto:Sven.Achtelik at 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,

Sven
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