[ovs-dev] [PATCH ovn v3 07/10] ovn: Add tunnel_key concept to Bindings table, assign in ovn-northd.

[Russell Bryant]

On 04/29/2015 12:22 PM, Justin Pettit wrote:
> 
>> On Apr 29, 2015, at 6:34 AM, Russell Bryant <rbryant at redhat.com> wrote:
>>
>> I wonder how realistic it would be to have 65k ports and hit this as a
>> limit.  If your deployment has many containers in each VM, it seems like
>> we could hit that much more quickly than traditionally seen before.
> 
> I had the same thought around containers.  I think we need to assume
> we'll hit 65k ports in the whole system pretty quickly.
> 
>> If a protocol can fit a whole UUID in tunneled packets, I suppose we
>> could optionally switch to using the logical port UUID later?
> 
> The whole UUID seems like a lot of overhead.  I'll start a new thread
> to discuss how we want to handle end-point identification.  If we did
> a schema like use a 24-bit logical network id and a 16-bit logical
> port number that should scale fine.  Even if we do a good job with
> broadcast suppression, 65k ports in a subnet is still probably
> pushing practical limits.
> 
> I'll get that new thread started.

OK, great.  I missed your comments about this before posting my
response.  Sorry about that.

-- 
Russell Bryant