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Date:      Fri, 16 Dec 2022 04:25:34 +0000
From:      bugzilla-noreply@freebsd.org
To:        fs@FreeBSD.org
Subject:   [Bug 244692] gjournal: Does not support TRIM
Message-ID:  <bug-244692-3630-wWqf2IwJx1@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-244692-3630@https.bugs.freebsd.org/bugzilla/>
References:  <bug-244692-3630@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D244692

Alexey Dokuchaev <danfe@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |danfe@FreeBSD.org

--- Comment #1 from Alexey Dokuchaev <danfe@FreeBSD.org> ---
I'm in the process of moving to an SSD, and now considering various approac=
hes
to data storage.  One of the things I wanted to try is UFS+gjournal(8)+async
which potentially performs noticeably better than ZFS, esp. on lower-end and
mobile CPUs, and gives explicit control over sync(2) and fsync(2) which e.g.
databases can benefit from.

Unfortunately, I've encountered the same problem as Paul: apparently
gjournal(8) does not propagate TRIM support from the drive to upper levels,=
 so
even forcing TRIM on UFS won't help as underlying provider would just ignore
such requests rather than passing them down to the hardware.

(In reply to Paul from comment #0)
> It seems, gjournal still does not support TRIM in 2020?!.. neither for da=
ta
> device nor for journal device.
It's the end of 2022, and it still does not. =C2=AF\_(=E3=83=84)_/=C2=AF

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