We are using the latest hot fixes with xencenter 6.0 including the one mentioned below.
What we noticed was that the openvswitch was running in user mode (for the default xencenter 6.0) installation ! We manually pulled in ovs sources and installed it as kernel module and things are much better now. Can someone pls point me to a high level architecture of the ovs data path ? Looking at the ovs-1.3 code to understand this meanwhile :) -vijay On Fri, Jan 20, 2012 at 1:58 PM, Jesse Gross <je...@nicira.com> wrote: > On Thu, Jan 19, 2012 at 6:31 PM, Vijay Chander <vijay.chan...@gmail.com> > wrote: > > We are having performance issues with XEN as opposed to VMWARE. > > > > Pls take a look at the following cases (OVS - open vswitch, Bridge - > native > > linux bridging) > > > > Case 1 (no VM guest tagging): VM1 VNIC1 ---- (no tag) --- OVS > > ---(vlan X) --- PNIC1 ------(vlan X)--------- PNIC2 ---- (vlan > X) > > ---- OVS --- (no tag) --- VNIC2 ---- VM2 > > Case 2 (no VM guest tagging): VM1 VNIC1 ---- (no tag) --- Bridge > > ------ PNIC1 ------(vlan X)--------- PNIC2 ---- (vlan X) ---- > > Bridge --- (no tag) --- VNIC2 ---- VM2 > > Case 3 (VM guest tagging): VM1 VNIC1 ---- (vlan X) --- OVS > > ---(vlan X) --- PNIC1 ------(vlan X)--------- PNIC2 ---- (vlan > X) > > ---- OVS --- (vlan X) --- VNIC2 ---- VM2 > > Case 4 (VM guest tagging): VM1 VNIC1 ---- (vlan X) --- Bridge > > ---(vlan X) --- PNIC1 ------(vlan X)--------- PNIC2 ---- (vlan > X) > > ---- Bridge --- (vlan X) --- VNIC2 ---- VM2 > > > > Case 4 does not work. So we moved to using OVS (open vswitch) because > Case 3 > > works. > > > > But performance for Case 2 is much better than performance for Case 1. > This > > is making us think > > about using bridging instead of open vswitch. Any reason why this is the > > case ? > > The was a bug in the version of Open vSwitch that shipped with > XenServer 6.0. Citrix has issued a hotfix: > http://support.citrix.com/article/CTX131745 >
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