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Date:      Sun, 31 May 2009 19:28:51 +0300
From:      Dan Naumov <dan.naumov@gmail.com>
To:        uqs@spoerlein.net, freebsd-stable@freebsd.org
Subject:   Re: ZFS on top of GELI / Intel Atom 330 system
Message-ID:  <cf9b1ee00905310928q6391408dg48101adac287cc80@mail.gmail.com>
In-Reply-To: <20090531160533.GF18676@acme.spoerlein.net>
References:  <cf9b1ee00905290119w5eea0bfmd018d1c1282ac310@mail.gmail.com> <20090531160533.GF18676@acme.spoerlein.net>

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Hi

Since you are suggesting 2 x 8GB USB for a root partition, what is
your experience with read/write speed and lifetime expectation of
modern USB sticks under FreeBSD and why 2 of them, GEOM mirror?

- Dan Naumov



> Hi Dan,
>
> everybody has different needs, but what exactly are you doing with 128GB
> of / ? What I did is the following:
>
> 2GB CF card + CF to ATA adapter (today, I would use 2x8GB USB sticks,
> CF2ATA adapters suck, but then again, which Mobo has internal USB ports?)
>
> Filesystem =A0 =A0 =A0 =A0 =A0 =A0 1024-blocks =A0 =A0 =A0Used =A0 =A0Ava=
il Capacity =A0Mounted on
> /dev/ad0a =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 507630 =A0 =A0139740 =A0 32=
7280 =A0 =A030% =A0 =A0/
> /dev/ad0d =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A01453102 =A0 1292296 =A0 =A04=
4558 =A0 =A097% =A0 =A0/usr
> /dev/md0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0253678 =A0 =A0 =A0 =A016 =
=A0 233368 =A0 =A0 0% =A0 =A0/tmp
>
> /usr is quite crowded, but I just need to clean up some ports again.
> /var, /usr/src, /home, /usr/obj, /usr/ports are all on the GELI+ZFS
> pool. If /usr turns out to be to small, I can also move /usr/local
> there. That way booting and single user involves trusty old UFS only.
>
> I also do regular dumps from the UFS filesystems to the ZFS tank, but
> there's really no sacred data under / or /usr that I would miss if the
> system crashed (all configuration changes are tracked using mercurial).
>
> Anyway, my point is to use the full disks for GELI+ZFS whenever
> possible. This makes it more easy to replace faulty disks or grow ZFS
> pools. The FreeBSD base system, I would put somewhere else.



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