[Opensim-users] Consequences of vicinity

[Diva Canto]

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>
> *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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