[Opensim-dev] Always mutable assets in OpenSim -- does it make sense?

[Sean Dague]

Melanie wrote:
> This is not about mutable notecards. This is about one particular 
> case, attachment editing, and the desire to avoid thousands of dead 
> assets being created by a single long attachment editing session, 
> while at the same time not wanting to lose the work people have done 
> in a crash.
> I never intended to have this mutate into a discussion on changing 
> the basic paradigm of immutable assets, but just to get one 
> exception to that rule in one case where it is safe to do so and 
> provides the most elegant solution for an otherwise tricky issue.
> 
> I am very unhappy that this got derailed into a discussion about 
> making all assets mutable. This is not what i intended.
> 
> I may be better off maintaining nice, clean, working attachment 
> persistence as a private patch.

Melanie,

If this is just about dead assets why not just open up a delete
interface to the asset database?  A database update to a blob isn't
substantially faster than delete / insert.  That's what was done with
the osDynamicTexture calls so that we stopped filling up the caches with
long dead assets.

I understand that updatable assets is a solution here, but it does open
up a can of worms.  If an interface is there for mutable assets someone
else will decide "well, it would make case X easier, so I'll use it
there" and not really understand that it's not going to do what they want.

Another issue with updateable assets is that it would make sha1 uuids
impossible.  I'd hate to give that one up for future implementation.

	-Sean

-- 
Sean Dague / Neas Bade
sdague at gmail.com
http://dague.net


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