[Opensim-users] Awaiting region handshake

Sat Aug 20 01:28:05 UTC 2011

This then leads to the question, can a standalone be changed over to grid?

If you use a mysql backend for the standalone, can it just be changed over
to grid in the configs?

On Sat, Aug 20, 2011 at 3:52 AM, Diva Canto <diva at metaverseink.com> wrote:

> See basic definitions here, which is the model that has been guiding
> OpenSim development for a while:
> http://opensimulator.org/wiki/Virtual_World_Model
>
> In principle, the concept of grid is orthogonal to the concept of simulator
> trust domain. In practice, and in the vast majority of cases, they are
> unified (i.e. 1 grid = 1 trust domain), but in a few but famous cases, they
> aren't -- that's the case of OSGrid, which is a grid with several simulator
> trust domains in it. If the concept of "simulator trust domain" is too
> abstract, substitute the expression "multiple simulator trust domains" by
> "connecting someone else's simulator to a grid".
>
> Technically, what makes a grid being a grid is having multiple simulator
> servers serving different portions of the virtual space, instead of just one
> simulator server -- that's all. One can run a grid with an external resource
> server (Robust, Simian) or without, using only simulator servers and a
> shared DB; the latter configuration is what I call serverless grids:
> http://opensimulator.org/wiki/Serverless_Grids -- that article is
> outdated, but it explains the concept.
>
> When there are multiple simulators (=grid), whether the simulators are
> operated by the same authority or decentralized by several authorities is a
> different issue. For example, the Avination grid and the SL grid are each
> operated entirely by one authority; the OSGrid grid is operated by a
> multitude of authorities [that must implicitly trust each other at the
> moment].
>
>
>
> On 8/19/2011 8:13 AM, Bob Wellman wrote:
>
> I have run Opensim both standalone as standalone and for the last three
> years PMgrid in grid mode so I understand the differences very well.
>
> However I can see where newcommers get confused when we talk about grids
> beings a collection of regions and then use the term "grid mode" to mean
> running using several servers or service instances in collaberation to run a
> grid.
>
> I have often wondered if it wouldnt be better to coin a different term
> for what we currently call grid mode to avoid confusion. Maybe we could
> use Cooperative mode or Multi Service mode or Distributed mode to describe
> the alternative mode to Standalone. Something that better decribes the mode
> of operation rather than "grid" which I think should be used just to
> describe the region arrangement. Just a thought!
>
> When Intels DSG work hits mainstream (soon I hope) we will need to
> distinguish grids that run using the current central Robust.exe(s) and one
> or more Opensim.exe instances (i.e. what we now call "Grid mode") to those
> that run the new even more Distrubuted services provided by DSG.
>
> Getting good clear terminology for mdes of operation defined now would help
> a lot in future I think.
>
> Like I say just my thoughts. Any one else have thoughts on this?
>
>
>
> > Date: Fri, 19 Aug 2011 11:11:25 +0100
> > From: t.gildersleeve at bradfordcollege.ac.uk
> > To: opensim-users at lists.berlios.de
> > Subject: Re: [Opensim-users] Awaiting region handshake
> >
> > Thanks for the clarification Diva, me jumping in too quickly I guess.
> >
> > I didn't think a standalone accepted region registration requests from
> > other opensim.exe's, but that you needed robust.exe to accept
> > registrations from other opensim.exe's. I know that opensim.exe
> > handles all the services when in standalone - but thought it was "cut
> > down" and didn't support external region registrations. I take it from
> > what you say it can do that? I've never even tried tbh.
> >
> > What you say about owners not supporting ad-hoc regions being connected
> > is of course true but that is a policy issue and enforced by firewall
> > rules. As far as I am aware robust.exe WILL accept a registration
> > request from other opensim.exe's if the port to it is left open. Of
> > course, I may well be wrong with that but when I asked about this before
> > (if there was any way to stop people registering with my grid - I was
> > told I had to block the port and that would be the way to do it).
> >
> > -----Original Message-----
> > From: opensim-users-bounces at lists.berlios.de
> > [mailto:opensim-users-bounces at lists.berlios.de<opensim-users-bounces at lists.berlios.de>]
> On Behalf Of Diva Canto
> > Sent: 18 August 2011 20:56
> > To: opensim-users at lists.berlios.de
> > Subject: Re: [Opensim-users] Awaiting region handshake
> >
> > > I believe you can create as many regions as you like in a standalone
> > > but you are the only person that can go there I have created both and
> > > to have other ppl come to visit you need to be a grid
> >
> > This is not correct. Standalones can handle users from anywhere in the
> > world, as long as the routers are configured for that.
> >
> > > Basically, a standalone does not allow others to connect their region
> > > to your simulator, while a grid does. This has nothing to do with
> > > people visiting it.
> >
> > This is also not correct.
> > Most grids are operated by one single organization/person and don't
> > support the attachment of ad-hoc regions operated by others. OSGrid is
> > an exception in this respect.
> >
> > The difference between a standalone and a grid is simply the number of
> > components (usually hardware) involved. A standalone has all services
> > running in one single process in one single machine; a grid has many
> > simulator processes, usually on different machines, and it typically
> > centralizes resource management in yet other machine(s).
> >
> > So if you just want a small world with a few thousand objects in world
> > at any given time, stay with a standalone; if you plan to scale up, look
> > into the grid configuration.
> >
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