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Date:      Thu, 20 Dec 2018 13:04:45 +0000
From:      rb@gid.co.uk
To:        Steven Hartland <killing@multiplay.co.uk>
Cc:        Matthew Macy <mmacy@freebsd.org>, freebsd-current <freebsd-current@freebsd.org>, freebsd-fs <freebsd-fs@freebsd.org>
Subject:   Re: The future of ZFS in FreeBSD
Message-ID:  <2A394CBF-7739-4F64-B559-BBF513EC141B@gid.co.uk>
In-Reply-To: <e74fdc25-a120-786e-030a-bcb8a5ef53c5@multiplay.co.uk>
References:  <CAPrugNriggEMMnLTZtf6xNQNYajBYNMnGdN96-ejDYQonoOhgw@mail.gmail.com> <CAHEMsqbhdcy1GKznVhxKAqCabYHvm_G9oxQR6eQrJ372215E0w@mail.gmail.com> <CAPrugNpr1YCo%2Br%2BCCts-uEfdU-nOF6-g15eqODJa_nKia_PwWw@mail.gmail.com> <CAHEMsqaJERWM_HpD4ru8Jj6QhVEb_CoOotzH1oPuYa95AoqWeA@mail.gmail.com> <CAPrugNpU2nnyuxetwvgeHXVNKRiDMk3uO-0OSBZ5nK55PKpY8A@mail.gmail.com> <B527B90E-9C5E-4DC5-8DE5-35A85221BA64@gid.co.uk> <e74fdc25-a120-786e-030a-bcb8a5ef53c5@multiplay.co.uk>

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> On 20 Dec 2018, at 11:58, Steven Hartland <killing@multiplay.co.uk> =
wrote:
>=20
>=20
>=20
> On 20/12/2018 11:03, Bob Bishop wrote:
>> Hi,
>>=20
>>> On 19 Dec 2018, at 23:16, Matthew Macy <mmacy@freebsd.org> wrote:
>>>=20
>>> On Wed, Dec 19, 2018 at 15:11 Steven Hartland =
<killing@multiplay.co.uk>
>>> wrote:
>>>=20
>>>> Sorry been off for a few weeks so must have missed that, please do =
prod me
>>>> on again if you don=E2=80=99t see any response to anything not just =
this. Like many
>>>> others I get so may emails across so many lists it=E2=80=99s more =
than likely I
>>>> just missed it.
>>>>=20
>>>> That said would you say that with the right support we can make =
progress
>>>> on the this prior to the port? I have to ask as the alternative =
version has
>>>> been on the cusp for many years now so it=E2=80=99s feels more like =
a distant
>>>> memory than something that may happen, no disrespect to anyone =
involved, as
>>>> I know all too well how hard it can be to get something like this =
over the
>>>> line, especially when people have competing priorities.
>>>>=20
>>> I am hoping that it's sufficiently important to FreeBSD ZFS =
developers that
>>> they'll give the PR the attention it needs so that it can be merged =
before
>>> summer. My understanding is that it's mostly suffered from neglect. =
TRIM is
>>> most important to FreeBSD and it already had its own implementation.
>>>=20
>>> https://github.com/zfsonlinux/zfs/pull/5925
>> Please correct me if I=E2=80=99m wrong but this looks a lot less =
mature than FreeBSD=E2=80=99s existing TRIM support for ZFS which =
we=E2=80=99ve had in production for six years.
>>=20
>> What is the rationale here? I=E2=80=99m concerned that it looks like =
an opportunity for mighty regressions.
>>=20
> This is the case, but overall this solution is thought to be a better =
approach.
>=20
> With anything like this there is always a risk, so we all need a =
concerted effort to get to one solution.

Not sure what I can contribute, but I can certainly put a box up for =
testing when there=E2=80=99s something to test.

>     Regards
>     Steve
>=20

--
Bob Bishop
rb@gid.co.uk







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