Will XFS be adopted

Peter Schuller peter.schuller at infidyne.com
Tue Nov 18 09:52:12 PST 2008


> YES! In my opinion it's not even appropriate for a machine with 2GB of
> RAM. Why waste so much RAM on an FS? Does anyone know? Or is this some
> sort of conspiracy to sell more bgger boxes. It's Sun, afterall....

I don't know whether, when people say this, they are just trying to
spew FUD or they really don't realize the distinction. But regardless,
please note that ZFS does not "waste" 2 GBs of memory. The memory it
"uses" has to do with the fact that it has a dedicated cache - the ARC
- that is distinct from the otherwise operating system integrated
buffer cache.

Now I *fully* realize that this sucks for some use cases (I have such
use cases myself) where you simply do not want to reserve a portion of
memory to file system caching. I also realize that the issues people
have in terms of forcing the ARC to be really small can be a problem.

However, the implication when people say that ZFS "wastes" a bunch of
memory, seems to be that it somehow just uses up a bunch of memory for
no good reason other than some kind of bloat. This is not the case.

-- 
/ Peter Schuller

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