[clug] zfs on linux

Richard C richard_c at tpg.com.au
Mon Jul 22 18:44:42 MDT 2013

Chef Chef,

Other than a quick "I told you so...", I'll skip on to asking about how
much RAM your server has? ZFS is renown for sucking up RAM in vast amounts
(relative to other filesystems). The FreeNAS peeps seem to think that 4-8GB
is a (barely) working minimum, and then add more for any application or ZFS
feature, you may be running [1]. I imagine that the Linux port is somewhat
more greedy.

Your server is in danger of having more RAM than disk (not wrong per se,
but certainly unorthodox).

Does btrfs have enough of the feautures that you want?


[1] http://doc.freenas.org/index.php/Hardware_Recommendations

On 19 July 2013 23:35, David C <cottrill.david at gmail.com> wrote:

> Hello all,
> I replaced FreeBSD with Debian Wheezy tonight after a reasonably serious
> root drive failure.
> Given that all my data drives are ZFS and the Linux port is not optimised,
> would anyone like to offer an opinion about my NFS4 speeds, which are not
> optimised in FreeBSD.
> Of some note is that this system is built on an HP N40L microserver with
> (brace yourselves) 5400rpm 750GB disks.
> More of a hypothetical as I never really came to grips with managing
> FreeBSD, don't have any solid benchmarks on hand, and don't want to give up
> the ZFS goodies.
> Thanks for your opinions / advice on making it better.
> David
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