[ovs-discuss] A Question about the scale of OVS's forwarding database and hash map

Han Zhou zhouhan at gmail.com
Tue Dec 8 17:59:52 UTC 2015


It really depends on how you design the control plane.
In a reasonable design, even for full mesh topology, the number of
entries on a single node should be O(n), although the total number of
flows on all nodes will be O(n^2).

Han

On Thu, Dec 3, 2015 at 2:51 PM, Dan Huang <huangdan226 at gmail.com> wrote:
>
> Hi
>
> I am interested in the scalability of OVS. Supporse that I want to deploy a
> virtual network on a large cluster (multiple sites). The number of nodes
> might be ( 1000- 5000) and the VMs about ( 10000-50000).
> If each node has an OVS. And OVSs are connected to full mesh topology. Then
> the forwarding db at least contains 10000 by 10000 to 50000 by 50000
> entries. Will this scale of setting cause some issues on OVS ?  For example,
> delayed forwarding or cache missing increasing? I know that OVS can cache
> the forwarding entries in HMap.
>
> Thanks
>
> Dan
>
>
> --
> Best Regards
> Dan Huang
>
> Skype: huangdan226
>
> _______________________________________________
> discuss mailing list
> discuss at openvswitch.org
> http://openvswitch.org/mailman/listinfo/discuss
>



-- 
Best regards,
Han



More information about the discuss mailing list