[ovs-discuss] data path limit

Ben Pfaff blp at nicira.com
Tue Aug 28 14:37:42 UTC 2012


We haven't measured performance with a very large number of datapaths,
because this is not a common case.  Perhaps the performance is fine.

You can create more than one tunnel per datapath.  I don't know why
Quantum would create only one tunnel per datapath.

On Tue, Aug 28, 2012 at 06:19:40PM +0800, faicker mo wrote:
> Data path number affects the performance ?
> Ryu, an openstack quatumn plugin, uses the gre tunnel of OVS.
> The tunnel is created between any 2 hosts. The tunnel number will be N-1(N is the host number). The number will be greater than 255 one day.
> 
> On 2012-8-27, at 21:42, Ben Pfaff <blp at nicira.com> wrote:
> 
> > Perhaps you should explain a little bit.  Usually, only a few datapaths
> > are needed.  More than 255 is a surprising number.
> > 
> > On Mon, Aug 27, 2012 at 02:21:57PM +0800, faicker mo wrote:
> >> I did a test, the data path number can be greater than 255. 
> >> Yeah, we are estimating the project. With tunnel, it will be soon over 255.
> >> 
> >> On 2012-8-27, at 12:16, Ben Pfaff <blp at nicira.com> wrote:
> >> 
> >>> On Mon, Aug 27, 2012 at 11:57:23AM +0800, faicker mo wrote:
> >>>> Does the OVS really have the limit of data path number 256 per machine
> >>>> In OVS 1.7.0?
> >>> 
> >>> No.
> >>> 
> >>> Are you really approaching this number of datapaths?
> >> 
> 



More information about the discuss mailing list