Again, I should understand the direction you ack here ... and its not clear in any way I try to read it
lets summaries current status:
master == v4.17.999 (I recalled 4.18 tag for 4.0... probably it hasn't happened yet)
ovit-3.6.3 last commit points to v4.17.23 (and also contains in its history 4.17.22 4.17.21 4.17.20 and 4.17.19
ovirt-3.6 == was not tagged since v4.17.19

So, as far as I see - last "official published" version is tagged anyway. once we'll finish with z-streams, we can continue tagging only on ovirt-3.6 branch. but as long as we publish new snapshots (or z-stream releases as I call them) we can continue the tagging only on ovirt-3.6.3 branch 

The rest of your suggestions can't help in any way. if you prefer you can use 4th level versioning (4.17.x-y) later on. but currently we just continue to raise the current 4.17 we have
 
now, getting back to the origin mail that Sandro sent:

""" snip
vdsm-4.17.19-32.git171584b.el7.centos.src.rpm because the last tag on the 3.6 branch was 4.17.19 and new tags have been created in different branches.

this is correct - no problem with that approach, new tag still will be higher then 4.17.19 as we see with 4.17.23

> This make impossible to upgrade from stable (4.17.23) to latest snapshot.

But we just said that stable (ovirt-3.6) is 4.17.19 and latest is 4.17.23 - so it sounds right to me.

> This also break dependencies on other projects requiring the latest released version like hosted engine.

No its not. HE may require 4.17.23 which is the latest we publish as part of 3.6.3

"""

Yaniv Bronhaim.

On Mon, Mar 7, 2016 at 1:58 PM, Dan Kenigsberg <danken@redhat.com> wrote:
On Mon, Mar 07, 2016 at 12:06:32PM +0200, Nir Soffer wrote:
> +1
>
> On Mon, Mar 7, 2016 at 10:29 AM, Sandro Bonazzola <sbonazzo@redhat.com> wrote:
> >
> >
> > On Mon, Mar 7, 2016 at 9:03 AM, Martin Perina <mperina@redhat.com> wrote:
> >>
> >>
> >>
> >> ----- Original Message -----
> >> > From: "Yaniv Bronheim" <ybronhei@redhat.com>
> >> > To: "Martin Perina" <mperina@redhat.com>
> >> > Cc: "Nir Soffer" <nsoffer@redhat.com>, "Sandro Bonazzola"
> >> > <sbonazzo@redhat.com>, "Francesco Romani"
> >> > <fromani@redhat.com>, "Dan Kenigsberg" <danken@redhat.com>, "devel"
> >> > <devel@ovirt.org>
> >> > Sent: Monday, March 7, 2016 8:16:05 AM
> >> > Subject: Re: [ovirt-devel] [URGENT][ACTION REQUIRED] vdsm versioning
> >> > system need to be fixed
> >> >
> >> > I don't understand what's the different .. that's what we currently do.
> >> > Sandro complains that he can't upgrade latest stable which can be
> >> > 4.17.23
> >> > to latest snapshot which can be 4.17.19.88 \ 4.17.19-88 - yum can't
> >> > consider that as an upgrade and 4.17.19.88 can't fill HE requirement for
> >> > 4.17.23
> >>
> >> oVirt 3.6 stable release:
> >>   - current [1]: vdsm-4.17.23-0.el7.centos.noarch.rpm
> >>   - desired:     vdsm-4.17.23-1.el7.centos.noarch.rpm
> >>
> >> oVirt 3.6 stable snapshot:
> >>   - current [2]: vdsm-4.17.19-32.git171584b.el7.centos.noarch.rpm
> >>   - desired:     vdsm-4.17.24-0.1.git171584b.el7.centos.noarch.rpm
> >>
> >> oVirt master snapshot:
> >>   - current [3]: vdsm-4.17.999-680.gitd87d031.el7.centos.noarch.rpm
> >>   - desired:     vdsm-4.18.0-0.680.gitd87d031.el7.centos.noarch.rpm or
> >>                  vdsm-5.0.0-0.680.gitd87d031.el7.centos.noarch.rpm
> >>     (not sure what will be oVirt 4 vdsm version)
> >>
> >
> >
> > +1

the down side of that is that we'd need to forsake our ability to
release a new version by a mere `git tag`, and would have to include a
version bump commit instead.



--
Yaniv Bronhaim.