[ovirt-users] Re: Importing KVMs and QCOW

[Angus Clarke]

> The odd thing when I do that is that on boot the VM says no boot device or 
> the like

Did you set the boot disk flag in oVirt?
Compute -> VMs -> "Highlight VM" -> Disks -> "Highlight boot disk" -> Edit -> 
"Bootable" tick box

Otherwise you should also check the disk type in oVirt is the same as the 
previous VM disk type - in my example vmdks imported from VMWare were "SCSI" 
disks to the VM, setting them to "VirtIO-SCSI" in oVirt 4.3 worked well.

Regards
Angus


From: Abe E 
Sent: 07 March 2022 07:42
To: users@ovirt.org 
Subject: [ovirt-users] Re: Importing KVMs and QCOW

The odd thing when I do that is that on boot the VM says no boot device or the 
like
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[ovirt-users] Re: Importing KVMs and QCOW

[Abe E]

The odd thing when I do that is that on boot the VM says no boot device or the 
like
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[ovirt-users] Re: NFS Synology NAS (DSM 7)

[Simon Kong]

> Thanks for the replies, as it turns out it was nothing to do with
> /etc/exports or regular file system permissions.
> 
> Synology have applied their own brand of Access Control Lists (ACLs) to
> shared folders.
> 
> Basically I had to run the following commands to allow vdsm:kvm (36:36) to
> read and write to the share:
> 
> EXPORT_DIR=/volumeX/...
> 
> synoacltool -set-owner "$EXPORT_DIR" group kvm:allow:rwxpdDaARWcCo:fd--
> synoacltool -add "$EXPORT_DIR" user:vdsm:allow:rwxpdDaARWcCo:fd--
> synoacltool -add "$EXPORT_DIR" group:kvm:allow:rwxpdDaARWcCo:fd--
> 
> On Wed, 1 Sept 2021 at 04:28, Strahil Nikolov  wrote:

I have a synology with DSM 7.0-41890 too. had the same problem, and that fixed 
it for me too!!! Thanks!
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[ovirt-users] oVirt reboot fails

[dean--- via Users]

Rebooting oVirt fails on a RAID array installed on a Cisco UCS C220 M5.  It 
fails using either legacy BIOS or UEFI with the error…

error: ../../grub-core/fs/fshelp.c:258:file 
`//ovirt-node-ng-4.4.10.1-0.20220202.0+1/vmlinuz-4.18.0-358.el8.x86_64’ not 
found.
Error: ../../grub-core/loader/i386/efi/linux.c:94:you need to load the kernel 
first.

Press any key to continue…

Failed to boot both default and fallback entries.

Press any key to continue…


Any attempts to recover using the installation/rescue ISO also fails and locks 
up.


All Googled solutions I've tried so far have not worked.

Does anyone know how to prevent this from happening and the correct method to 
recover when it does?

Thanks!

... Dean
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[ovirt-users] Re: Import an snapshot of an iSCSI Domain

[Vinícius Ferrão via Users]

Hi Nir and Strahil.

On 6 Mar 2022, at 19:09, Nir Soffer 
mailto:nsof...@redhat.com>> wrote:

On Fri, Mar 4, 2022 at 8:28 AM Vinícius Ferrão via Users
mailto:users@ovirt.org>> wrote:

Hi again, I don’t know if it will be possible to import the storage domain due 
to conflicts with the UUID of the LVM devices. I’ve tried to issue a 
vgimportclone to chance the UUIDs and import the volume but it still does not 
shows up on oVirt.

LVM can change VG/PV UUIDs and names, but storage domain metadata kept in the
VG tags and volume metadata area contain the old VG and PV names and UUIDs,
so it is unlikely to work.

The system is designed so if the original PVs are bad, you can
disconnect them and
connect a backup of the PVs, and import the storage domain again to the system.

Can you explain in more details what you are trying to do?

Nir

What I was trying to accomplish is get some VM snapshots from days ago.

On my storage system it generates a snapshot of the entire disk pool in a daly 
basis. So it was natural, at least for me, to mount a snapshot at a given time 
to export some VMs from those snapshots. The environment had an attack and 
needed to be recovered from it, and rolling back was the approach.

But that what the issue happened, when trying to import the snapshot from the 
iSCSI share it conflicted with the running iSCSI share, since it’s a storage 
snapshot, it have the exactly same metadata.

I think the issue here is a missing feature on oVirt to remap the metadata and 
permit the mount in this situation, right?

What I ended up doing:
* Removed one of the servers from oVirt Cluster / Datacenter
* Reinstalled from the ground
* Fired up a new hosted engine on a new iSCSI HE dedicated share
* Reconfigured everything: network, VLAN, iSCSI, etc.
* == IMPORTED the snapshot on this new engine
* Created an export domain on another NFS share
* Exported the 6 VM’s that I need to export from the storage-level snapshot to 
the export domain
* Detached the export domain from the temporary engine
* Added the export domain on the production engine
* Deleted the compromised VMs
* Imported the “snapshoted" VM’s from the export domain
* == INFRA is back
* Destroyed the new engine, the snapshot iSCSI share and the export domain
* Reinstalled the host
* Added back to the original Datacenter / Cluster.

As you can see was a tiresome work just to get the VM’s back from an storage 
level snapshot of the iSCSI share, but is what I’ve ended up doing.

Lesson learned: it’s too difficult to recover storage-level snapshots, it’s 
hard on NFS and on iSCSI is extremely worse since you can’t mount iSCSI 
whatever you want to.

My opinion: Should be a feature on oVirt to at least allow to mount this kind 
of conflicting volume as readonly for recovery reasons only.

Thanks.


I don’t know how to mount the iSCSI volume to recover the data. The data is 
there but it’s extremely difficult to get it.

Any ideias?

Thanks.


On 3 Mar 2022, at 20:56, Vinícius Ferrão 
mailto:fer...@versatushpc.com.br>> wrote:

I think I’ve found the root cause, and it’s the LVM inside the iSCSI volume:

[root@rhvh5 ~]# pvscan
WARNING: Not using device /dev/mapper/36589cfc00db9cf56949c63d338ef for PV 
fTIrnd-gnz2-dI8i-DesK-vIqs-E1BK-mvxtha.
WARNING: PV fTIrnd-gnz2-dI8i-DesK-vIqs-E1BK-mvxtha prefers device 
/dev/mapper/36589cfc006f6c96763988802912b because device is used by LV.
PV /dev/mapper/36589cfc006f6c96763988802912bVG 
9377d243-2c18-4620-995f-5fc680e7b4f3   lvm2 [<10.00 TiB / 7.83 TiB free]
PV /dev/mapper/36589cfc00a1b985d3908c07e41adVG 
650b0003-7eec-4fa5-85ea-c019f6408248   lvm2 [199.62 GiB / <123.88 GiB free]
PV /dev/mapper/3600605b00805d8a01c2180fd0d8d8dad3   VG rhvh_rhvh5   
  lvm2 [<277.27 GiB / 54.55 GiB free]
Total: 3 [<10.47 TiB] / in use: 3 [<10.47 TiB] / in no VG: 0 [0   ]

The device that’s not being using is the snapshot. There’s a way to change the 
ID of the device so I can import the data domain?

Thanks.

On 3 Mar 2022, at 20:21, Vinícius Ferrão via Users 
mailto:users@ovirt.org>> wrote:

Hello,

I need to import an old snapshot of my Data domain but oVirt does not find the 
snapshot version when importing on the web interface.

To be clear, I’ve mounted a snapshot on my storage, and exported it on iSCSI. I 
was expecting that I could be able to import it on the engine.

On the web interface this Import Pre-Configured Domain finds the relative IQN 
but it does not show up as a target.

Any ideas?


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[ovirt-users] Preparing for next week 4.5.0 Alpha test day

[Sandro Bonazzola]

Hi, 4.5.0 Alpha is coming next week!
As for oVirt 4.4 test day we have a trello board at
https://trello.com/b/3FZ7gdhM/ovirt-450-test-day .
For reference, the 4.4 trello board is at
https://trello.com/b/5ZNJgPC3/ovirt-440-test-day

If you have troubles accessing the trello board please let me know.
If you have a better idea on how to coordinate the next 4.5.0 beta test day
(too late for 4.5.0 alpha) I'm open to suggestions.

A release management draft page has been created at:
https://www.ovirt.org/release/4.5.0/

If you're willing to help testing the release during the test days please
join the oVirt development mailing list at
https://lists.ovirt.org/archives/list/de...@ovirt.org/ and report your
feedback there.
Please join the trello board for sharing what you're going to test so
others can focus on different areas not covered by your test.
If you don't want to register to trello, please share on the oVirt
development mailing list and we'll add it to the board.
The board is publicly visible also to non-registered users.
Instructions for installing oVirt 4.5.0 Alpha and oVirt 4.5.0 Beta for
testing will be added to the release page
https://www.ovirt.org/release/4.5.0/ when the corresponding version will be
released.

Professional Services, Integrators and Backup vendors: please plan a test
session against your additional services, integrated solutions,
downstream rebuilds, backup solution accordingly.
If you're not listed here:
https://ovirt.org/community/user-stories/users-and-providers.html
consider adding your company there.

If you're willing to help updating the localization for oVirt 4.5.0 please
follow https://ovirt.org/develop/localization.html

If you're willing to help promoting the oVirt 4.5.0 release you can submit
your banner proposals for the oVirt home page and for the
social media advertising at https://github.com/oVirt/ovirt-site/issues
As an alternative please consider submitting a case study as in
https://ovirt.org/community/user-stories/user-stories.html

Feature owners: please start planning a presentation of your feature for
oVirt Youtube channel: https://www.youtube.com/c/ovirtproject
If you have some new feature requiring community feedback / testing please
add your case under the "Test looking for volunteer" section.

Do you want to contribute to getting ready for this release?
Read more about oVirt community at https://ovirt.org/community/ and join
the oVirt developers https://ovirt.org/develop/


-- 

Sandro Bonazzola

MANAGER, SOFTWARE ENGINEERING, EMEA R&D RHV

Red Hat EMEA 

sbona...@redhat.com


*Red Hat respects your work life balance. Therefore there is no need to
answer this email out of your office hours.*
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[ovirt-users] Re: VM hanging at sustained high throughput

[David Johnson]

FYI - the application for the cluster is migration of terabyte sized
databases. It is not acceptable for the data to be lost if something is
rebooted.

*David Johnson*



On Mon, Mar 7, 2022 at 11:09 AM David Johnson 
wrote:

> Following up on this old email chain:
>
> *" What happens if you define a tmpfs and then create the qemu disk ontop
> of that ramdisk.*
> *Does qemu hang again ?"*
>
>
> I'm not primarily a linux admin, so I need some assistance here.
>
> 1. Are you creating the tmpfs on the host or on the VM?
>
> 2. What exactly do you mean by "create the qemu disk ontop of that
> ramdisk" ?  Please use large crayons - I know this will be obvious to
> people who live in the linux administration world, but I'm just on the
> fringes of that world and a relative novice. Ideally, I'd like a link to
> step by step instructions for retrofitting an existing installation like
> this.
>
> Thank you!
>
> *David Johnson*
>
>
> On Thu, Sep 23, 2021 at 2:15 PM Strahil Nikolov 
> wrote:
>
>> What happens if you define a tmpfs and then create the qemu disk ontop of
>> that ramdisk.
>> Does qemu hang again ?
>>
>> Best Regards,
>> Strahil Nikolov
>>
>> On Thu, Sep 23, 2021 at 18:25, Shantur Rathore
>>  wrote:
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[ovirt-users] Re: VM hanging at sustained high throughput

[David Johnson]

Following up on this old email chain:

*" What happens if you define a tmpfs and then create the qemu disk ontop
of that ramdisk.*
*Does qemu hang again ?"*


I'm not primarily a linux admin, so I need some assistance here.

1. Are you creating the tmpfs on the host or on the VM?

2. What exactly do you mean by "create the qemu disk ontop of that ramdisk"
?  Please use large crayons - I know this will be obvious to people who
live in the linux administration world, but I'm just on the fringes of that
world and a relative novice. Ideally, I'd like a link to step by step
instructions for retrofitting an existing installation like this.

Thank you!

*David Johnson*


On Thu, Sep 23, 2021 at 2:15 PM Strahil Nikolov 
wrote:

> What happens if you define a tmpfs and then create the qemu disk ontop of
> that ramdisk.
> Does qemu hang again ?
>
> Best Regards,
> Strahil Nikolov
>
> On Thu, Sep 23, 2021 at 18:25, Shantur Rathore
>  wrote:
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>
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[ovirt-users] Re: [External] : Importing KVMs and QCOW

[Abe E]

It seems the images I was given by the company are not working with OVIRT.
OVA Import failed over GUI, the KVM Raw images failed to boot.

I was able to take the ova though and convert it to a qcow image through the 
CLI and upload it to the GUI Disk page and attach it to my VM, that is when it 
actually showed a 150GB HDD with a 3GB actual size and it booted up. Thanks 
again

For people googling : I used this 
https://www.tekbyte.net/how-to-convert-ova-image-to-qcow2-qemu-and-virt-manager/
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[ovirt-users] Re: Best CPU topolgy for VMs (Socket / Core / Threads)

[Strahil Nikolov via Users]

As long as you keep inside the NUMA limits you should be OK.For example:1 core 
, 2 threads is equal to 2 cores, 1 thread eachAfter all, all VMs in KVM are 
just processes.

Yet, if your server has 2 CPUs each with 6 cores ( 2 threads per core ) ,you 
should avoid setting VMs with 13 vCPUs (13 real threads) as you will have to 
use some of the threads on the second CPU.
i think there is a guide for High Performance VMs where NUMA cases are 
described quite well.
Best Regards,Strahil Nikolov
 
 
  On Mon, Mar 7, 2022 at 16:37, Laurent Duparchy wrote:
Thanks for your reply.
 
 So, no performance issue if the virtual topology does not match the physical 
one ?
 
 
 Laurent Duparchy
 ESRF - The European Synchrotron
 MIS Group
 04 76 88 22 56 Strahil Nikolov wrote on 07/03/2022 15:10:
  
I think it's most useful for licensing purposes -> like the Win10 example 
  Best Regards, Strahil Nikolov
 
 
Hi, 
  Given the fact that there is the option to match de CPUs physical topology 
(Socket / Core / Threads) , I guess it can make a difference. 
  When ? 
  Linux vs Windows ?
  
  (One example I know is that Windows 10 won't access more than 4 sockets.)
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[ovirt-users] Re: Give direct internet access to Redhat RHVM/Ovirt Vms from an AWS bare metal host

[Strahil Nikolov via Users]

My VMs are on the ovirt bridge which means that they are on the same network 
segment as the Host.If you are on the same situation, the AWS DHCP should give 
you an IP but I'm not sure about the firewall/network security.
Maybe you can ask AWS for assistance ?
Best Regards,Strahil Nikolov
 
 
  On Mon, Mar 7, 2022 at 12:05, Eugène Ngontang wrote:   
Hi,
I’ve set up a RHVM/Ovirt host on AWS using a bare metal instance.
Everything is working but now I would like to give a direct internet access to 
VMs created inside this host. Actually those VMs get to internet through a ssh 
forwarded squid proxy.
I can’t find the way to set that direct internet access for underlying VMs.
Please can one here advise or give me any good doc link?
Best regards,Eugène NG

-- 
lescdnengont...@lescdn.comAux
 hommes il faut un chef, et au chef il faut des hommes!
L'habit ne fait pas le moine, mais lorsqu'on te voit on te juge!
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[ovirt-users] Re: OVIRT INSTALLATION IN SAS RAID

[Strahil Nikolov via Users]

Try Gianlica's 'lspci' command.
Best Regards,Strahil Nikolov
 
 
here it shows under hardware id..

SCSI\DiskDELLPERC_6/i1.22
SCSI\DiskDELLPERC_6/i
SCSI\DiskDELL
SCSI\DELLPERC_6/i1
DELLPERC_6/i1
GenDisk
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[ovirt-users] Re: Best CPU topolgy for VMs (Socket / Core / Threads)

[Strahil Nikolov via Users]

I think it's most useful for licensing purposes -> like the Win10 example
Best Regards,Strahil Nikolov
 
 
Hi, 
Given the fact that there is the option to match de CPUs physical topology 
(Socket / Core / Threads) , I guess it can make a difference. 
When ? 
Linux vs Windows ?

(One example I know is that Windows 10 won't access more than 4 sockets.)
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[ovirt-users] Re: GlusterFS poor performance

[Strahil Nikolov via Users]

Keep in mind that if you have multiple 1Gbit links, you can utilize them 
all.For example, you can use LACP with layer3+4 for hashing , and because each 
brick uses a different port -> the connectivity will be done on a separate link.
Best Regards,Strahil Nikolov
 
 
  On Mon, Mar 7, 2022 at 10:35, Francesco Lorenzini via Users 
wrote:   ___
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[ovirt-users] Re: OVIRT INSTALLATION IN SAS RAID

[muhammad . riyaz]

here it shows under hardware id..

SCSI\DiskDELLPERC_6/i1.22
SCSI\DiskDELLPERC_6/i
SCSI\DiskDELL
SCSI\DELLPERC_6/i1
DELLPERC_6/i1
GenDisk
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[ovirt-users] Re: [External] : Importing KVMs and QCOW

[Marcos Sungaila]

Hi Abe,

You can upload the disk to the desired store domain and attach it to the guest 
you create. I do it regularly.
I upload the qcow2 image to the storage domain and attach it to the VM using 
the web interface.
Also, you upload the KVM guest disk as a template. 

Regards,
Marcos

-Original Message-
From: Abe E  
Sent: sexta-feira, 4 de março de 2022 15:10
To: users@ovirt.org
Subject: [External] : [ovirt-users] Importing KVMs and QCOW

Hey Everyone

So one thing that hasnt been clear for me is method for importing KVMs and QCOW 
images to ovirt.
I have had some success with importing some VMs in KVM format by building a VM 
of same size and then replacing the image file based on its disk ID.

My issue so far has been with some premade qcow and sometimes KVMs dont 
successfully work with the above method. Is it not possible to simply upload to 
the disk page in the GUI and attach it to the VM, what am I doing wrong here?

Thanks in advance
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[ovirt-users] Give direct internet access to Redhat RHVM/Ovirt Vms from an AWS bare metal host

[Eugène Ngontang]

Hi,

I’ve set up a *RHVM/Ovirt* host on AWS using a bare metal instance.

Everything is working but now I would like to give a direct internet access
to VMs created inside this host. Actually those VMs get to internet through
a ssh forwarded squid proxy.

I can’t find the way to set that direct internet access for underlying VMs.

Please can one here advise or give me any good doc link?

Best regards,
Eugène NG

-- 
LesCDN 
engont...@lescdn.com

*Aux hommes il faut un chef, et au*

* chef il faut des hommes!L'habit ne fait pas le moine, mais lorsqu'on te
voit on te juge!*
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[ovirt-users] Re: Hosted Engine deployment looks stuck in startup during the deployment

[Eugène Ngontang]

Hello Darrell,

Thank you,  and sorry for my late reply.

I found the issue which was that the host ssh server configuration was
preventing connection from the new built hosted engine, and also the nfs
export file system was missing there.

Thanks again for your attention.

Regards,
Eugène NG

Le mar. 1 févr. 2022 à 18:05, Darrell Budic  a
écrit :

> Sounds like  you hit this QEMU 6.1 issue :
> https://bugzilla.redhat.com/show_bug.cgi?id=2024605
>
> Downgrade the hosts qemu to 6.0 and you’ll probably be good, although
> you’ll have to re-run the installation.
>
>   -Darrell
>
> On Feb 1, 2022, at 8:34 AM, Eugène Ngontang  wrote:
>
> Hi,
>
> I'm using an aws ec2 bare metal install to deploy RHV-M in order to create 
> and test NVidia GPU VMs.
>
> I'm trying to deploy a self hosted engine version 4.4.
> I've setup everything till the hosted-engine deployment and Hosted Engine 
> deployment looks like stuck at engine host startup, and times out many more 
> hours after.
>
> I'm suspecting networking startup issue but can really and clearly identify 
> the issue. Because during all this time the deployment process is waiting for 
> the hosted engine to come up before it finishes, the hosted engine itself is 
> up and running, is still running till now, but is not reachable.
>
> Here attached you will find :
> - A screenshot before the timeout
> - A screenshot after the timeout (fail)
> - The answer file I appended to the hosted-engine command
>
>> hosted-engine --deploy --4 --config-append=hosted-engine.conf
>
>
> - The deployment log output
> - The resulting answer file after the deployment.
> I think the problem would
>
> I think the problem would at the network startup step but as I don't have any 
> explicit error/failure message, I can't tell.
> Please can someone here advise?
> Please let me know if you need any more information from me.
>
> Best regards,
> Eugène NG
>
> Best regards,
> Eugène NG
>
> --
> LesCDN 
> engont...@lescdn.com
> 
> *Aux hommes il faut un chef, et au*
>
> * chef il faut des hommes!L'habit ne fait pas le moine, mais lorsqu'on te
> voit on te juge!*
> 
> 
> 
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[ovirt-users] Best CPU topolgy for VMs (Socket / Core / Threads)

[duparchy]

Hi, 
Given the fact that there is the option to match de CPUs physical topology 
(Socket / Core / Threads) , I guess it can make a difference. 
When ? 
Linux vs Windows ?

(One example I know is that Windows 10 won't access more than 4 sockets.)
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[ovirt-users] Re: GlusterFS poor performance

[Francesco Lorenzini via Users]

Hi all,

just for info: the problem wasn't glusterfs or any ovirt related 
configuration, just bandwidth cap and throttling. Doing the maths the 
performance is 'Ok'.


Regards,
Francesco

Il 03/03/2022 12:09, francesco--- via Users ha scritto:

Hi all,

I'm running a glusterFS setup v 8.6 with two node and one arbiter. Both nodes 
and arbiter are CentOS 8 Stream with oVirt 4.4. Under gluster I have a LVM thin 
partition.

VMs running in this cluster have really poor write performance, when a test 
directly performend on the disk score about 300 MB/s

dd test on host1:

[root@ovirt-host1 tmp]# dd if=/dev/zero of=./foo.dat bs=256M count=1 oflag=dsync
1+0 records in
1+0 records out
268435456 bytes (268 MB, 256 MiB) copied, 0.839861 s, 320 MB/s

dd test on host1 on gluster:

[root@ovirt-host1 tmp]# dd if=/dev/zero 
of=/rhev/data-center/mnt/glusterSD/ovirt-host1:_data/foo.dat bs=256M count=1 
oflag=dsync
1+0 records in
1+0 records out
268435456 bytes (268 MB, 256 MiB) copied, 50.6889 s, 5.3 MB/s

Nontheless, the write results in a VM inside the cluster is a little bit faster 
(dd results vary from 15 MB/s to 60 MB/s)  and this is very strange to me:

root@vm1-ha:/tmp# dd if=/dev/zero of=./foo.dat bs=256M count=1 oflag=dsync; rm 
-f ./foo.dat
1+0 records in
1+0 records out
268435456 bytes (268 MB, 256 MiB) copied, 5.58727 s, 48.0 MB/s


Here's the actual gluster configuration, I also applied  some paramaters in 
/var/lib/glusterd/groups/virt as mentioned in other ovirt thread related I 
found.


gluster volume info data

Volume Name: data
Type: Replicate
Volume ID: 09b532eb-57de-4c29-862d-93993c990e32
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x (2 + 1) = 3
Transport-type: tcp
Bricks:
Brick1: ovirt-host1:/gluster_bricks/data/data
Brick2: ovirt-host2:/gluster_bricks/data/data
Brick3: ovirt-arbiter:/gluster_bricks/data/data (arbiter)
Options Reconfigured:
server.event-threads: 4
cluster.shd-wait-qlength: 1
cluster.shd-max-threads: 8
cluster.server-quorum-type: server
cluster.lookup-optimize: off
cluster.locking-scheme: granular
cluster.data-self-heal-algorithm: full
cluster.choose-local: off
client.event-threads: 4
performance.client-io-threads: on
nfs.disable: on
transport.address-family: inet
storage.fips-mode-rchecksum: on
storage.owner-uid: 36
storage.owner-gid: 36
features.shard: on
performance.low-prio-threads: 32
performance.strict-o-direct: on
network.remote-dio: off
network.ping-timeout: 30
user.cifs: off
performance.quick-read: off
performance.read-ahead: off
performance.io-cache: off
cluster.eager-lock: enable


The speed between two hosts is about 1Gb/s:

[root@ovirt-host1 ~]# iperf3 -c ovirt-host2 -p 5002
Connecting to host ovirt-host2 port 5002
[  5] local x.x.x.x port 58072 connected to y.y.y.y port 5002
[ ID] Interval   Transfer Bitrate Retr  Cwnd
[  5]   0.00-1.00   sec   112 MBytes   938 Mbits/sec  117375 KBytes
[  5]   1.00-2.00   sec   112 MBytes   937 Mbits/sec0397 KBytes
[  5]   2.00-3.00   sec   110 MBytes   924 Mbits/sec   18344 KBytes
[  5]   3.00-4.00   sec   112 MBytes   936 Mbits/sec0369 KBytes
[  5]   4.00-5.00   sec   111 MBytes   927 Mbits/sec   12386 KBytes
[  5]   5.00-6.00   sec   112 MBytes   938 Mbits/sec0471 KBytes
[  5]   6.00-7.00   sec   108 MBytes   909 Mbits/sec   34382 KBytes
[  5]   7.00-8.00   sec   112 MBytes   942 Mbits/sec0438 KBytes
[  5]   8.00-9.00   sec   111 MBytes   928 Mbits/sec   38372 KBytes
[  5]   9.00-10.00  sec   111 MBytes   934 Mbits/sec0481 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bitrate Retr
[  5]   0.00-10.00  sec  1.08 GBytes   931 Mbits/sec  219 sender
[  5]   0.00-10.04  sec  1.08 GBytes   926 Mbits/sec  receiver

iperf Done.

Between nodes and arbiter about 200MB/s

[  5] local ovirt-arbiter port 45220 connected to ovirt-host1 port 5002
[ ID] Interval   Transfer Bitrate Retr  Cwnd
[  5]   0.00-1.00   sec  30.6 MBytes   257 Mbits/sec  1177281 KBytes
[  5]   1.00-2.00   sec  26.2 MBytes   220 Mbits/sec0344 KBytes
[  5]   2.00-3.00   sec  28.8 MBytes   241 Mbits/sec   15288 KBytes
[  5]   3.00-4.00   sec  26.2 MBytes   220 Mbits/sec0352 KBytes
[  5]   4.00-5.00   sec  30.0 MBytes   252 Mbits/sec   32293 KBytes
[  5]   5.00-6.00   sec  26.2 MBytes   220 Mbits/sec0354 KBytes
[  5]   6.00-7.00   sec  30.0 MBytes   252 Mbits/sec   32293 KBytes
[  5]   7.00-8.00   sec  27.5 MBytes   231 Mbits/sec0355 KBytes
[  5]   8.00-9.00   sec  28.8 MBytes   241 Mbits/sec   30294 KBytes
[  5]   9.00-10.00  sec  26.2 MBytes   220 Mbits/sec3250 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval   Transfer Bitrate Retr
[  5]   0.00-10.00  sec   281 MBytes   235 Mbits/sec  1289 sender
[  5]   0.00-10.03  sec   277 MBytes   232 Mbits/sec  r