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Date:      Fri, 21 Dec 2018 11:38:55 +0100
From:      Ben RUBSON <ben.rubson@gmail.com>
To:        freebsd-fs@freebsd.org
Subject:   Re: [ZFS] Metadata Allocation Classes
Message-ID:  <F323B26A-0D7D-4686-BE0C-35BC6A50D0F8@gmail.com>
In-Reply-To: <82E338C0-09E3-4648-B49B-C028A03B71D7@gmail.com>
References:  <82E338C0-09E3-4648-B49B-C028A03B71D7@gmail.com>

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> On 22 Nov 2018, Ben RUBSON wrote:
>=20
> Hi,
>=20
> Intel has pushed the "Metadata Allocation Classes" feature to ZFS on =
Linux.
> This allows to store metadata on a so called "special" VDEV, made of =
SSD for instance.
>=20
> This looks really promising.
> I wrote a patch 2 years ago which pins metadata in L2ARC, at eviction =
time.
> This really helps with some specific workloads.
> But "Metadata Allocation Classes" should be one step further in terms =
of performance.
>=20
> Simple question, do you plan to backport this feature to FreeBSD ?
> Or do you first wait for it to reach Illumos (does not seem to be =
there yet) ?
>=20
> ZoL discussion : https://github.com/zfsonlinux/zfs/issues/3779
> ZoL PR : https://github.com/zfsonlinux/zfs/pull/5182

I answer to myself, well "The future of ZFS in FreeBSD" topic in this =
list does :-)

Ben




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