Re: [Openstack] How to enable jumbo frames for instances ?

2014-01-28 Thread Narayan Desai
(these comments are from work we did with nova-network a while ago. These comments are only focused on the underlying kvm performance, not the gymnastics to get neutron to build out the right configuration) We've seen similar performance (around 3 Gbps) for GRE tunnels on machines that can easily

Re: [Openstack] How to enable jumbo frames for instances

2014-01-27 Thread Steve Rieger
gured MTU=8500 in all configure files, while the physical > NIC used for OVS (local IP) is using MTU=9000. > > > > Thanks. > > -chen > > > > *From:*Ageeleshwar Kandavelu [mailto:ageeleshwar.kandav...@csscorp.com] > *Sent:* Monday, January 27, 2014 9:57 PM

Re: [Openstack] How to enable jumbo frames for instances

2014-01-27 Thread Li, Chen
9:57 PM To: Li, Chen Cc: openstack@lists.openstack.org Subject: [Openstack] How to enable jumbo frames for instances Hi, Is it possible to have a higher MTU when your ethernet is limited to 1500? Thank you, Ageeleshwar K http://www.csscorp.com/common/email-disclaimer.php ___

[Openstack] How to enable jumbo frames for instances

2014-01-27 Thread Ageeleshwar Kandavelu
Hi, Is it possible to have a higher MTU when your ethernet is limited to 1500? Thank you, Ageeleshwar K http://www.csscorp.com/common/email-disclaimer.php ___ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : opens

Re: [Openstack] How to enable jumbo frames for instances ?

2014-01-27 Thread Heiko Krämer
son I want to use jumbo frames is I hope jumbo frames will use less CPU%, so that I can get higher bandwidth for a whole compute node. > > Thanks. > -chen > > > -Original Message- > From: Heiko Krämer [mailto:i...@honeybutcher.de] > Sent: Monday, January 27, 2014 4:11

Re: [Openstack] How to enable jumbo frames for instances ?

2014-01-27 Thread Li, Chen
compute node. Thanks. -chen -Original Message- From: Heiko Krämer [mailto:i...@honeybutcher.de] Sent: Monday, January 27, 2014 4:11 PM To: openstack@lists.openstack.org Subject: Re: [Openstack] How to enable jumbo frames for instances ? Hi Chen, first of all, the default supported n

Re: [Openstack] How to enable jumbo frames for instances ?

2014-01-27 Thread Gary Kotton
uot; mailto:openstack@lists.openstack.org>> Subject: [Openstack] How to enable jumbo frames for instances ? Hi list, I’m working under CentOS 6.4 + Havana + Neutron + OVS + gre. I’m testing performance for gre. I have a 10Gb/s NIC for compute Node. While, the max bandwidth I can get is s

Re: [Openstack] How to enable jumbo frames for instances ?

2014-01-27 Thread Heiko Krämer
Hi Chen, first of all, the default supported network driver for kvm supported only 1g. You can configure your MTU in your /etc/neutron/dnsmasq.conf on network node,like: dhcp-option-force=26,1454 MTU = 1454 You need to kill all dnsmasq processes on your network node and restart dhcp agent. In

[Openstack] How to enable jumbo frames for instances ?

2014-01-26 Thread Li, Chen
Hi list, I'm working under CentOS 6.4 + Havana + Neutron + OVS + gre. I'm testing performance for gre. I have a 10Gb/s NIC for compute Node. While, the max bandwidth I can get is small then 3Gb/s, even I have enough instances. I noticed the reason the bandwidth can't reach higher is due to the