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Date:      Fri, 4 Oct 2019 13:27:20 -0600
From:      Warner Losh <imp@bsdimp.com>
To:        Dennis Clarke <dclarke@blastwave.org>
Cc:        FreeBSD Current <freebsd-current@freebsd.org>
Subject:   Re: ZFS with 32-bit, non-x86 kernel
Message-ID:  <CANCZdfqyof2_DmbW3G3S2q2ZsFo8_zr2YUzO0SrFo1eg-HhiJw@mail.gmail.com>
In-Reply-To: <2264fde0-d386-518f-2bdb-2b86afe1faf3@blastwave.org>
References:  <bdfecbf4-00c6-e104-4090-c1013bac5a7f@FreeBSD.org> <2264fde0-d386-518f-2bdb-2b86afe1faf3@blastwave.org>

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On Fri, Oct 4, 2019, 1:07 PM Dennis Clarke <dclarke@blastwave.org> wrote:

> On 10/4/19 10:05 AM, Andriy Gapon wrote:
> >
> > Does anyone use ZFS with a 32-bit kernel, that is also not i386 ?
> > If you do, could you please let me know?  Along with uname -rmp output.
> > Thank you!
> >
>
> I don't know if that has even been attempted by anyone. The ZIL and ZFS
> log comonents require substantial amounts of memory and I am not aware
> of anyone with arm devices that have 8GB+ of memory. I have had FreeBSD
> current on RISC-V running fairly well with ZFS however that was a purely
> rv64imafdc architecture.
>

In the FreeBSD 10 time frame I know people were running ZFS on arm7 boards.
Iirc, there was a long list of tweaks needed to size of the ZIL. A quick
google didn't find it.

Otoh, I looked at ZFS for NanoBSD when it first came out. I gave up because
the 256MB boards at the time made any kind of storage traffic ran things
out of memory.

Warner


I will watch this thread with curiosity.
>
>
> --
> Dennis Clarke
> RISC-V/SPARC/PPC/ARM/CISC
> UNIX and Linux spoken
> GreyBeard and suspenders optional
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