[rescue] OS for ZFS?

Joshua Boyd jdboyd at jdboyd.net
Sun Mar 31 09:36:42 CDT 2013

On Sun, Mar 31, 2013 at 11:39:44AM +0000, microcode at zoho.com wrote:

> I would say 4GB is a good safe minimum for running ZFS on Solaris or
> OpenSolaris. ZFS likes to cache as much as possible. If you want good
> filesystem performance *and* enough RAM left to actually do something else
> with the box beside cache filesystem data, you need some RAM.

People say that 4gb is minimum, but I've never had trouble with using
less.  I've gone as low as 1.25gigs without trouble, hosting both a ZFS
mirrored pair and a 4 disk raidz, along with lightly used Postgres and
MySQL. A few years ago, 1 gig was recommended as minimum with 2 gigs
being a pretty good amount for a moderate workgroup.  I don't really
think that has changed.

Just to be clear, 1.25 was what the machine had, not the minumum to make
the system happy. 

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