new class / geom_cache / request for comments

[Eric Anderson]

R. B. Riddick wrote:
> --- Eric Anderson <anderson at centtech.com> wrote:
>> Just curious, how is this different/better than the regular buffer cache?
>>
> Hi Eric!
> 
> The buffer cache? :-)
> [This remembers me on the episode in The Simpsons where Mr.Burns tried to find
> the meaning of "re-cyc-ling" in his builtin dictionary]
> 
> Do you mean this cache of those file systems?
> If yes: The answer should be: "It just makes everything worse." (there is not
> even some read ahead...)

Not sure what I'm missing here, please clue me in.  I guess I am indeed 
talking about the cache normally used for filesystems.  If I read a 
500MB file in, first time it comes from disk, second time it comes from 
memory cache, correct?  How is geom_cache different?

> It is just useful, if you dont have any other caches (e. g. a ufs on a
> geom_raid5 (I think I should have it tomorrow... :-) ) on some geom_cache
> providers)...

I suppose I just need to play with it to completely understand..


Eric



-- 
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Eric Anderson        Sr. Systems Administrator        Centaur Technology
Anything that works is better than anything that doesn't.
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