I will now revert only in the following points:
> How about using $rundir/ovnnb_db.sock and $rundir/ovnsb_db.sock instead
> of the new directory?


For High Availability we need to have the dbs on a directory that we can easily 
share between hosts.

We can do this by default or make it optional using env variables. I prefer the 
first but nothing against the other.

> Any reason not to use the old approach of removing/re-adding the db
> without restarting the ovsdb-server process?


We can but I don’t really like the approach of using ovs-appctl in this way the 
two database are focused so the overhead of re-running should be not so big…

> On 08 Feb 2016, at 17:37, Ryan Moats <rmo...@us.ibm.com> wrote:
> 
> Russell Bryant <russ...@ovn.org <mailto:russ...@ovn.org>> wrote on 02/08/2016 
> 10:24:29 AM:
> 
> > From: Russell Bryant <russ...@ovn.org <mailto:russ...@ovn.org>>
> > To: Ryan Moats/Omaha/IBM@IBMUS, Michael <michael.arna...@mymoneyex.com 
> > <mailto:michael.arna...@mymoneyex.com>>
> > Cc: dev@openvswitch.org <mailto:dev@openvswitch.org>
> > Date: 02/08/2016 10:24 AM
> > Subject: Re: [ovs-dev] [PATCH 1/1] ovn/utilities: Separating OVN NB 
> > and SBdatabases. Run dbs in separate
> > 
> > On 02/08/2016 11:17 AM, Ryan Moats wrote:
> > > For devstack, we need a few more things:
> > 
> > Context: devstack is an OpenStack development environment.  Our OVN
> > integration pre-dated ovn-ctl, but we'd like to start using it.
> > 
> > > 1) the ability to start and stop the ovsdb processes separate from
> > > ovn-northd, so this patch needs to break them out as separate commands.
> > 
> > It seems most common that you'd run ovn-northd and both ovsdb-server
> > instances all on the same host right now, so I'd be OK with this being a
> > future enhancement.  devstack enforces this right now, as well.
> 
> IIRC, the issue is that ovsdb-server has to be started at an earlier point
> than ovn-northd during stacking.
> 
> > > 2) the logfile settings for vconsole and vfile need to use environment
> > > variables so that we can control their level at start up
> > 
> > indeed, those would be nice enhancements as well, but could be follow up
> > patches.
> 
> Russell, we can do that, but both of these items are things that I see as
> being necessary to get to parity to https://review.openstack.org/#/c/276364 
> <https://review.openstack.org/#/c/276364>
> and its follow-on patches.
> 
> Ryan
> 


Michael Arnaldi - Chief Technology Officer (CTO)

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Mail: michael.arna...@mymoneyex.com
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