FreeBSD & Software RAID
kirk at strauser.com
Tue May 26 19:00:28 UTC 2009
On Tuesday 26 May 2009 01:44:51 pm Gary Gatten wrote:
> What about with PAE and/or other extension schemes?
> If it's just memory requirements, can I assume if I don't have a $hit
> load of storage and billions of files it will work "ok" with 4GB of RAM?
> I guess I'm just making sure there isn't some bug that only exists on
> the i386 architecture?
My understanding is that it's much more than "just" the memory addressing.
ZFS is thoroughly 64-bit and uses 64-bit math pervasively. That means you
have to emulate all those operations with 2 32-bit values, and on the
register-starved x86 platform you end up with absolutely horrible performance.
Furthermore, it's just not that well tested. Sun designed ZFS for 64-bit
systems and I think 32-bit support was pretty much an afterthought.
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