ZFS on small systems

[illoai at gmail.com]

2009/9/17 krad <kraduk at googlemail.com>:
> 2009/9/17 Ruben de Groot <mail25 at bzerk.org>
>
>> On Thu, Sep 17, 2009 at 04:35:37PM +0200, Anselm Strauss typed:
>> > Thanks for your advice, Steve.
>> >
>> > I looked a bit at the source code and in
>> > /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c and I
>> > found this:
>> >
>> > /* set min cache to 1/32 of all memory, or 16MB, whichever is more */
>> > arc_c_min = MAX(arc_c / 4, 64<<18);
>> >
>> > Could this mean that 16 MB are already enough to run ZFS?
>>
>> I seriously doubt it.
>>
>
> Sun dont recommend it on a system with < 1 gb of ram, 2 or more is preferred
> though.

I believe you can install OpenSolaris (& OS by default only installs
into zfs) with as little as 768M, but it will (in my exp) run terribly.
Even with 4G on a dual-core 64bit lap-top it's pretty sluggish: like
FreeBSD 7 on a 300mHz p2 sluggish.

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