[Opensim-users] Consequences of vicinity

[BlueWall Slade]

It just means that we (on OSgrid) will need to coordinate our upgrades with
our neighbors to be sure we can interop as usual.

To help in testing head, we might consider construction of an "Alpha"
continent away from the mainland, where all the regions are running close to
head (as many of us in OSgrid do).

Thoughts?

On Tue, Dec 30, 2008 at 6:32 PM, Diva Canto <diva at metaverseink.com> wrote:

>  Charles,
>
> This has nothing to do with the hypergrid. This is about having neighbors
> that are on the same grid but running different, incompatible, versions of
> opensim -- incompatible as in incompatible inter-simulator communications
> (not as grid-region communications).
>
> Crista
>
> Charles Krinke wrote:
>
>  Hang on. We are getting afield a bit. There are several goals and tests
> going on in OSGrid that have nothing to do with HyperGrid.
>
> One of these is developing a mainland, which by its nature needs sims side
> by side. Another is testing region crossings at sides and corners, which
> also by its nature needs sims side by side.
>
> I admire and respect Diva's work, but lets also not loose sight of the
> other considerations that led to us creating a grid in the first place.
>
> Those who wish to work on HyperGrid notions may certainly put their regions
> away from the growing mainland at 10000,10000. I believe that the area less
> then 4096, 4096 may be more suitable for HyperGrid notions as it bypasses
> the "4096 arithmetic problem" in the client.
>
> Charles
>
>  ------------------------------
> *From:* Justin Clark-Casey <jjustincc at googlemail.com><jjustincc at googlemail.com>
> *To:* opensim-users at lists.berlios.de
> *Sent:* Tuesday, December 30, 2008 8:33:29 AM
> *Subject:* Re: [Opensim-users] Consequences of vicinity
>
> Diva Canto wrote:
> > Justin Clark-Casey wrote:
> >> Is it worth updating the interface version number in
> OpenSim.Framework.Servers.VersionInfo to ensure that this is
> >> enforced automatically for grids?
> >>
> >>
> > Yes, to some extent, but not completely. This is about sim-sim comms,
> > not sim-grid comms. Therefore if you have a running sim connected to
> > osgrid who's owner is on vacation, that sim will continue to run -- and
> > maybe cause problems to the neighbors -- even if you bump up the version
> > number in Servers. We would need to check the version number on
> > inter-region comms, not just on region registration with the grid. Or
> > else on region registration, the grid server should look into the
> > VersionNumber of the potential neighbors and warn/disallow registrations
> > when the version numbers are not compatible.
>
> In principle, a grid server that has been upgraded could, on restart, kick
> off regions that have an interface number
> that is now too low.  This would be for a grid administrator that wants to
> ensure a smooth inter-region experience on
> the grid.
>
> In practice, a grid administrator might want to be more lenient (perhaps
> notification rather than kick).
>
> I guess you could have a grid that allows different clusters of regions
> where those regions use a different/old
> interface than other region clusters on the grid, yet all clusters used the
> same grid comms.  The problem of teleport
> (in which you still travel between disconnected clusters) might require a
> different interface version than an interface
> for neighbouring sims.
>
> Nonetheless, in practice people who don't read these lists will continue to
> put sims side by side.  If the version
> number isn't bumped we may well see an upsurge in questions and confusion
> which we saw not long ago when OpenSim
> revisions crossed interface incompatibility thresholds (whether grid <->
> sim or sim <-> sim).
>
> Perhaps this is something that grid admins can give input on.  Do you think
> the interface version number should be
> bumped with neighbour interface changes to stop people having problems when
> they are neighbouring regions with
> incompatible versions?  Or should people always be instructed to keep
> regions away from each other unless they are sure
> that their neighbours are going to update in sync with themselves.
>
> --
> justincc
> Justin Clark-Casey
> http://justincc.wordpress.com
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