6:57 a.m.
Hello
the oVirt hosts in my cluster have all 10GbE interfaces (bonded 2 by 2),
and I was wondering if a single Linux VM with a virtio interface can reach
for example 8Gbps.
I'm asking because I'm seeing a 100% network usage in some VMs in ovirt VM
dashboard but the real traffic in that VM is between 1-2Gbps.
Thanks
--
Davide Ferrari
Senior Systems Engineer
7:11 a.m.
On Tue, Mar 14, 2017 at 12:57 PM Davide Ferrari <davide(a)billymob.com> wrote:
Hello
the oVirt hosts in my cluster have all 10GbE interfaces (bonded 2 by 2),
and I was wondering if a single Linux VM with a virtio interface can reach
for example 8Gbps.
Are you able from the host, first of all?
I'm asking because I'm seeing a 100% network usage in some VMs in ovirt VM
dashboard but the real traffic in that VM is between 1-2Gbps.
You might be able to, but it's not easy. You'll need to use NUMA and set
correctly the vCPUs pinning, perform correct tuning (multiple queues) and
so on. With SR-IOV I assume there's a better chance (lower latency), btw.
Traffic shown in the dashboard is averaged, is it a sustained 8Gbps or
bursty?
Y.
Thanks
--
Davide Ferrari
Senior Systems Engineer
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8:54 a.m.
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Isn't the traffic shown on the dashboard based in 1Gbps always, even if
the hosts have 10Gb interfaces ?
Is there anywhere in oVirt config files or Database that you can tell to
the dashboard to consider 10Gb instead of 1Gb for those cases ?
Thanks
Fernando
On 14/03/2017 07:57, Davide Ferrari wrote:
Hello
the oVirt hosts in my cluster have all 10GbE interfaces (bonded 2 by
2), and I was wondering if a single Linux VM with a virtio interface
can reach for example 8Gbps.
I'm asking because I'm seeing a 100% network usage in some VMs in
ovirt VM dashboard but the real traffic in that VM is between 1-2Gbps.
Thanks
--
Davide Ferrari
Senior Systems Engineer
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
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<p>Isn't the traffic shown on the dashboard based in 1Gbps always,
even if the hosts have 10Gb interfaces ?</p>
<p>Is there anywhere in oVirt config files or Database that you can
tell to the dashboard to consider 10Gb instead of 1Gb for those
cases ?</p>
<p>Thanks</p>
<p>Fernando<br>
</p>
<br>
<div class="moz-cite-prefix">On 14/03/2017 07:57, Davide Ferrari
wrote:<br>
</div>
<blockquote
cite="mid:CAPU8Gx46wUt5N2D5ZLfzESdvT=o-tiJmDgiGKhjknS4cByi6Cw@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>
<div>
<div>Hello<br>
<br>
</div>
the oVirt hosts in my cluster have all 10GbE interfaces
(bonded 2 by 2), and I was wondering if a single Linux VM
with a virtio interface can reach for example 8Gbps.<br>
<br>
</div>
I'm asking because I'm seeing a 100% network usage in some VMs
in ovirt VM dashboard but the real traffic in that VM is
between 1-2Gbps.<br>
<br>
</div>
Thanks<br clear="all">
<div>
<div>
<div>
<div><br>
-- <br>
<div class="gmail_signature"
data-smartmail="gmail_signature">
<div dir="ltr">
<div>Davide Ferrari<br>
</div>
Senior Systems Engineer<br>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
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<pre wrap="">_______________________________________________
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href="mailto:Users@ovirt.org">Users@ovirt.org</a>
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href="http://lists.ovirt.org/mailman/listinfo/users">http://...
</pre>
</blockquote>
<br>
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On Mar 14, 2017, at 7:54 AM, FERNANDO FREDIANI =
<fernando.frediani(a)upx.com> wrote:
=20
Isn't the traffic shown on the dashboard based in 1Gbps always, even =
if the
hosts have 10Gb interfaces ?
=20
Yep, all dirt interfaces show as 1Gb.
Is there anywhere in oVirt config files or Database that you can tell
=
to the dashboard to consider 10Gb instead of 1Gb for those cases ?
=20
=20
Not that I know of, but it doesn=E2=80=99t affect that available =
performance, it=E2=80=99s just visible.
I=E2=80=99ve gotten ~3.5Gbps out of iperf with no appreciable tuning to =
a VM, so it=E2=80=99s definitely possible to get more speed out of them.
--Apple-Mail=_0F640581-F8FC-4398-9847-C0B811885A56
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charset=utf-8
<html><head><meta http-equiv=3D"Content-Type"
content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><br class=3D""><div><blockquote
type=3D"cite" class=3D""><div =
class=3D"">On Mar 14, 2017, at 7:54 AM, FERNANDO FREDIANI <<a =
href=3D"mailto:fernando.frediani@upx.com" =
class=3D"">fernando.frediani(a)upx.com</a>&gt;
wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D"">
=20
<meta content=3D"text/html; charset=3Dwindows-1252" =
http-equiv=3D"Content-Type" class=3D"">
=20
<div bgcolor=3D"#FFFFFF" text=3D"#000000"
class=3D""><p class=3D"">Isn't=
the traffic shown on the dashboard based in 1Gbps always,
even if the hosts have 10Gb interfaces =
?</p></div></div></blockquote><div><br
class=3D""></div><div>Yep, all =
dirt interfaces show as 1Gb.</div><br class=3D""><blockquote
type=3D"cite"=
class=3D""><div class=3D""><div
bgcolor=3D"#FFFFFF" text=3D"#000000" =
class=3D""><p class=3D"">Is there anywhere in oVirt config
files or =
Database that you can
tell to the dashboard to consider 10Gb instead of 1Gb for those
cases ?</p><div class=3D""><br =
class=3D""></div></div></div></blockquote><br
class=3D""></div><div>Not =
that I know of, but it doesn=E2=80=99t affect that available =
performance, it=E2=80=99s just visible.</div><div><br =
class=3D""></div><div>I=E2=80=99ve gotten ~3.5Gbps out of iperf
with no =
appreciable tuning to a VM, so it=E2=80=99s definitely possible to get =
more speed out of them.</div><br
class=3D""></body></html>=
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2661
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3 comments
4 participants
participants (4)
-
Darrell Budic -
Davide Ferrari -
FERNANDO FREDIANI -
Yaniv Kaul