[Opensim-users] standalone vs. grid

[Paul Fishwick]

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>> 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>
>     Dept. of Computer & Info       Phone & FAX: (352) 392-1414
>      Science and Engineering       WWW:
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>     <http://www.cise.ufl.edu/%7Efishwick>
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>     address)
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>
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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