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
On Tue, Mar 14, 2017 at 12:57 PM Davide Ferrari <davide@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 _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
This is a multi-part message in MIME format. --------------81264F86B531C843C6978770 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit 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@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
--------------81264F86B531C843C6978770 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 7bit <html> <head> <meta content="text/html; charset=windows-1252" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> <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> <fieldset class="mimeAttachmentHeader"></fieldset> <br> <pre wrap="">_______________________________________________ Users mailing list <a class="moz-txt-link-abbreviated" href="mailto:Users@ovirt.org">Users@ovirt.org</a> <a class="moz-txt-link-freetext" href="http://lists.ovirt.org/mailman/listinfo/users">http://lists.ovirt.org/mailman/listinfo/users</a> </pre> </blockquote> <br> </body> </html> --------------81264F86B531C843C6978770--
--Apple-Mail=_0F640581-F8FC-4398-9847-C0B811885A56 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8
On Mar 14, 2017, at 7:54 AM, FERNANDO FREDIANI = <fernando.frediani@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 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; 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@upx.com</a>> 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>= --Apple-Mail=_0F640581-F8FC-4398-9847-C0B811885A56--
participants (4)
-
Darrell Budic -
Davide Ferrari -
FERNANDO FREDIANI -
Yaniv Kaul