[ovs-discuss] data path limit

faicker mo faicker.mo at gmail.com
Wed Aug 29 01:58:30 UTC 2012


Sorry, I mixed up the datapath and the port in datapath.
Thank you for your patience. Every tunnel is a port in a datapath like system at br0.

On 2012-8-28, at 22:37, Ben Pfaff <blp at nicira.com> wrote:

> 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?
>>>> 
>> 




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