[Opensim-users] standalone vs. grid
Paul Fishwick
fishwick at cise.ufl.edu
Wed Nov 26 15:37:11 UTC 2008
What do you think of the following. Let me know if my
assumptions are incorrect:
1. Logical Space is defined as following:
1.1 A Grid contains one or more Estates in a Cartesian space
(Grid coordinates define Regions (i.e., Sims)
1.2 An Estate contains one or more Regions (i.e., Sims)
1.3 A Region contains one or more Parcels
2. Physical space is defined by Mode
2.1 StandAlone Mode is one computer, running one instance
of Opensim.exe
2.2 Grid Mode is one or more computers in the following configurations:
2.2.1 Client Config: A region connected to a grid (i.e., OSGrid)
In Config 1, the client runs its own
opensim.exe, and
its own database to handle that region's activities
2.2.2 Server Config: UGAIM server machine(s) that maintain
client
Regions (note: Client and Server could be the
same machine)
2.2.3 Hypergrid Config (evolving): freeform hyperlinked
model, more
like how the web functions than a client/server
model.
Thoughts welcome. BTW, in Space #2. Server Config, does OSGrid
run its own Opensim.exe or is that needed only by the Region simulators
that connect to it?
-p
Lc wrote:
> Commonly used : A grid is more an architectural view :
> One centralised UGAIM where several regionsServer can logged and
> share ressources.
>
> Sacha
>
> On Wed, Nov 26, 2008 at 3:49 PM, Paul Fishwick <fishwick at cise.ufl.edu
> <mailto:fishwick at cise.ufl.edu>> wrote:
>
> Thanks, there is some confusion in use of the word "grid" in the
> web pages.
> I have been gathering information to create a tutorial on getting
> started, which
> is why I am asking the questions.
>
> For example, see: http://opensimulator.org/wiki/Configuration
>
> Under "Standalone mode", there is the phrase "Grid Location". But this
> isn't a grid
> location because in Standalone mode one is not running a grid -- it is
> the location in
> something else: an Estate? Then, in the discussion of "multiple
> regions", there is
> discussion of "grid coordinates". All of this is confusing if one
> is not
> using a grid.
>
> Here is my understanding:
>
> An Estate is a set of Regions
> A Region is the same thing as a Sim (65,536 sq. meters)
> A collection of Sims (or equivalently, Regions) is an (Estate) ?
>
> These are logical distinctions, whereas, the term "grid" seems to be
> an architectural or physical distinction (i.e., how logical
> concepts map
> to physically located server equipment).
>
> -p
>
>
>
>
> Lc wrote:
> > short answer :
> >
> > standalone : all services and regions are one program that can
> handle
> > x regions (the files under Regions/*.xml) as long as your system
> > support it.
> > Grid : all the services could be spread on diferents computers
> > eventually, and the same or any other computer could run the region
> > server.
> >
> >
> >
> > On Wed, Nov 26, 2008 at 2:21 PM, Paul Fishwick
> <fishwick at cise.ufl.edu <mailto:fishwick at cise.ufl.edu>
> > <mailto:fishwick at cise.ufl.edu <mailto:fishwick at cise.ufl.edu>>>
> wrote:
> >
> > Still trying to get my head around the exact differences between
> > StandAlone vs. Grid. At one time, I thought the word "grid"
> meant
> > the rectangular configuration of regions. Is this rectangular
> > collection
> > of regions called the "sim" instead ? I can see that in grid
> > mode, one
> > could
> > fire up each of the 5 main servers + the OpenSim process,
> each on
> > a separate computer. One would just reset the .xml files to
> point to
> > the correct IPs and database(s)?
> >
> > However, could one partition the sim by computer? If so, what is
> > the mapping of computers to sim in terms of where the
> database(s)
> > are located and where the 6 processes are located (UGAIM +
> > OpenSim)?
> >
> > For example, if I were to recommend that at the university
> level,
> > they should have a grid of, say, 16x16 regions, could this
> be divided
> > into 4 4x4 sims, each having separate sets of computers?
> Thanks --
> > I've looked online but have not seen this level of detail--I
> may be
> > looking in the wrong place.
> > -paul
> >
> >
> > --
> > Dr. Paul A. Fishwick E-Mail: fishwick at cise.ufl.edu
> <mailto:fishwick at cise.ufl.edu>
> > <mailto:fishwick at cise.ufl.edu <mailto:fishwick at cise.ufl.edu>>
> > Dept. of Computer & Info Phone & FAX: (352) 392-1414
> > Science and Engineering WWW:
> > http://www.cise.ufl.edu/~fishwick
> <http://www.cise.ufl.edu/%7Efishwick>
> > <http://www.cise.ufl.edu/%7Efishwick>
> > University of Florida (PGP Key available at above WWW
> > address)
> > P. O. Box 116120
> > 332 Bldg. CSE, Gainesville, FL 32611-6120
> >
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>
> --
> Dr. Paul A. Fishwick E-Mail: fishwick at cise.ufl.edu
> <mailto:fishwick at cise.ufl.edu>
> Dept. of Computer & Info Phone & FAX: (352) 392-1414
> Science and Engineering WWW:
> http://www.cise.ufl.edu/~fishwick
> <http://www.cise.ufl.edu/%7Efishwick>
> University of Florida (PGP Key available at above WWW
> address)
> P. O. Box 116120
> 332 Bldg. CSE, Gainesville, FL 32611-6120
>
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--
Dr. Paul A. Fishwick E-Mail: fishwick at cise.ufl.edu
Dept. of Computer & Info Phone & FAX: (352) 392-1414
Science and Engineering WWW: http://www.cise.ufl.edu/~fishwick
University of Florida (PGP Key available at above WWW address)
P. O. Box 116120
332 Bldg. CSE, Gainesville, FL 32611-6120
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