Open Stack

Try this Cisco white paper. *10Ge Connectivity with Windows Servers*

http://www.cisco.com/c/dam/en/us/products/collateral/switches/nexus-7000-series-switches/C07-572828-00_10Gb_Conn_Win_DG.pdf

See page 14.


*Adam Lawson*
AQORN, Inc.
427 North Tatnall Street
Ste. 58461
Wilmington, Delaware 19801-2230
Toll-free: (844) 4-AQORN-NOW
Direct: +1 (302) 268-6914



On Fri, May 9, 2014 at 11:09 AM, JR <botemout at gmail.com> wrote:

> Darn. That dropped the performance by ~50% ...
>
>
> On 5/9/2014 1:57 PM, Adam Lawson wrote:
> > I just heard back. Within Windows, disable Large File Offload.
> >
> > Let me know how that goes?
> >
> > Mahalo,
> > Adam
> >
> >
> > *Adam Lawson*
> > AQORN, Inc.
> > 427 North Tatnall Street
> > Ste. 58461
> > Wilmington, Delaware 19801-2230
> > Toll-free: (844) 4-AQORN-NOW
> > Direct: +1 (302) 268-6914
> >
> >
> >
> > On Fri, May 9, 2014 at 10:54 AM, JR <botemout at gmail.com> wrote:
> >
> >> Adam,
> >>
> >> If I'm looking in the right place (the redhat virtio ethernet adapter
> >> properties), there is nowhere to specify forcing the speed or duplex.
> >> The only value I see is Init.ConnectionRate (which is 10G). I've been
> >> able to see performance in excess of 2Gb/sec (when running an iperf
> >> against the ubuntu host on which the VM runs) so it doesn't think it's a
> >> 1G NIC; the performance is just very poor. The same iperf from a centos
> >> VM to its host gives > 9Gb/sec.
> >>
> >> Thanks
> >> JR
> >>
> >> On 5/9/2014 1:19 PM, Adam Lawson wrote:
> >>> Is the duplex setting and speed set on each side to force 10ge (since
> >>> auto-neg seems to not work in this scenario)? Still waiting to hear
> back
> >> on
> >>> steps taken in the situation I described earlier.
> >>>
> >>> Mahalo,
> >>> Adam
> >>>
> >>>
> >>> *Adam Lawson*
> >>> AQORN, Inc.
> >>> 427 North Tatnall Street
> >>> Ste. 58461
> >>> Wilmington, Delaware 19801-2230
> >>> Toll-free: (844) 4-AQORN-NOW
> >>> Direct: +1 (302) 268-6914
> >>>
> >>>
> >>>
> >>> On Fri, May 9, 2014 at 9:25 AM, JR <botemout at gmail.com> wrote:
> >>>
> >>>> I'd be very appreciative to hear how you solved this Adam.  ;-)
> >>>>
> >>>> On 5/9/2014 12:29 AM, Adam Lawson wrote:
> >>>>> Look at the TCP stack within Windows and optimizations recommended by
> >>>>> Microsoft. I don't think it's a KVM or openstack question to be
> honest.
> >>>> We
> >>>>> ran into similar issues on plain old Win2008 R2 servers that were
> >> running
> >>>>> on bare metal. Will update again when I ping someone to find out what
> >>>>> specifically it was back then.
> >>>>>
> >>>>>
> >>>>> *Adam Lawson*
> >>>>> AQORN, Inc.
> >>>>> 427 North Tatnall Street
> >>>>> Ste. 58461
> >>>>> Wilmington, Delaware 19801-2230
> >>>>> Toll-free: (844) 4-AQORN-NOW
> >>>>> Direct: +1 (302) 268-6914
> >>>>>
> >>>>>
> >>>>>
> >>>>> On Thu, May 8, 2014 at 6:59 PM, JR <botemout at gmail.com> wrote:
> >>>>>
> >>>>>> Greetings,
> >>>>>>
> >>>>>> My openstack grizzly cluster runs on ubuntu 12.04 servers with 10G
> >> NICs.
> >>>>>> I have ubuntu, centos and windows 2008 R2 guests.  I've noticed that
> >>>>>> while both my linux guests can communicate at some reasonable
> >>>>>> approximation of 10G wire speed (e.g., 7-9Gb/sec on iperf tests),
> the
> >>>>>> windows guests max out at 2.5G when talking to the host on which
> they
> >>>>>> run, down to ~1.2G to other hosts.
> >>>>>>
> >>>>>> I've made some modifications as per this doc:
> >>>>>>
> >>>>>> http://www.linux-kvm.org/page/WindowsGuestDrivers/kvmnet/registry
> >>>>>>
> >>>>>> and upgraded my virtio network driver, but it's not helped.  I've
> also
> >>>>>> done about an hour or two of googling which has revealed little.
> >>>>>>
> >>>>>> I understand that this is not an openstack issue, but, I suspect,
> >> others
> >>>>>> have encountered this when bringing 2008 R2 guests into their
> >> clusters.
> >>>>>> Anyone?
> >>>>>>
> >>>>>> Thanks much,
> >>>>>> JR
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> _______________________________________________
> >>>>>> Mailing list:
> >>>>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> >>>>>> Post to     : openstack at lists.openstack.org
> >>>>>> Unsubscribe :
> >>>>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> >>>>>>
> >>>>>
> >>>>
> >>>> --
> >>>> Your electronic communications are being monitored; strong encryption
> is
> >>>> an answer. My public key
> >>>> <http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4F08C504BD634953
> >
> >>>>
> >>>
> >>
> >> --
> >> Your electronic communications are being monitored; strong encryption is
> >> an answer. My public key
> >> <http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4F08C504BD634953>
> >>
> >
>
> --
> Your electronic communications are being monitored; strong encryption is
> an answer. My public key
> <http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4F08C504BD634953>
>
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