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 <[email protected]> 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 : [email protected] >> Unsubscribe : >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >> >
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