Re: [ovirt-users] Bandiwdth limit on a Virtual Machine

On Mon, Feb 13, 2017 at 8:30 PM, Fernando Frediani < fernando.frediani(a)upx.com.br&gt; wrote: > Hello Yaniv. > > Yes that exactly the bonding hash I am using layer3+4. > > I have another server where I run simple libvirt/KVM in a similar > scenario e it does balance the traffic well between all physical interfaces > on the host as there are many individual connections to the VM. > > But my question was if there was anything that hard limit any VM traffic > to 1Gb unless you change and also what the speed the is shown on the > interface is related to ? 1Gb, 10Gb or if you can set that specifically ? > Nope, no limit. It's just when virtio was invented they needed to give it some speed (to show in Windows, ethtool, etc.) and 1Gb seemed like a good nice number. It's not enforced anywhere. Y. > Fernando > > On 13/02/2017 16:25, Yaniv Kaul wrote: > > > > On Mon, Feb 13, 2017 at 6:25 PM, Fernando Frediani < > <fernando.frediani@upx.com.br&gt;fernando.frediani(a)upx.com.br&gt; wrote: > >> Hello. >> >> Is there any limitation of bandwidth for a Virtual Machine per default ? >> >> I have a host with a bonding of 3 x 1Gb and the VM is connected to that >> bonding. On the Engine interface on the VM status I see "Network" and it >> has a percentage and a tiny graph. What that percentage is related to ? 1Gb >> ? 3Gb ? 10Gb ? >> >> Is there anything that has to be done in order the VM can achieve speeds >> over 1Gbps ? >> > > To the external network, you cannot easily achieve >1Gb, unless you open > multiple connections that will go over multiple physical NICs. It depends > on the bond hashing policy. layer3+4 might make it easier to achieve. This > is not very different than a connection from the host. (I think UDP should > be easier, but it's less interesting?) > > VM to VM traffic should easily overcome 1Gbps. > Y. > > >> >> >> Fernando >> >> _______________________________________________ >> Users mailing list >> Users(a)ovirt.org >> http://lists.ovirt.org/mailman/listinfo/users >> >> > >