I don't know about the plugin, someone else will have to help with that.

On Mon, Mar 06, 2017 at 09:59:06PM +0000, Hexin Wang wrote:
> How about from neutron networking-ovn plugin connecting to both northbound 
> and southbound db?
> 
> Thanks.
> 
> Hexin
> 
> 
> 
> On 3/6/17, 12:56 PM, "Ben Pfaff" <[email protected]> wrote:
> 
> >It already is, see ovn-controller(8).  Note that ovn-controller only
> >connects to the southbound database.
> >
> >On Mon, Mar 06, 2017 at 07:16:51PM +0000, Hexin Wang wrote:
> >> Fair comment. In that case, is there any plan in making "inactivity probe" 
> >> interval configurable in ovn north and south dub connection?
> >> 
> >> Thanks,
> >> 
> >> Hexin
> >> 
> >> > On Mar 6, 2017, at 10:59 AM, Ben Pfaff <[email protected]> wrote:
> >> > 
> >> > If the application is extremely slow, then the connection is effectively
> >> > dead, and we might as well drop it anyway.
> >> > 
> >> >> On Mon, Mar 06, 2017 at 06:53:51PM +0000, Hexin Wang wrote:
> >> >> Hi Ben,
> >> >> 
> >> >> TCP keep alive gives a good alternative to use cases where there is no 
> >> >> firewall or proxy concern. Transport level keep alive is good enough 
> >> >> for ovsdb to determine if connection is alive or not, without worrying 
> >> >> if application is slow (or extremely slow) in open flow echo reply. 
> >> >> 
> >> >> Can we working on pushing this into ovs release?
> >> >> 
> >> >> Thanks.
> >> >> 
> >> >> Hexin
> >> >> 
> >> >> 
> >> >> 
> >> >>> On 3/2/17, 3:57 PM, "Ben Pfaff" <[email protected]> wrote:
> >> >>> 
> >> >>> We used application-level echo request and replies instead, because 
> >> >>> they
> >> >>> are reliable even if a TCP connection passes through a firewall or 
> >> >>> proxy
> >> >>> that does not properly pass through TCP keepalives.
> >> >>> 
> >> >>>> On Thu, Mar 02, 2017 at 11:48:04PM +0000, Hexin Wang wrote:
> >> >>>> Hi Ben,
> >> >>>> 
> >> >>>> What is the reason that it is not getting to the main release? This 
> >> >>>> seems the right keep alive mechanism for neutron to talk to ovn 
> >> >>>> database, if they are not running on the same host/container and 
> >> >>>> would have to use tcp as the transport.
> >> >>>> 
> >> >>>> Thanks.
> >> >>>> 
> >> >>>> Hexin
> >> >>>> 
> >> >>>> 
> >> >>>> 
> >> >>>> 
> >> >>>>> On 3/2/17, 3:45 PM, "Ben Pfaff" <[email protected]> wrote:
> >> >>>>> 
> >> >>>>>> On Thu, Mar 02, 2017 at 11:43:01PM +0000, Hexin Wang wrote:
> >> >>>>>> I have a question on the following patch that use TCP keep alive 
> >> >>>>>> for ovsdb connection.
> >> >>>>>> 
> >> >>>>>> https://mail.openvswitch.org/pipermail/ovs-dev/2011-April/251891.html
> >> >>>>>> 
> >> >>>>>> Did this patch go into ovs main release?
> >> >>>>> 
> >> >>>>> No.
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