[Opensim-users] grid operation

[Paul Fishwick]

Got it. So, the data are stored on the asset server. If this is
so, it doesn't seem that my region server (the opensim instance
I might run as part of someone's grid) is doing much of
anything since any change in prim or agent attribute must be
conveyed back to the grid's asset server.
-p

Diva Canto wrote:
> By "assets" I mean the data itself, the blobs/text/etc.
> The region prims/primitems storage holds only references to that data.
>
> Look inside OpenSim.db. There is no "data" there, only meta data and 
> references to the data (by UUID) stored on the asset server.
>
> Paul Fishwick wrote:
>> When you say the prims and primitems are not assets, I am confused.
>> My understanding was that all items are assets, identified by their unique
>> UUIDs. If I follow the point about the asset server, the asset servers
>> stores all asset UUID references by region, but that the specific asset
>> attributes (i.e., position of an object, or its texture) are stored by UUID
>> in the region's DB?
>> -p
>>
>>
>> Diva Canto wrote:
>>   
>>> The asset server holds the assets for the entire collection of regions 
>>> on that physical grid. For example, when you create an object inworld, 
>>> the asset corresponding to that object is stored on the asset server.
>>>
>>> The region caches some assets in memory. For example, in that creation 
>>> scenario, the asset would be on the cache of the region too.
>>>
>>> The region also has a database storing "prims" and "primitems". These 
>>> are not assets; they are the prims that are inworld at any given time. 
>>> The prims refer to assets (by UUID) that are stored on the asset 
>>> server. Which, as the previous sentence says, may be cached in memory 
>>> of the region.
>>>
>>> Paul Fishwick wrote:
>>>     
>>>> Right. But what, exactly, are these servers doing?  I guess I am trying
>>>> to get at more of the architectural details of what types of messages are
>>>> sent among servers (over the network and to the database(s)). For
>>>> example, there are the UGAIM servers in grid mode. Does the grid's "A"
>>>> server hold all of the assets on your region that  you plugged into the
>>>> grid? Or does your region database (on the same computer as your
>>>> opensim.instance) take care of that?
>>>> -paul
>>>>
>>>>
>>>> Ideia Boa wrote:
>>>>   
>>>>       
>>>>> If you run 1 region in a grid, you only run OpenSim server, the others 
>>>>> servers (User, Grid, Asset, Inventory and Message) are running on the 
>>>>> Grid servers with the grid OpenSim server.
>>>>>
>>>>>
>>>>>
>>>>> Paul Fishwick wrote:
>>>>>   
>>>>>     
>>>>>         
>>>>>> If one hooks a region to a grid, what functions does the
>>>>>> region server (operating on your computer) perform? The
>>>>>> Grid servers are running asset and inventory management,
>>>>>> so does this mean that the grid A and I machines handle
>>>>>> the assets and inventory or is that the function of the region
>>>>>> server that connects to the grid?
>>>>>> -p
>>>>>>
>>>>>>   
>>>>>>     
>>>>>>       
>>>>>>           
>>>>>   
>>>>>     
>>>>>         
>>>>   
>>>>       
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>>
>>
>>   
>
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-- 
Paul Fishwick, PhD
Professor and Director, Digital Arts and Sciences Programs
University of Florida
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